2,3‐Diboratabutadienes and 2‐Borataallenes

Abstract

Despite a formal negative charge on boron, no LiċB coordination is found in borataallene 1. Instead, the Li ions are coordinated by the aryl C atoms and an allene C atom. In diboratabutadiene 2, one Li ion is also coordinated by aryl C atoms. The other is coordinated by the butadiene unit and two Si methyl groups. Aryl = 2,4,6-Me3C6H2.