Carbonylvanadates, hydrido- and alkyl-carbonylvanadium complexes containing alkylated oligophosphines as ancillary ligands
作者:Frank Süssmilch、Wolfgang Glöckner、Dieter Rehder
DOI:10.1016/0022-328x(90)85351-x
日期:1990.5
ionic complexes cis-[Et4N][V(CO)4pm] (pm = m-dentate phosphine: Cy2PCH2CH2PCy2; RP(CH2CH2CH2PR2′)2 with R/R′ = Me/Me, Me/Et, Et/Et; P(CH2CH2CH2PEt2)3] have been prepared. Isomers with 6- and 10-membered chelate rings are present in the case of p3 (51V NMR evidence). Ion exchange on silica gel yields HV(CO)4p2, HV(CO)3pm (m = 3, 4), which, for m = 4, can be converted photochemically into cis-[HV(CO)2p4]
离子络合物顺式-[Et 4 N] [V(CO)4 p m ](p m = m-齿状膦:Cy 2 PCH 2 CH 2 PCy 2; RP(CH 2 CH 2 CH 2 PR 2 ')2(R / R'= Me / Me,Me / Et,Et / Et; P(CH 2 CH 2 CH 2 PEt 2)3 ]的制备。在这种情况下,存在具有6-和10-元螯合环的异构体之p 3(511 H NMR证据)。在硅胶上进行离子交换可得到HV(CO)4 p 2,HV(CO)3 p m(m = 3,4),对于m = 4,可以将其光化学转化为顺式-[HV(CO)2 p 4 ]。在1个中所述氢化物区域H NMR图案指示的面部封端的八面体与所述封盖H的行动不便- 。[Et 4 N] [V(CO)4 dppe]与RI(R = Me,i-Pr,t-Bu,SiMe 3)之间的反应导致RV(CO)4 dppe(δ(51 V)-1032至相对于VOCl