1,1,3,3-Tetrakis(dimethylamino)-1λ5,3λ5-diphosphete, (1), reacts with 2-cyano-pyridine to yield 6- pyridyl-1-aza-2λ5,4A5-diphosphinine (3). 3 is characterized by its 1H , 31P, and 13C NMR, mass, and IR spectra as well as the results of the X-ray structure analysis.
2,2,4,4-Tetrakis-(dimethylamino)-6-amino-1-aza-2λ5,4λ5-diphosphinine (3) has been prepared by reacting 1,1,3,3-tetrakis(dimethylamino)-1λ5-3λ5-diphosphete (1) with bis(trimethylsilyl) carbodiimide (2) in a 2 : 1 molar ratio. Properties, 1H, 31P, and 13C NMR, mass, and IR spectra are reported and discussed. Compound 3 is further characterized by X-ray structure analysis.
Preparation and properties of a coordination compound are described, in which a carbonyl group in bis[(dicarbonyl)(μ5-cyclopentadienyl)iron] is substituted by hitherto unknown octa- N-methyl-2λ3,4λ5-[1,2,4]-oxadiphosphinine-2,4,4,6-tetramine (2). The 1H , 31P, and 13C NMR spectra are recorded and discussed in detail. The molecular structure of the iron complex 4 is described and interpreted.