Draw the four resonance forms of the allylic carbocation intermediates when the alkene below reacts with HBr as shown below.

Q: Which is the least stable carbocation?

A: In order to determine the stability of carbocation  we have to check following factors sequencly 1)…

Q: What happens to the rate of an SN2 reaction under the following conditions? [RX] is halved, and…

A: Given: [RX] is halved, and [:Nu-] is doubled.

Q: 2. Reaction of this alkene to the different reagents in the arrows HCl CH,I,, Zn(Cu), ether BH3,…

A: A. Addition of HCl to unsymmetrical alkene follows Markownikoff's rule. That's why Cl^- adds to more…

Q: Draw all the monochlorination products, including stereoisomers, that are formed from radical…

A: Given:

Q: Which of the following alkynes would be the best starting material to synthesize 2,2- dibromopentane…

A: Markonilov's Rule: Addition of HX (X= Cl,Br) to the alkene/alkyne occurs in such a way that H bonded…

Q: Draw both resonance structures of the most stable carbocation intermediate in the reaction shown.

A: The attack of H+ on the given molecule is shown. A secondary allylic carbocation is formed.

Q: What is the major product of electrophilic addition of HBr to the following alkene? Explain your…

A: The given reactant is shown below. The addition of HBr to the given reactant will take place via…

Q: Show how to control the stereochemistry and regiochemistry (orientation) of additions to alkenes to…

A: Regiochemistry refers to the preference of one orientation over another whereas stereochemistry…

Q: What is the major product when the methoxy substituent in the preceding reaction is bonded to C-2 of…

A: The major product of the given reaction depends on the charge distribution in the diene and…

Q: Name the following alkene and draw the product of the reaction with KMnO4.

A: The hydrocarbons in which two of the carbon atoms are bonded to each other by a double bond are…

Q: To make Halocyclopentane, what reagents and substartes are needed? Which one(below) is related with…

A: Alkyl halides (also known as haloalkanes) are compounds in which one or more hydrogen atoms in an…

Q: Draw the two resonance structures of the carbocation intermediate formed in this reaction. Do not…

A: Resonance structure:If the Lewis structure of a molecule or ion cannot explain by a single structure…

Q: Draw all monochlorination products obtained from the free radical chlorination of…

A:

Q: Br a) CH3 O: b)

A: Given reactions, (a) (b)

Q: Which reaction would you expect to be faster, addition of HBr to cyclohexene or to…

A: The question is based on the concept of organic reactions. we have to identify which of the given…

Q: When HBr adds to a conjugated diene, what is the rate-determining step?

A: The intermediate formed in reaction of alkene with HBr is a carbocation. And the rate determining…

Q: What happens to the rate of an SN1 reaction under the following conditions? [RX] is halved, and…

A: Nucleophilic substitution reaction The nucleophilic substitution reaction is a type of reaction in…

Q: Which is more highly regioselective: reaction of an alkene with BH3 or with 9-BBN?

A: The structure of 9-BBN and BH3 are given below.

Q: For the following reaction what is the most likely product?

A: From the given reaction the most likely product can be shown below,

Q: Draw the two resonance structures of the carbocation intermediate formed in this reaction. Do not…

A:

Q: What alkenes are formed from attached alkyl halide by an E2 reaction? Use the Zaitsev rule to…

A: E2 elimination is a bimolecular elimination reaction. It is a 2nd order reaction involving the…

Q: Which one of the alkenes below is not conjugated?

A: Conjugated alkenes are the compounds having double bonds joined by sigma bonds.  Conjugated alkenes…

Q: Which alkene would you expect to have the lowest heat of hydrogenation?

A: The answer is given as follows

Q: Draw the two resonance structures of the carbocation intermediate formed in this reaction. Do not…

A: Alkene or pi bond compounds on reaction with H+ to give the corresponding carbonation (an…

Q: Which is the most reactive carbon hydrogen bond in cyclohexene in the shown reaction ? NBS light The…

A:

Q: In the double elimination reaction involving the synthesis of diphenylacetylene from meso…

A: The synthesis of diphenylacetylene from meso 1,2-dibromo-1,2-diphenylethane

Q: Which alkene from the choices can react with excess Hbr to yield the major product shown in the…

A: Given reaction:

Q: Draw both resonance structures of the most stable carbocation intermediate in the reaction shown. +…

A: Given : structure of reactant and reagent.  This is a electrophilic addition reaction

Q: Draw the structure of the conjugated diene that will react with one equivalent of HBr to yield a…

A: Addition of HBr to alkene proceed as follows, at first H+ is added to the alkene . Then Br- is added…

Q: Which of the products is the 'E" alkene? Which product is the "Z" alkene? Which product would be…

A: The compound named as A and B for identification so the compound A is 'Z' Alkene and compound B is…

Q: In the addition reactions of alkynes, the reagents undergo transformation to form first. a. a…

A:

Q: Which is a more stable intermediate in pair?

A: Carbocation : carbon atom bearing positive charge is called carbocation.  we can categorized…

Q: Which alkyl halide(s) would give the following alkene as the only product of an elimination…

A:

Q: Draw all resonance structures for the carbocation formed by ortho attack of the electrophile +NO2 on…

A: A species with a larger size can easily accommodate a negative charge. In other words, in a large…

Q: Draw the two addition products formed when the alkene shown below reacts with HCI and circle the one…

A: The given reaction is the addition of HCl to the alkene. According to Markovnikov’s rule, the…

Q: When HBr adds to a conjugated diene, what is the product-determining step?

A: The addition of the H+ is basically the rate determining step of the reaction. Hence the product…

Q: Which reaction would you expect to be faster, addition of HBr to cyclohexene or to…

A: • Since, we know that there is addition reaction occurs between olefins or alkene with hydrogen…

Q: What alkenes are formed from attached alkyl halide by an E1 reaction? Use the Zaitsev rule to…

A: In an E1 elimination reaction, the more substituted alkene is formed as the major product.

Q: Which carbocation is least stable and which is most stable?  Which carbocation can't be rearranged…

A: The order of stability of carbocations -3° > 2° > 1° >methyl cation

Q: Which one is the least stable carbocation? Select one:

A: Carbocation is planar and sp2 hybridized. It is an electron deficient species. Hence, the stability…

Q: Heck reactions take place with alkynes as well as alkenes. The following conversion involves an…

A: We have to draw the intermediate of the given Heck coupling reaction.

Q: Which of the following alkenes produces the highest yield of 2,3-dimethylpentan-3-ol at the fastest…

A: Given: Following alkenes produces the highest yield of 2,3-dimethylpentan-3-ol at the fastest rate:

Q: Draw the alkene products including E,Z isomers that might be obtained by dehydrohalogenation of…

A:

Q: -Br A B Br-H-

A: A carbocation is a molecule in which a carbon atom with three bonds has a positive charge.

Q: Draw the organic product obtained on treatment of each of the following two alkenes with bromine:…

A: The products formed form two alkenes with bromine have to be drawn. The products formed form two…

Q: Zaitsev's Rule refers to: which alkene is favored in a product mixture O how resonance contributors…

A: Zaitsev's rule:-  This rule states that during the elimination reaction, more substituted alkene Is…

Q: The oxymercuration/demercuration of the compound (methylcyclohexene) below will form what product?

A: Oxymercuration-demercuration of 1-methylcyclohexene with water and mercuric acetate is followed by…

Q: Illustrate the Electrophilic Addition of HX to an Alkene ?

A: The electrophilic addition reaction is a type of organic reaction in which the electrophile attacks…

Q: List the following carbocation intermediates in order from least stable to most stable. Explain why…

A: We know that the most stable is 3o-carbocation because the three -CH3 group minimized the positive…