Reduction–oxidation properties of organotransition-metal complexes. Part 10. Formation and reactivity of the paramagnetic cyclobutadiene-iron and -ruthenium derivatives [M(CO)<sub>3–n</sub>L<sub>n</sub>(C<sub>4</sub>Ph<sub>4</sub>)]<sup>+</sup>(n= 1–3, L = phosphorus donor)
作者:Neil G. Connelly、Raymond L. Kelly、Mark W. Whiteley
DOI:10.1039/dt9810000034
日期:——
[2: M = Fe, n= 1, L = PPh3; M = Fe, n= 2, L = P(OMe)3]. Complexes (2) are implicated as intermediates in the formation of [Fe(CO)(NO)P(OMe)3}(η4-C4Ph4)]+ from [Fe (CO)P(OMe)3}2(η4-C4Ph4)] and Ag[NO3], of [Fe(CO)P(OMe)3}(η2-tcne)(η4-C4Ph4)](3) from tetracyanoethylene (tcne) and [Fe(CO)P(OMe)3}2(η4-C4Ph4)], and of [MX(CO)3–nLn(η4–C4Ph4)]+[4; X = Cl, Br, or I] from (1) and halogens, X2. The reaction
所述tetraphenylcyclobutadiene络合物[M(CO)3- ñ大号Ñ(η 4 -C 4博士4)] [1:M =铁,Ñ = 1,L = PPH 3或P(OME)3 ; M = Fe,n = 2,L = P(OMe)3;M = Ru,n = 2或3,L = P(OMe)3 ]在CH 2 Cl 2中的铂电极上进行可逆的单电子氧化,得到顺磁自由基阳离子[M(CO)3- n L n(C 4 Ph 4)] +(2)。在CH 2 Cl 2中用Ag [BF 4 ]或[N(C 6 H 4 Br- p)3 ] [PF 6 ]化学氧化(1)得到[2:M = Fe,n = 1,L = PPh 3;M = Fe,n= 2,L = P(OMe)3 ]。配合物(2)被暗示为形成中间体的[Fe(CO)(NO)P(OME)3 }(η 4 -C 4博士4)] +从的[Fe(CO)P(OME)3 } 2(η