Article ID Journal Published Year Pages File Type
1299762 Coordination Chemistry Reviews 2012 21 Pages PDF
Abstract

Can we classify planar M–PR2 complexes in the same way as we do planar M–CR2 complexes? The short answer is “yes”. This review attempts a longer answer. The analogy between phosphenium ligands, PR2+, and Fischer carbenes is well established, but a broader analogy includes comparison of planar phosphido ligands, PR2−, with Schrock carbenes. Examples of complexes of planar PR2 ligands from across the transition series are categorized as “phosphenium” or “planar phosphido” in character, based on their structures, reactivities, and/or syntheses. Also presented are complexes with structures and behaviours that lie between these two extremes.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (89 K)Download as PowerPoint slideHighlights► Planar M–PR2 complexes can be classified in the same way as planar M–CR2 complexes. ► Phosphenium ligands (PR2+) are compared with Fischer carbenes. ► Planar phosphido ligands (PR2−) are compared with Schrock carbenes. ► This useful analogy is complicated by the extra valence e− at P relative to C. ► Structure and reactivity of these complexes may lie between the two extremes.

Related Topics
Physical Sciences and Engineering Chemistry Inorganic Chemistry
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