Organometalic compound Organoboranes Reaction and Mechanisms

Organometalic compound 

Organoboranes Preparation, Reaction and Mechanisms

Organoboron compounds (organoboranes) are organic derivatives of borane (BH3) and contain carbon-boron bonds.

Organoboranes can be monoalkyl, dialkyl or trialkyl depending on the number of alkyl groups attached to boron . For the dialkyl and trialkylboranes, the alkyl groups may be the same or different.

  

Bonding and Structure of Organoboranes

The C-B bond in organoboranes has low polarity (the difference in electronegativity 2.55 for carbon and 2.04 for boron), and therefore alkyl boron compounds are generally covalent. 

 

Synthesis of Organoboranes

1. Hydroboration Of alkenes
2. Borylation of aryl halides
3. Transmetallation

 1. Hydroboration Of alkenes

Hydroboration is addition of borane (BH3) to the double or triple bond to form either alkylboranes or alkenylboranes respectively. Reaction is carried out in THF solvent.

1. Organoboranes- Carbonylation 

The reaction of organoboranes with carbon monoxide is caebonylation