Zwitterionic Alkali-Metal Silanides of Tripodal Ligand Geometry: Synthesis, Structure, and Lewis Acid–Base Chemistry
作者:Vidura D. Thalangamaarachchige、Hui Li、David B. Cordes、Daniel K. Unruh、Clemens Krempner
DOI:10.1021/acs.inorgchem.7b01227
日期:2017.8.21
zwitterions. The reaction of Si(SiMe2OCH2CH3)3Li (Li-3b) with BPh3 in THF gave the zwitterionic Lewis acid–base complex Ph3BSi(SiMe2OCH2CH3)3Li·THF (Li-5b). Reactions of W(CO)6 with Li-3b–d and Na-3b,c resulted in the formation of the zwitterionic silyl tungstenate complexes (CO)5WSi[SiMe2OCH2CH3]3Li (Li-6b), (CO)5WSi[SiMe2OCH(CH3)2]3Li (Li-6c), (CO)5WSi[SiMe2OCH2CH(CH3)2)]3Li (Li-6d), (CO)5WSi(SiMe2OCH2CH3)3Na
独特的两性离子碱金属硅化物,通式为[Si(SiMe 2 OR)3 M](M- 3),其中M = Li,Na,K和R = CH 2 CH 3(M- 3b),CH (CH 3)2(M- 3c),CH 2 CH(CH 3)2(M- 3d),CH 2 CH 2 OSCH 3(M- 3g),CH 2 CH 2 N(CH 3)2(M- 3小时),已经合成并充分表征了其结构。化合物M- 3由相应的碱金属醇盐R'OM(R'= Bu t,Bu i; M = Li,Na,K)与硅烷Si(SiMe 2 OR)4(2a – h),其中R = CH 2 CH 3(b),CH(CH 3)2(c),CH 2 CH(CH 3)2(d),CH 2 CH 2 OSCH 3(g),CH2 CH 2 N(CH 3)2(h),通过选择性的Si-Si键裂解。Li- 3a - e,g,Li- h,Li- 4,Na- 3a - c,e,f,h和K-