Cationic Tungsten Oxo Alkylidene <i>N</i>-Heterocyclic Carbene Complexes via Hydrolysis of Cationic Alkylidyne Progenitors
作者:Philipp M. Hauser、Janis V. Musso、Wolfgang Frey、Michael R. Buchmeiser
DOI:10.1021/acs.organomet.1c00035
日期:2021.4.12
5-bis(trifluoromethyl)phenyl) is presented. Addition of 1 equiv of water to cationic tungsten benzylidyne and neopentylidyne NHC complexes results in the formation of the corresponding cationic tungsten oxo alkylidene complexes; however, only the resulting neopentylidene complexes were isolated as stable compounds and tested in selected olefin metathesis reactions. Interestingly, even though a strongly
通式为[W(CR)X 2(NHC)(t BuCN)y + B(Ar F)4 –的阳离子钨亚烷基N-杂环卡宾(NHC)配合物的路线(R = t Bu,C 6 H 4 -4-OMe; X = Br,Cl,OTf; NHC = 1,3-二烯丙基-1,3-二氢-2 H-咪唑-2-亚烷基,IMes; 1,3-双(2,6-二异丙基苯基)-1,3-二氢-2 H-咪唑-2-亚烷基,IDipp; 1,3-二甲磺酰基-4,5-二氯-1,3-二氢-2 H-咪唑-2-亚甲基,IMesCl 2 ; y = 1,2; Ar F= 3,5-双(三氟甲基)苯基)。向阳离子钨苄基炔和新戊基炔NHC络合物中添加1当量的水会形成相应的阳离子钨氧代亚烷基络合物;然而,只有所得的新亚戊二烯配合物被分离为稳定的化合物,并在选定的烯烃复分解反应中进行了测试。有趣的是,即使NHC形式的强碱性配体与金属中心配位,该键也不受与1当量水反应的