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Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Propose a mechanism for the reaction of pent-1-yne with HBr in the presence of peroxides. Show why anti-Markovnikov orientation results.
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- In the following reaction mechanism, what best describes the role of the Grignard reagent? + CH₂MgBr 1) ether 2) H3O+ The Grignard reagent acts as a nucleophile and attacks the carbonyl carbon. The Grignard reagent acts as an electrophile and is attacked by the oxygen. The Grignard reagent is first protonated by the acid. The Grignard reagent acts as a nucleophile and removes a proton from the methyl group attached to the carbonyl carbon.arrow_forwardShow how the reaction of an allylic halide with a Grignard reagent might be used to synthesize the following hydrocarbons.(a) 5-methylhex-1-enearrow_forwardIn addition to α cleavage, some aldehydes and ketones undergo theMcLafferty rearrangement. In the McLafferty rearrangement, a hydrogenon a carbon three atoms from the C=O is transferred to the carbonyl oxygen and a carbon–carbon bond is broken. This process forms an alkene and the radical cation derived from an enol, which appears as a fragment in the mass spectrum. Draw the products formed from the McLafferty rearrangement of 1-phenylpentan-1-one, and identify the fragment that results in the givenmass spectrum. If a mass spectrum of the ester ethyl pentanoate(CH3CH2CH2CH2CO2CH2CH3) is recorded, what is the mass of theradical cation formed by the McLafferty rearrangement?arrow_forward
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