Synthesis and characterization of stannanechalcogenones; X-ray structures of [RN(RN)Sn(µ-S)]2 and [(RN)2SnE][RN= CH(SiMe3)C9H6N-8; E = Se, Te]

Abstract

The tin(II) alkyl (R[graphic omitted] 1 [R^N= CH(SiMe₃)C₉H₆N-8] reacts with elemental chalcogens in thf to afford thermally stable dimeric dialkylstannane-thione [R^N(R[graphic omitted](µ-S)]₂2 and monomeric dialkylstannane-selone and -tellurone [(R[graphic omitted]E](E = Se 3, Te 4) in good yields; ¹¹⁹Sn NMR spectra of 3 and 4 display satellites with coupling constants ¹J_{¹¹⁹Sn–⁷⁷Se} 2966.3 Hz and ¹J_{¹¹⁹Sn–¹²⁵Te} 7808.3 Hz; the tin–chalcogen distances from single-crystal X-ray analysis are 2.47 (av.), 2.398 and 2.618 Å for 2, 3 and 4 respectively.