COORDINATION CHEMISTRY OF SOME LOW-COORDINATE ORGANOPHOSPHORUS COMPOUNDS OF COORDINATION-NUMBER-2

The structures of transition metal complexes with low coordinate organ ophosphorus compounds are described; these compounds involve diphosphe nes, phosphaethenes, phosphaallenes, phosphabutatrienes, and so on of coordination number 2. They are discussed in terms of X-ray crystallog raphic analysis and P-31 NMR analysis.