Illustrated Glossary of Organic Chemistry

Borane: Any molecule in which boron has exactly three single bonds. The parent molecule of this series (BH3) is also called borane.



Borane
    
Methylborane
An organoborane
    
Triethylborane
An organoborane






Diborane
   
BH3.THF
   
BH3.S(CH3)2
BH3 may also be encountered as diborane (a BH3 dimer), or as BH3.THF or BH3.S(CH3)2 (Lewis acid-base adducts, where BH3 is the Lewis acid). All of these are useful for hydroboration reactions.