1,3-Dipole behavior of phosphagermaallene tip(tBu)Ge-C-PMes* leading to a phosphagermaheterocyclic carbene
Résumé
A cyclic phosphagermacarbene is formed by a [3+2] cycloaddition between the 1,3-dipolar Ge-C-P unit of a phosphagermaallene and an acetylene (see scheme; Tip=2,4,6-iPr3C6H3). The carbene undergoes C-H insertion or is trapped by a second equivalent of acetylene derivative, and its existence and reactivity was supported by DFT calculations. © 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.