Zwitterionic adducts from addition of imines to the α-carbon atom of pentacarbonyl(vinylidene)chromium and -tungsten complexes
作者:Helmut Fischer、Frank Kirchbauer、Angelika Früh、Mokhles M. Abd-Elzaher、Gerhard Roth、Christoph C. Karl、Markus Dede
DOI:10.1016/s0022-328x(00)00789-0
日期:2001.2
as MeNC(Ph)H (5), 2-methyl 4,5-dihydrothiazole (8a), 2-methyl 4,5-dihydrooxazole (8b) and MeNC(OMe)Me (13) add to the α-carbon atom of the vinylidene ligand in [(CO)5CrCCMe2] (4) to give isolable zwitterionic adducts, [(CO)5Cr−–C(CMe2)(Im+)]. The reaction of [(CO)5WCCPh2] (12) with 13 also yields an adduct, [(CO)5W−–C(CPh2)NMeC(OMe)Me}+] (15), whereas from the corresponding reaction of 4 with
亚胺,Im,如MeNC(Ph)H(5),2-甲基4,5-二氢噻唑(8a),2-甲基4,5-二氢恶唑(8b)和MeNC(OMe)Me(13)添加到亚乙烯基配体的α碳原子在[(CO)5 CrCCMe 2 ](4)以得到两性离子可分离加成物,[(CO)5铬- -C(CMe 2)(IM +)]。的反应[(CO)5 WCCPh 2 ](12)与13也产生的加合物,[(CO)5 w ^ - -C(CPh 2)NMeC(OME)我} +](15),而从相应的反应4与xanthylideneimine,H - NC(C 6 H ^ 4)2 O(16),一个碳烯配合物,[(CO)5 CrC(我-Pr) -得到NC(C 6 H 4)2 O](17)。可能通过最初添加16到4并随后快速重排来形成复合物17。在溶液中,加合物[(CO)5铬- -C(CMe 2)(NMeC(PH)H)+