Diphosphabenzenes V 5,5′-(1,ω-Alkanediyl)-bisλ5-[1,3]diphosphinines. A new ethynyl-λ5-[1,3]diphosphinine

Add time:08/01/2019    Source:sciencedirect.com

Reaction of 1,1,3,3-tetrakis(dimethylamino)-1λ5,3λ5-diphosphete (1) with 1,4-diphenyl-1,3-butadiyne, 1,5-hexadiyne and 1,7-octadiyne yields octa-N-methyl-5-phenyl-4-(phenylethynyl)-1λ5,3λ5-[1,3]diphosphinine-1,1,3,3-tetramine (2), 5,5′-(1,2-ethanediyl)-bis-octa-N-methyl-1λ5,3λ5-[1,3]diphosphinine-1,1,3,3-tetramine (5), and 5,5′-(1,4-butanediyl)-bis-octa-N-methyl-1λ5,3λ5-[1,3]diphosphinine-1,1,3,3-tetramine (7), respectively. The new products 2, 5 and 7 are characterized by NMR, mass and IR spectra. X-ray structure analyses of 2, 5 and 7 were performed. Compounds 4 and 6 are intermediate products of the reaction of 1 and 1,5-hexadiyne and 1,7-octadiyne, respectively.

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