114198-75-3Relevant academic research and scientific papers
Synthesis and structure of a diphosphetene, (CF3)P(CF3)PC(SiMe3)=C(SiMe3), and the coordination and metallacycle formation of several diphosphetenes with iridium(I)
Phillips, Ian G.,Ball, Richard G.,Cavell, Ronald G.
, p. 2269 - 2275 (2008/10/08)
New diphosphetenes (CF3)P(CF3)PC(R)=C(R′), 9 (R = R′ = SiMe3), 10 (R = R′ = Ph), and 11 (R = CH3, R′ = SiMe3), have been prepared by the reaction of (CF3P)4,5 and the appropriate alkyne. The first of these has been structurally characterized. For 9 at -65°C (monoclinic C2/c, No. 15): a = 17.057 A?, b = 8.811 A?, c = 11.983 A?, β = 102.13°, and Z = 4. The central P2C2 ring is slightly twisted from planarity (the angle between the PP vector and the CC vector is 12.8°). Major bond lengths are P-P = 2.223 (1) A?, P-Cendo = 1.841 (2) A?, and C-C = 1.356 (3) A?. The new diphosphetenes 10 and 11 and also (CF3)-P(CF3)PC(CF3)=C(CF3) (1) (prepared in 1964 by W. Mahler) react with trans-[IrCl(N2)(PPh3)2] at low temperature to form an η1 (phosphorus) complex, which transforms to a metallacycle with the (Chemical Equation Presented) framework at ordinary temperatures. NMR spectral properties of the diphosphetenes, the η1 complexes, and the metallacycles are given.
