Transition metal boryl complex

[1] They have the formula LnM-BR2 or LnM-(BR2LB) (L = ligand, R = H, organic substituent, LB = Lewis base).

[2] Such compounds, especially those derived from catecholborane and the related pinacolborane, are intermediates in transition metal-catalyzed borylation reactions.

Oxidative addition is the main route to metal boryl complexes.

For example, catecholborane oxidatively adds to Pt(0) to give the boryl hydride.

[4] Addition of diboron tetrafluoride to Vaska's complex gives the triboryl iridium(III) derivative:

Structure of boryl ligands in metal complexes.
Structure of ( PMe 3 ) 4 RhB( pinacolate ). [ 3 ] (color code: pink=B, blue green=Rh, red=O, orange=P).