1,2-Thiaborolide:  A New Heteroaromatic π-Ligand Containing Boron and Sulfur

The heteroaromatic anion lithium 2-(diisopropylamino)-1,2-thiaborolide (3) has been prepared by a synthesis using the Grubbs ring-closing metathesis. 3 has been converted to the Cp*Ru complex 10, the Cp*ZrCl2 complex 11, and the Me2Si-bridged CpZrCl2 complex 15.