Diarylallenylidene(pentacarbonyl)-chromium and -tungsten complexes, (CO)5MCCCR2 (M W (1), Cr (2)), react with amines, imines and hydrazines by addition of the nitrogen nucleophile to the Cα allenylidene atom. With NEt3 the adduct formation is reversible. With secondary and primary amines, imines and hydrazines, the initially formed N-ylide complexes react readily further to give carbene, azetidinylidene
Diarylallenylidene(五羰基) -
铬-
钨和配合物,(CO)5 MCCCR 2(MW(1),CR(2)),通过添加氮亲核与胺,
亚胺和
肼反应到C α allenylidene原子。对于NEt 3,加合物的形成是可逆的。与仲胺和
伯胺,
亚胺和
肼一起,最初形成的N- yy配合物容易进一步反应,分别得到卡宾,
氮杂环丁二烯和腈配合物。例如,(a)1和2与HNEt 2或H 2 NPh的反应生成烯基(
氨基)卡宾络合物(CO)5 MC[C(H)CR 2 ] NR' 2(3-5); (b)的1和2与HNCR 2给出烯基(alkylideneamino)卡宾配合物,(CO)5 MC[C(H)CR 2 ] [NCR' 2 ](6,7); (c)1与(i Pr)NC(Ph)H的
氮杂环丁二烯配合物9;的(d)1与1,2-二取代的
肼,如H(Me)的NN(R)H(RMe中,PH)链烯基(
肼基)卡宾配合物,(CO)5