Reactivity of a tin(II) (Iminophosphinoyl)(thiophosphinoyl)methanediide complex toward sulfur : synthesis and 119Sn Mössbauer spectroscopic studies of [{(μ-S)SnC(PPh2═NSiMe3)(PPh2═S)}3Sn(μ3-S)]

• Main Authors: Guo, Jia-Yi, Xi, Hong Wei, Nowik, Israel, Li, Yongxin, Lim, Kok Hwa, So, Cheuk-Wai, Herber, Rolfe H.
• Other Authors: School of Chemical and Biomedical Engineering
• Format: Article
• Language: English
• Published: 2013
• Online Access: https://hdl.handle.net/10356/96723; http://hdl.handle.net/10220/11593
• Institution: Nanyang Technological University

Reaction of [(PPh2═NSiMe3)(PPh2═S)CSn:]2 (1) with elemental sulfur in toluene afforded [{(μ-S)tiebar above startSnIVC(PPh2═NSiMe3)(PPh2═S)}3SnII(μ3-Stiebar above end)] (2) and [CH2(PPh2═NSiMe3)(PPh2═S)] (3). Compound 2 comprises a SnIIS moiety coordinated with the SnIV and S atoms of a trimeric 2-stannathiomethendiide {(PPh2═NSiMe3)(PPh2═S)CSn(μ-S)}3. Compound 2 has been characterized by NMR spectroscopy, 119Sn Mössbauer studies, X-ray crystallography, and theoretical studies. 119Sn NMR spectroscopy and Mössbauer studies show the presence of SnIV and SnII atoms in 2. X-ray crystallography suggests that the SnIIS moiety does not have multiple bond character. Theoretical studies illustrate that the Cmethanediide–Sn bonds comprise a lone pair orbital on each Cmethanediide atom and an C–Sn occupied σ orbital.