An Allene‐analogous Boranylidenephosphane with BP Double Bond: 1,1‐Diethylpropyl(2,2,6,6‐tetramethylpiperidino)‐boranylidenephosphane‐<i>P</i>‐pentacarbonylchromium

Abstract

Cleavage of the B2P2 ring in 1 with [(CO)5Cr(thf)] affords access to the hetero-allene system 2 in 86% yield. Characteristic for 2 are the extremely short BP distance of 1.743(5) Å and the orthogonal arrangement of the N- and P-sub-stituents.