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← Back to Mechanisms
Hydroboration-Oxidation
Alkenes
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Step 1 of 2
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Step 1
Step 2
Step 1: Borane Addition
BH₃ adds with syn stereochemistry (four-membered TS)
Line-angle
H₂C=CHCH₃
Condensed
Alkene
B
Line-angle
BH₃
Condensed
syn
B
Line-angle
H₃CCH₂CH₂BH₂
Condensed
Anti-Markovnikov, Syn addition