Hydrazinocarben-Metallkomplexe—synthese aus allenylidenkomplexen und hydrazinen, umlagerung und cyclisierung
作者:Helmut Fischer、Gerhard Roth
DOI:10.1016/0022-328x(94)05187-g
日期:1995.3
The diarylallenylidene pentacarbonyl complexes (CO)5M=C=C=C(C6H4NMe2-p)2 (M = W (1), Cr (2)) add 1,2,-disubstituted hydrazines RNH-HNR to form alkenyl hydrazino carbene complexes (CO)5M=C(C(H)=C(C6H4NMe2-p)2) NR-N(H)R (M = W, R = Bn (3b), iPr (3c), cHex (3d); M = Cr, R = Me (4a), iPr (4b)) in good yield. 3c and 4b are formed selectively as E-conformers (E arrangement of NβHR and (CO)5M with respect
二芳基亚烯基五羰基配合物(CO)5 M = C = C = C(C 6 H 4 NMe 2 - p)2(M = W(1),Cr(2))添加1,2,-二取代肼RNH-HNR形成烯基肼基卡宾络合物(CO)5 M = C(C(H)= C(C 6 H 4 NMe 2 - p)2)NR-N(H)R(M = W,R = Bn(3b) ,i Pr(3c),c Hex(3d); M = Cr,R = Me(4a),i Pr(4b)))。图3c和图4b有选择地形成作为ë -conformers(Ë N中的排列β HR和(CO)5相对于所述C(碳烯)-N中号α键)。相反,所有其他3和4的衍生物都是E / Z-异构体的混合物。加热时,E-3a和E-3b重排,得到丙烯am配合物(CO)5 W-NR = C(NHR)C(H)= C(C 6 H 4 NMe 2 - p)2(R = Me(5a),Bn(5b)。通过X射