Group phosphinidene carbene complex

Phosphinidenes differ from carbenes because of the additional lone pair. This lone pair enables interactions with, e.g., a transition metal group for increased stability, while maintaining carbene-hke behavior. These terminal /] -complexed phosphinidenes differ from the p2-> fi3-> and p4-complexes, which are not part of this survey. Phosphinidenes that are stabilized by a transition metal group also relate to carbene complexes. A distinction in Fischer and Schrock-type complexes has been advanced to distinguish phosphinidene complexes with nucleophilic properties from those that are electrophiHc [ 13 ]. In this survey we address this topic in more detail. 

An aminophosphinidene complex Cp Os(CO)2 PCl(N-Tr2) was prepared by reaction of [Cp Os(CO)2] with Tr2NPCl2. As with Fischer carbenes (see Fischer-type Carbene Complexes), the nitrogen group stabilizes the electron-deficient phosphorus atom of the phosphinidene ligand. Based on a crystal structure of the ruthenium analog, there is likely... 

This area continues to generate interest across the range of p -bonded phosphorus compounds. Whereas long-established topics such as the chemistry of diphosphenes and phosphaall nes have again received comparatively little study, the chemistry of phosphaalkenes (and related P=C=X compounds), and the less-developed groups of low coordination number phosphorus compounds, in particular phosphenium ions, phosphinidenes, and their complexes with carbenes and metal ions, has again dominated the area. 

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