Synthesis of a Heterobimetallic Rhodium−Iron Complex Containing an η³-Interaction between Rhodium and the B−Cipso−Cortho Unit of a Triarylborane

Reaction of [{RhCl(CO) 2 } 2 ] with a phosphine/thioether/borane ligand (TXPB) gave [Rh(μ-Cl)(CO)(TXPB)] ( 1 ), a rare example of a complex containing a M−Cl−BR 3 bridging interaction. Reaction of 1 with K[CpFe(CO) 2 ] gave [(TXPB)Rh(μ-CO) 2 Fe(CO)Cp] ( 2 ), which contains an unprecedented η 3 -interaction between rhodium and the B−C ipso −C ortho unit of a triarylborane. DFT calculations suggest a bonding description intermediate between that expected for an isolated borane/alkene complex and a fully delocalized allyl-like complex.