Synthesis and structures of bis[bis(trimethylsilyl)amido]-tin(<scp>IV</scp>) cyclic chalcogenides [{Sn[N(SiMe<sub>3</sub>)<sub>2</sub>]<sub>2</sub>(µ-E)}<sub>2</sub>] and a heterobimetallic analogue [{(Me<sub>3</sub>Si)<sub>2</sub>N}<sub>2</sub>Ge(µ-Te)<sub>2</sub>Sn-{N(SiMe<sub>3</sub>)<sub>2</sub>}<sub>2</sub>](E = S, Se or Te)
作者:Peter B. Hitchcock、Eunseok Jang、Michael F. Lappert
DOI:10.1039/dt9950003179
日期:——
Each of the four-membered ring compounds [Sn[N(SiMe(3))(2)](2)(mu-E)}(2)] (E = S 1, Se 2 or Te 3) has been prepared by the oxidative addition of the chalcogen E to Sn[N(SiMe(3))(2)](2) promoted by sonication in a faster reaction and in a higher yield than previously achieved. The first heterobimetallic analogues [(Me(3)Si)(2)N}Ge-2(mu-E)(2)SnN(SiMe(3))(2)}(2)] (E = Te 4 or Se 5) were obtained similarly from a mixture of the two metal(II) amides and the chalcogen. Compounds 1-4 have been characterised by single crystal X-ray diffraction and 1-5 studied by NMR spectroscopy [H-1, C-13, Si-29, Se-77, Sn-177, Sn-179, Te-125 and (by the insensitive nuclei enhanced by polarization transfer technique) N-15].