Is Bh3 Anti-Markovnikov

Hydroboration-Oxidation is a two step pathway used to produce alcohols. The reaction proceeds in an Anti-Markovnikov manner, where the hydrogen (from BH3 or BHR2) attaches to the more substituted carbon and the boron attaches to the least substituted carbon in the alkene bouble bond.

Why is BH3 anti-Markovnikov?

Because the left carbon has a methyl and the right carbon has two hydrogens, the hydrogen adds to the side with LESS hydrogens, rather than more, correlating with anti-Markovnikov addition. This ensures the addition of the hydroxide on the LESS substituted carbon at the end.

Is BH3 positive or negative?

The blue zones on the BH3 and AlH3 potential maps show that these atoms are electron-poor and (partially) positively charged.