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The chelating properties of the pentadentate ligand 2,6-diacetylpyridine bis(thiosemicarbazone) hydrochloride, H2daptsc.HCl, have been investigated in a new organotin complex, [PhSnPh(Hdaptsc)]Cl {or [Sn(C6H5)2(C11H14N7S2)]Cl}. The structure determination revealed a monocationic complex consisting of a heptacoordinated SnIV in a distorted pentagonal-bipyramidal geometry, with the thiosemicarbazone derivative acting as a pentadentate species at the equatorial plane and two phenyl groups at trans positions. The chloride acts as a counterion. 119Sn Mössbauer measurements showed that the isomer shift and the quadrupole splitting are consistent with structural interpretation.

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Crystallographic Information File (CIF)
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CCDC reference: 129149

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