Carbometalation of a Stiba-alkene Resulting in an In(III)/Sb(III) C-Centered Geminal Organodimetallic Complex

The stiba-alkene nature of the red oil produced from the 2:1 reaction of [2-Pyr(SiMe3)2CLi·tmeda] (Pyr = C5H4N) with SbCl3 has been confirmed by mass spectrometry. The low-temperature addition of Et3In to a hexane solution of the stiba-alkene, [2-Pyr(SiMe3)2CSbC(SiMe3)2-Pyr], results in the first structurally authenticated In(III)/Sb(III) carbon-centered geminal organodimetallic complex, via carbometalation at the SbC double bond.