Diane Dickie - Flexible coordination of the carboxylate ligand in tin(II) amides and a 1,3-diaza-2,4-distannacyclobutanediyl.

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      Publication Details (including relevant citation   information): Dickie,Diane A., Lee,Peter T. K.,   Labeodan,Ojisamola A., Schatte,Gabriele, Weinberg,Noham,   Lewis,Andrew R., Bernard,Guy M., Wasylishen,Roderick E.,   Clyburne,Jason A. C., Dalton Trans.,   2007 (27), pp 2862-2869

      Abstract: Tin(II) amido complexes possessing   m-terphenyl carboxylate ligands were prepd. These complexes,   [(Me3Si)2NSn(μ-O2CC6H2Ph3)]2, [(Me3Si)2NSn(μ-O2CC6H3Mes2)]2, and   [(Me3Si)2NSn(μ-O2CC6H2Mes2Me)]2 [Mes = 2,4,6-trimethylphenyl],   are the first structurally characterized examples of tin(II)   carboxylate complexes exhibiting discrete Sn2O4C2 heterocyclic   cores. Initial reactivity studies gave a   1,3-diaza-2,4-distannacyclobutanediyl,   [(Mes2C6H3CO2)Sn(μ-NSiMe3)]2. This mol. possesses a Sn2N2   heterocyclic core and it was crystd. as both the CH2Cl2 and Et2O   solvates. Although the Sn atoms in this mol. have a formal oxidn.   state of 3+, preliminary computational studies on this mol.   suggest that it is best described as a ground state singlet.   Finally, the x-ray crystal structure of   (CH2Cl)(Cl)Sn[N(SiMe3)2]2, the product of oxidative addn. of   CH2Cl2 to Sn[N(SiMe3)2]2, is also presented herein. [on   SciFinder(R)]

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