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Licensed Unlicensed Requires Authentication Published by De Gruyter (O) January 13, 2014

Structural systematics of RSn(S 2CN RR″) 2Cl compounds

  • Amirah Faizah Abdul Muthalib , Ibrahim Baba EMAIL logo , Hamid Khaledi , Hapipah Mohd Ali and Edward R. T. Tiekink

Abstract

Three new organotin(IV) structures of general formula RSn(S 2CN RR″) 2Cl, where R′ ≠ R″, namely MeSn · [S 2CN(Me)(Cy)] 2Cl ( 1), MeSn[S 2CN( i-Pr)(CH 2Ph)] 2Cl ( 2) and PhSn[S 2CN(Et)( i-Pr)] 2Cl ( 3) are described. Each structure features tin in a distorted octahedral geometry defined by a C ClS 4donor set as a result of two chelating dithiocarbamate ligands. In all cases the tin-bound carbon and chloride atoms are cis. The shorter Sn–S bond lengths in 3are correlated with the presence of the relatively more electronegative Sn-bound phenyl substituent. The new structures conform to the structural motif adopted by all other compounds with the formula RSn(S 2CN RR″) 2Cl, where R′ = R″, suggesting the unsymmetrical substitution pattern of the dithiocarbamate ligands in the present study does not influence the adoption of this structural motif. The homogeneity in the structural motif notwithstanding, non-systematic variations in geometric parameters are found in these structures indicating an overall influence of crystal packing upon molecular geometry.

Test Abstract

La cuestión de los tipos de corpus y los “géneros discursivos” se ha planteado, en los últimos años y en una serie de trabajos, como una de las variables que pueden influir en el cambio lingüístico. Sin embargo, me parece que el estatus teórico de las tradiciones discursivas se ha de plantear de otra manera: no es “una variable” como otras, sino condición profunda de la producción y recepción de los textos, y cuando investigamos los corpus, estamos mirando textos y no lengua, aunque ambos se suelen confundir.

Received: 2013-7-24
Revised: 2013-8-15
Accepted: 2013-8-29
Published Online: 2014-1-13
Published in Print: 2014-1-1

© 2014 by Walter de Gruyter Berlin Boston

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