Zwitterionic Si‐C‐Si‐P and Si‐P‐Si‐P Four‐Membered Rings with Two‐Coordinate Phosphorus Atoms

Abstract

It's hip to be square: The reaction of amidinato chlorosilylene (PhC(NtBu)2SiCl) with adamantyl phosphaalkyne and white phosphorus affords the formation of Si-C-Si-P and Si-P-Si-P (see picture) four-membered rings. Both compounds were characterized by single-crystal X-ray studies and by solution and solid-state NMR spectroscopy. DFT calculations elucidated the bonding situation.