作者:Manuel Alcarazo、Rosa M. Suárez、Richard Goddard、Alois Fürstner
DOI:10.1002/chem.201001779
日期:2010.8.23
intermediates that can be described as push–pull cumulenes or singletcarbenes (see scheme). Whereas the NMR data are ambiguous, the coordination behavior shows the ready availability of a lone pair at the central C atom. The donor ability of singletcarbeneligands of this newclass exceeds that of the commonly used N‐heterocyclic carbenes (NHCs).