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Alkenes. Addition Reactions Synthesis. Addition of HBr or HCl Markovnikov Addition. HBr Addition with RO-OR Anti-Markovnikov. Free-Radical Mechanism. Addition of Br 2. A Similar Mechanism to the Addition of HBr?. Trans is formed exclusively ( No cis is formed).

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Presentation Transcript
alkenes

Alkenes

Addition Reactions

Synthesis

definitions
Definitions
  • Stereospecific – only one stereoisomer is formed at the expense of the other (e.g. trans vs. cis)
  • Stereoselective – one stereoisomer is formed preferentially over the other.
slide43
Oxymercuration – the more highly substituted alcohol formsHydroboration– the less highly substituted alcohol forms
problem
Problem

A symmetrical unknown compound A, C8H16, reacts with H2 on a 1% Pt/C catalyst to form B (C8H18). Treatment of A with O3 followed by Zn/HOAc affords butanone only. Identify A and B.