Isolation and Characterization of Lewis Base Stabilized Monomeric Parent Stibanylboranes

The synthesis of the Lewis base stabilized monomeric parent compound of stibanylboranes, H2SbBH2, is reported. Through a salt metathesis route, the silyl-substituted compounds (Me3Si)(2)SbBH2LB (LB=NMe3, NHCMe) were synthesized as representatives of derivatives with a SbB sigma bond. Under very mild conditions, they could be transformed into the target compounds Me3NH2BHSbBH2NMe3 and H2SbBH2NHCMe, respectively. The products were characterized by X-ray structure analysis, NMR spectroscopy, IR spectroscopy, and mass spectrometry. DFT calculations give further insight into the stability and bonding of these unique compounds.