Diene maleic anhydride

Diene maleic anhydride

Diene maleic anhydride. The diene in the sample is determined to be alpha-phellandrene [MW 136. 6: The Diels-Alder (4 + 2) Cycloaddition Reaction is shared under a CC BY-NC-SA 4. 50 g oil sample. 2)Give structures for Acyclic dienes may rotate around a single bond, but dienes locked in the s-trans conformation do not react. How are the carbonyl groups on either reactant affecting the rate of the reaction for Chemistry questions and answers. The reaction of 1,3-butadiene with unsubstituted dienophile (as shown above) is very slow (activation energy about 27 kcal/mol) but Diene Value by Maleic Anhydride Addition Reaction. One Reagent Lane Fair Lawn, NJ 07410 For information in North America, call: 800-ACROS-01 This reaction can sometimes be called a cycloaddition because it involves four pi electrons in the diene and two pi electrons from the dienophile1. The degree of the ionomer formation increased with increasing the zinc oxide content, and it was also enhanced by Along these lines, a team from Syracuse Univ. If we look at the molecule in this way, with the hydrogens highlighted on the ends of the diene and the dienophile, it may be easier to see the stereochmical relationships in the exo and endo products. Propose a mechanism for the opening of the product anhydride (cis-4-cyclohexene-1,2-dicarboxylic acid) under acidic conditions to render a dicarboxylic acid product. Write the mechanisms for the formation of the a) Dicarboxylic anhydride from diene and maleic anhydride b) Dicarboxylic acid from dicarboxylic acid anhydride and water. The Dienophile. Endo Products Tend To Be Favored In The Diels-Alder Even Though They Are More Sterically Hindered. Heating the 3- sulfolene results in a rearrangement, producing the gaseous 1,3-butadiene that reacts with the maleic anhydride as it is produced to form the above product. Stereochemistry of the diene condensation of cyclopentadiene with citraconic anhydride and steric transformations of the endo and exo adducts. 06 g/mol) used was intended to completely react with the diene in the oil sample to exactness. Jun 4, 2020 · Polypropylene ethylene propylene diene monomer (PP/EPDM) polymer composites reinforced by spear grass (10, 20, 30, 40, and 50 wt%) were prepared with and without compatibilizer. Gently shake (or use a vortex stirrer) and warm the tube (approximately 40 °C) to dissolve the maleic anhydride, a small amount of ethyl acetate can be added. b) [4+2] cycloaddition between (2E,4E)-hexa-2,4-dien-1-ol and Reaction of cyclopentadiene with maleic anhydride 1. These substrates react to form the Diels-Alder product, cis—1,2,3,6-tetrahydro-4,5-dimethylphthalic anhydride. the tensile modulus of the cured resin peaks at about 50–60% maleic anhydride [8]. Bulletin of the Academy of Sciences of the USSR Division of Chemical Science 1958, 6 (1) , 95-102. Collect an IR spectrum of the isolated compound. 40 mL of ligroin and shake. Jan 7, 2020 · For example, Vauthier et al. Thus, ethylene itself reacts sluggishly, but propenal, ethyl propenoate, maleic anhydride, benzoquinone, propenenitrile, and similar compounds are highly Jan 15, 2023 · In general, Diels-Alder reactions proceed fastest with electron-donating groups on the diene (eg. Cycloheptatriene does not add to maleic anhydride in a normal Diels-Alder fashion. 2 Relevant identified uses of the substance or mixture and uses advised against Identified uses : Laboratory chemicals, Synthesis of substances The diene must be in a “cisoid” conformation in order to react. In contrast to the primary method, near-infrared spectroscopy (NIRS) is a cost-efficient and fast analytic solution for the determination of diene value in pyrolysis gasoline. Thus, ethylene itself reacts sluggishly, but propenal, ethyl propenoate, maleic anhydride, benzoquinone, propenenitrile, and similar compounds are highly Chemistry questions and answers. acyclic 1,3-diene B. In the given question, it is asked to find the diene that would react with maleic anhydride. Oct 3, 1998 · Grafting of maleic anhydride ( MA ) onto fast-cure ethylene-propylene diene terpolymer rubber was studied. 1 g sample of a crude oil that was determined to contain 60 % by weight of diene. Product name : Maleic anhydride Product Number : M188 Brand : Aldrich Index-No. 6 mol% of diene units), to introduce anhydride functionalities via the Lewis acid-catalyzed Alder Ene reaction. Identify the molecule with a conjugated system of double bonds that can act as a 4π electron donor in the Diels-Alder reaction. A Diels–Alder reaction can only occur when the diene is in the s-cis conformation. 1]hept-5-ene-2,3-dicarboxylic anhydride. 2)Give structures for Stereochemistry of cyclic compounds communication 16. 3. Predict a structure for the product. • When diene reacts with dienophile reaction goes through different transition states. 8 g of 3-sulfolene. These reactions can be extremely violent, as in the case of 1-methylsilacyclopentadiene [J. Maleic anhydride appears as colorless crystalline needles, flakes, pellets, rods, briquettes, lumps or a fused mass. • Reaction mechanism explained by DFT in Diels Alder reaction. Add it to a clean and dry 50 mL round-bottom flask. The preference for endo versus exo is especially curious since the endo products appear to be more sterically hindered. 1. 1 10. This AI-generated tip is based on Chegg Question: 1. 3-diene O acyclic 1. : 108-31-6 1. This is, work backward from the adduct 1 to the structure of Nov 25, 2013 · Thermoplastic elastomers (TPEs) composed of maleic anhydride-grafted ethylene–propylene–diene terpolymer (MAH-g-EPDM) and ZnO were characterized using IR, TGA, solvent extraction, crosslink density, and physical properties. what makes maleic anhydride particularly reactive to a diene? select all that apply ring strain from the double bond carbons that is relieved by the change in hybridization oxygens that make the final product more polar two electron donating carbonyl groups directly adjacent to the double bond carbons two electron withdrawing carbonyl groups directly adjacent to the double bond carbons Aug 1, 2009 · Pasbakhsh et al. In this experiment a reaction between anthracene and maleic anhydride will result in anhydride. Jul 26, 2007 · Diene Value by Maleic Anhydride Addition Reaction. 06 g/mol) used was intended to completely react with the diene in the oil sample to exactness, Heat diethyl ether adduct alpha phollandrene malele anhydride 10. Equilibrium of 1,3-butadiene conformers. Type I results in a fused bicyclic ring system. Furan and maleic anhydride can The Diels-Alder reaction is a concerted reaction, this means it occurs in only one step. diene dienophile head-to-head overlap of p-orbitals to form two new sigma bonds In this experiment, you will perform a Diels-Alder reaction using 2,3-dimethyl-1,3-butadiene as the diene and maleic anhydride as the dienophile. Explain how this component would enhance the interaction between the diene and the dienophile in the following case. Use this link for bookmarking this species for Our expert help has broken down your problem into an easy-to-learn solution you can count on. 251g % Recovery: Not the question you’re looking for? Post any question and get expert help quickly. View the full answer Step 2. Due in 4 days c tion of a diene found in eucalyptus oil 0/10 answered Which diene would react with maleic anhydride to form the product shown? product O A 1 OB oc O D IV [ Fullscre nline The Diels-Alder reaction of a diene found in eucalyptus oil2/10 answered omework Due in 4 days 14. The method gives a measure of the conjugated diolefin content of the sample. Draw the other stereisomers of the product formed from the reaction between furan and maleic anhydride. Organomet. In this approach, the functionalisation of polyethylene is achieved by the combination of two well known processes: the copolymerization of ethylene with a non conjugated diene, followed by the reaction of the copolymer with maleic anhydride (MAH) via Alder Ene reaction Jan 22, 2016 · Additionally, it is possible to control the coating thickness of PDOPA by regulating the reaction time. Draw all the significant curly arrows for a) generation of the 1,3-butadiene from sulfolene and b) reaction of this in situ formed diene with maleic anhydride to form the Diels-Alder product as shown. MSDS Name: Maleic Anhydride, 99% (pellets) Catalog Numbers: AC125240000, AC125240010, AC125240030, AC125240040, AC125240250, AC125245000 AC125245000 Synonyms: MA, 2,5-Furandione Company Identification: Acros Organics N. True Unreacted Maleic anhydride can be separated from the adduct by vacuum filtration False Moisture-free conditions must be kept at all times during the reaction The amount of diene in the eucalyptus oil will be determined using gas chromatogram analysis The diene will be identified by its melting point Submit Answer Incorrect. Details of the supplier of the safety data sheet Step 1. The Diels-Alder Reaction. Is it cis or trans? Is it endo or exo? Draw the appropriate structure demonstrating the stereochemistry of the adduct. 2. The amount of maleic anhydride [MW 98. It was obvious that the use of EPDM Feb 6, 2010 · CAS Registry Number: 5443-16-3. , funded by the National Science Foundation (NSF), elucidated a strategy for the production of biobased maleic anhydride. 3-diene O acyclic 1,3-diene O alkyl-substituted acyclic 1. Owing to the difference of Aug 15, 2020 · Intramolecular Diels-Alder: the rules are breakable. Draw the mechanism for the Diels-Alder cycloaddition between 1,3-butadiene and maleic anhydride. alkyl-substituted acyclic 1,3-diene please help asap!! Thank you The diene in the sample is determined to be alpha-phellandrene [MW 136. The Diels-Alder reaction is a (4 + 2) cycloaddition reaction between a diene and a dieophile that a forms 6-membered ring and requires heat. 0 gram of powdered maleic anhydride and 1. Maleic anhydride is frequently used as a dienophile in Diels Alder reactions. It is for this reason that you must "crack" dicyclopentadiene back to the monomer in the first part of your lab. The diene value, or maleic anhydride value (MAV), is usually determined by the lengthy Diels-Alder wet chemical method (UOP326-17), requiring highly trained analysts. The electron donating group on α-phellandrene aids in the movement of electrons around the dienophile by induction and increases the HOMO energy enough to react effectively with the maleic anhydride. Apr 22, 2024 · The authors of this reaction won the Nobel Prize in 1950. 1 85g Volume of diene used: 0. Diene Value by Maleic Anhydride Addition Reaction. evaluated the reaction between a plasma polymer surface functionalized with furan moieties and maleic anhydride in solution. Xylene (dimethylbenzene) is used as a high boiling temperature The present work addresses the use of the pendant unsaturations of an ethylene/5,7-dimethylocta-1,6-diene copolymer (containing 3. Shipped both as a solid and in the molten state. In their study, the authors found that the consideration of an equilibrium reaction did not considerably change the values obtained for the rate constant of the forward Diels–Alder reaction. Diels-Alder reaction: a) generation of buta-1,3-diene from 3-sulfolene and reaction with maleic anhydride. Weight of maleic anhydride used: 1 85 mg = 0. Heat diethyl ether adduct alpha phellandrene malele anhydride 10. alkyl groups). Nov 6, 2020 · The [4 + 2]-cycloaddition of a conjugated diene with 4 π-electrons and a dienophile (an alkene or an alkyne) with 2 π-electrons—commonly known as the Diels–Alder reaction—is one of the Maleic anhydride is known as an excellent dienophile in the Diels-Alder reaction to produce phthalate ester derivatives. O= 20 = Experimental Procedure Weigh out 1. 4 M solution of maleic anhydride is made in xylene and not in water. 40 mL of ethyl acetate to a Craig tube. Secondly, Diels-Alder reactions are stereospecific. We will then try to identify the unknown diene through properties such as melting point and IR spectra of the adduct. 25 pts Question 22 Consider the Diels-Alder reaction of anthracene and maleic anhydride. From your knowledge of how a Diels-Alder reaction works, use the structure of the actual adduct 1 to deduce the structure of the diene which actually added to the maleic anhydride. Vapors, fumes and dusts strong irritate the eyes, skin and mucous membranes. The student started with a 3. Sep 3, 2018 · For example, the Diels-Alder reaction of furan with maleic anhydride in acetonitrile at 40 °C gives the exo product exclusively after 48 h. 2) Use slow heating to carefully observe melting. Anthracene acts as the diene and maleic anhydride functions as the dienophile. A chem 335 student was tasked with synthesizing a Diels alder adduct of maleic anhydride and one of the dienes listed on pg- 108 of the lab manual. , Chem. “For this to work, you have to selectively Other names: 2,5-Furandione; cis-Butenedioic anhydride; Dihydro-2,5-dioxofuran; Maleic acid anhydride; Toxilic anhydride; Maleic anhydride, briquettes; Anhydrid kyseliny maleinove; Maleinanhydrid; Rcra waste number U147; UN 2215; 2,5-Furanedione; M 188; NSC 137651 Permanent link for this species. In the An ethylene/5,7-dimethylocta-1,6-diene copolymer was successfully modified with maleic anhydride (MAH) via the Lewis acid-catalyzed Alder Ene reaction. This method is for determining maleic anhydride reactivity with a wide variety of oils, ranging from debutanized light hydrocarbon distillates to heavy drying oils, using titration. acyclic 1,4-diene D. Chemical structure: This structure is also available as a 2d Mol file or as a computed 3d SD file. This means that the substituents attached to the both the diene and the dienophile retain their stereochemistry Jul 1, 2000 · The maleic anhydride grafted ethylene-propylene-diene monomer (MAH-g-EPDM) was used as a compatibilizer in this immiscible system. 61-4 :; Diene Dienophile The purpose of this experiment is to form 9,10-dihydroanthracene-9,10-6. S. Klopper, and The D iels‐ A lder Reaction with Maleic Anhydride*Present address, University of The Dienophile. Overview of Actual Reaction: Anthracene (1) will serve as a student-friendly low-smell Diels-Alder diene, with the labeled carbons functioning as the reactive diene. This work proposes a new approach to the functionalisation of polyethylene avoiding the use of peroxides. , 1979, 179, c19]. There are 3 steps to solve this one. There are 2 steps to solve this one. The Diels-Alder reaction is a single step process, so the diene component must adopt an s-cis conformation in order for the end carbon atoms (#1 & #4) to bond simultaneously to the dienophile. 1, sample 3) [2]. Label the diene and the dieneophile in your reaction. The purpose of this experiment is to form 9,10-dihydroanthracene- 9,10−α,β -succinic anhydride by way of a Diels Alder reaction between anthracene and maleic anhydride, as shown in the reaction below. 2 g sample of a crude oil that was determined to contain 71 % by weight of diene. Continue tapping until the sample ___. Type II results in a bridged bicyclic ring system. • Effect of feasible solvent for 2,4-hexadiene-1-ol as diene and maleic anhydride dienophile studied. Question: Question 4 1 pts All of the following would be suitable reaction partners in a Diels-Alder reaction with maleic anhydride EXCEPT O cyclic 1. 215mL Weight of cyclic anhydride crystals recovered: 0. The effect of the amount of the MA, initiator (dicumyl peroxide), and electron donor (stearamide) on graft content are described. Apr 1, 2023 · 2,4-hexadiene-1-ol as diene and maleic anhydride as dienophile is used. It is a powerful tool for constructing 6-membered rings and has been used for the synthesis of many complex molecules. Oliver Grummitt, R. Our expert help has broken down your problem into an easy-to-learn solution you can count on. products of the reaction of maleic anhydride with each diene are shown below. [MW of diene 136g/mol] The amount of maleic anhydride Jun 7, 2014 · Great question! It turns out that the rate of formation of the "expected" endo product is actually ~500 times faster than the rate of formation of the exo product. cyclic 1,3-diene C. The Diels-Alder reaction is a cycloaddition reaction between a conjugated diene and dienophile. May 31, 2006 · Diene Value by Maleic Anhydride Addition Reaction. Study with Quizlet and memorize flashcards containing terms like To prepare a sample in a capillary tube for a melting point determination, gently tap the tube into the sample with the ___ end of the tube down. The 3d structure may be viewed using Java or Javascript . The modified PPTA powder improved the comprehensive property of ethylene-propylene-diene-terpolymer grafted maleic anhydride (EPDM-g-MAH), and it proved that this method can enhance the strength and electric insulativity of EPDM-g-MAH. : 607-096-00-9 CAS-No. In the case of the dienes, we explored protonation of the carbonyl oxygens and the oxygen belonging to the five-member ring of the maleic anhydride system (Figure S18b). Consider the furan - maleic anhydride reaction. Below 20% maleic anhydride concentration, Product name : Maleic anhydride Product Number : M188 Brand : Aldrich Index-No. B-succinic anhydride by way of a Diels Alder reaction between anthracene and maleic anhydride, as shown in the reaction below. Purpose: The purpose of this experiment is to understand and perform a Diels-Alder reaction between an unknown diene from Eucalyptus Oil and the known dienophile Maleic Anhydride. Question: Draw a mechanism for the Diels-Alder reaction occurring between 9-anthraldehyde and maleic anhydride. The student started with 6. : AC125240000; AC125240050; AC125240010; AC125240040; AC125240250; AC125240251 CAS No 108-31-6 Synonyms 2,5-Furandione; MA Recommended Use Laboratory chemicals. 23 g/mol). 5% maleic anhydride con-centration (Table 5. 5. The product of the reaction, 4-cyclohexene-cis-1,2-dicarboxylic anhydride, was further analyzed to confirm its properties with unsaturation tests and melting point analysis. Diels-Alder Adduct Endo or Exo? The diene value, or maleic anhydride value (MAV), is usually determined by the lengthy Diels-Alder wet chemical method (UOP326-17), requiring highly trained analysts. Cyclopentadiene, the diene you use in your Diels-Alder reaction with maleic anhydride, readily undergoes a Diels-Alder reaction with itself to give dicyclopentadiene. β-nucleating agent used was TMB-5, a patented substituted aromatic amide compound (the chemical structure provided by the supplier is shown in Fig. In this chapter, we will consider the one reaction of maleic anhydride that has been most investigated in the last half-century. Jan 1, 2012 · EPDM grafted with maleic anhydride at a ratio of about 2% (trademark MB01) and a melt rate of 2. The Diels-Alder Reaction of Cyclopentadiene With Maleic Anhydride The endo and exo products can be rationalized by looking at both endo and exo addition of the dienophile. Diels-Alder reaction lab questions 1) Explain why a 0. Product of α-phellandrene + methacrolein: 4. This visual indicator titration method is for determining maleic anhydride reactivity with a wide variety of oils ranging from debutanized light hydrocarbon distillates to heavy drying oils. In the presence of equal molar quantity of propylene glycol and diethylene glycol, the tensile modulus reaches a maximum at 66. Add 0. The reactants in a Diels–Alder reaction are a conjugated diene and a dienophile. However, the Diels–Alder is a reversible reaction. Unlock. Then, with the___ end of the tube down, tap the sample down slowly or ___ to move the sample 1) Use quick heating to estimate the melting point. The strategy uses supported vanadium oxides to convert levulinic acid, a sugar derivative, into maleic anhydride at around 75% yield. 2 Relevant identified uses of the substance or mixture and uses advised against Identified uses : Laboratory chemicals, Synthesis of substances Sep 13, 2017 · 1,3-Cyclohexadiene-maleic anhydride | C10H8O3 | CID 129680641 - structure, chemical names, physical and chemical properties, classification, patents, literature Condensation with Cyclic 1,3-Diene Systems. V. Being able to make a ring containing an alkene is useful in various types of synthesis reactions. 4-diene. Show transcribed image text. Show the reaction between maleic anhydride and water. Write the mechanisms for the formation of the. The example diene, 1,3-butadiene, exists in an equilibrium between an s-cis and an s-trans conformation. What are the structures of the diene and dienophile you would use to synthesize the following product? Xylene: Flammable & Irritant Anthracene: Irritant Maleic anhydride: toxic & corrosive Briefly describe the hazards associated with xylene, anthracene, and maleic anhydride. [11] prepared maleic anhydride (MA) grafted ethylene propylene diene rubber (EPDM) or EPDM-g-MA, to increase the compatibility of EPDM and HNT. Maleic anhydride is also a very good dienophile, because the electron-withdrawing effect of the carbonyl groups causes the two alkene carbons to be electron-poor, and thus a good target for attack by the pi electrons in the diene. Maleic anhydride undergoes a potentially explosive exothermic Diels-Alder reaction with 1 Figure 5. a) Which compound is the diene? b) Which compound is the dienophile? c) Draw the resonance structures of furan below. Uses advised against Food, drug, pesticide or biocidal product use. 1]hept-5-ene-cis-2,3-dicarboxylic anhydride, also called 5-norbornene-cis-2,3-dicarboxylic anhydride (1). For example, here’s the Diels-Alder reaction of cyclopentadiene with maleic anhydride. The stearamide suppresses the side reactions Aug 1, 2009 · Maleic anhydride grafted ethylene-propylene-diene monomer (MAH-g-EPDM) was prepared by peroxide-initiated melt grafting of MAH onto EPDM using a HAAKE internal mixer at 180°C and 60 rpm for 5 min and … May 12, 2010 · An alternative route for the preparation of polar polyolefins involving “site specific” functionalisation is presented. Pls help Questions 1. The effect of adding the nanoclay and MAH-g-EPDM on the oscillatory shear rheological properties, dynamic mechanical performance, relaxation behavior and morphology of the nanocomposites were studied. Diene Value by Maleic Anhydride Addition Reaction ASTM UOP326-06 This visual indicator titration method is for determining maleic anhydride reactivity with a wide variety of oils ranging from debutanized light hydrocarbon distillates to heavy drying oils. Other names: Anthracene, 2,5-furandione adduct; Anthracene,maleic anhydride adduct; endo-9,10- (α,β-Succinic anhydride)anthracene; 9,10 (3',4 Nov 14, 2012 · In this experiment you will react cyclopentadiene (the diene) with maleic anhydride (the dienophile) to produce the bicyclic compound, endo-bicyclo[2. The maleic anhydride is polarized, with electron density drawn toward the anhydride functional group on one side of the ring. 2. Attachments to the reactants remain attached as spectator atoms. Scheme 3. The Diels-Alder mechanism between a diene and a dienophile is _____, which means that bond breaking happens _____ as bond forming. SO2 + Jul 10, 2020 · We even considered protonation of the diene on the metoxy and trifluoromethyl groups, but this leads to much high-energy carbocations (not shown in Figure S18). Cyclopentadiene and maleic anhydride can react to form either the endo- or exo-adduct bicyclo[2. Previous question Next question. With endo addition, the dienophile adds to the diene in such a way that the carbonyl substituents are “inside” or directly under the diene p-system during the Exercise 10. Question: 4. The triene shown here reacts with 2 equivalents of maleic anhydride to yield a product with the formula C17H16O6. May 11, 2018 · 1. 0 license and was authored, remixed, and/or curated by LibreTexts. 1) Are the pi-bonds on furan electron rich or poor? Explain using the resonance structures you drew above. The Diels–Alder cycloaddition reaction occurs most rapidly if the alkene component, called the dienophile (“diene lover”), has an electron-withdrawing substituent group. 3 g/10 min, was obtained from Haimen Borun Engineering Plastics Company, PR China. Transcribed image text: 1. Answer. 1), purchased from Jul 21, 2008 · The diene produced is very electron-rich, which reacts with the electron-poor maleic anhydride. The student started with 5. 3) Use slow heating to confirm the careful measurement. Moreover, all of the atoms that are participating in the reaction form bonds simultaneously. Here’s the best way to solve it. Experiment 5: Diels-Alder Reaction Maleic Anhydride and Anthracene 1. Diels-Alder reaction has high synthetic utility for making unsaturated six-membered rings. The reaction between sulfolene and maleic anhydride is shown below. Melts at 113 °F. For many acyclic dienes the s-trans Question: Question 4 1 pts All of the following would be suitable reaction partners in a Diels-Alder reaction with maleic anhydride EXCEPT O cyclic 1. [MW of diene 136g/mol] The amount of maleic anhydride used was intended to completely Product Name Maleic anhydride Cat No. The endo- adduct is formed exclusively. 100 g of maleic anhydride and 0. Two types of connectivity for intramolecular Diels-Alder reactions exist: Type II - a branched connection where the dienophile is attached (at length) at position 2 of the diene. The potentiometric method and Fourier transform infrared spectroscopy are used to obtained the graft content. 4. Using maleic anhydride and naphthalene (C10Hs), show what mechanism the reaction should undergo and what product should form. The maleic anhydride polypropylene (MAPP) was applied as compatibilizer to the Question: All of the following would be suitable reaction partners in a Diels-Alder reaction with maleic anhydride EXCEPT A. Jan 22, 2016 · Additionally, it is possible to control the coating thickness of PDOPA by regulating the reaction time. Question: write a balanced equation for the diels-alder reaction between alpha-phellandrene and maleic anhydride. ) Diels-Alder reaction is the combination of a diene and a dienophile. 1) Use quick heating to estimate the melting point. Of historical significance is the formation of a cyclohexene derivative 3 from a conjugated diene (butadiene) 2 and a dienophile (maleic anhydride, MA) 1 as reported 2 H, R C H C HC/ 'c-- \ --4 II I 0 Amar Patel (UCD) 16. Maleic anhydride (2) will function as the Our expert help has broken down your problem into an easy-to-learn solution you can count on. . [Interestingly, in this reaction the endo is intially the dominant product (formed at a rate about 500 times faster than the exo, , but quickly reverts to the starting materials. we fh md hk cm kc hm vv yt xh