150345-22-5Relevant academic research and scientific papers
Methylenephosphanyl Complexes of Chromium, Molybdenum, Tungsten, Iron and Nickel - Synthesis and Reactivity
Niecke, Edgar,Metternich, Hans-Juergen,Nieger, Martin,Gudat, Dietrich,Wenderoth, Peter,et al.
, p. 1299 - 1310 (2007/10/02)
The reaction of the functionalized P/C double bond systems X-P=C(R)SiMe3 * (5a) or R = Ph and X = Br (1b), Cp* (5b)> with alkali carbonylmetallates or carbonyl complexes of group 6, 8, and 10 metals leads to the formation of the transition metal-substituted phosphaalkenes -P=C(R)SiMe3 3a-j and 4a-j>, in which the P-C fragment acts as a one-electron donor.Depending on the nucleophilicity of the transition metal anion used, but also on the methylene carbon substituents , a different stability of the (methylenephosphanyl)-metal complexes is observed, which results in a broad spectrum of reactivities.As demonstrated by the reactions of the (methylenephosphanyl)metal complexes with sulfonic acid drivatives (10a-c), diverse transition metal complexes (11a-c), as well as chalcogenes (14a-c, 15), a change in the reactivity is observed, indicating a transition from an olefinic to a carbenic character of the methylenephosphane.In comparison to the phenyl-substituted derivatives 4a-i the bis(trimethyl)-substituted species 3a-j exhibit an increased reactivity.This is reflected in the easy decarbonylation of 3a-d to the phosphavinylidene complexes 12a-d.Key Words: Methylenephosphanyl complexes / Phosphenium complexes / Phosphavinylidene complexes
