Abstract
The reactions of diorganotin(IV) dichlorides SnR2Cl2 (R = Me, n-Bu) with a series of ligands having N, P, or O donor atoms have been investigated. The reaction of SnR2Cl2 (R = Me, n-Bu) with the bidentate chelating pyridyl ligands of phendione (1,10-phenanthroline-5,6-dione) and ndppz (11-nitrodipyrido[3,2-a:2′,3′-c]phenazine) affords new hexa-coordinated 1:1 adducts with general formula SnR2Cl2L (R = Me, n-Bu; L = phendione, ndppz). On the other hand, SnMe2Cl2 reacted with xantphos [9,9-dimethyl-4,5-bis(diphenylphosphino)xanthene] to yield the hexa-coordinated 1:2 adduct [SnMe2Cl2(xantphos)2] in the solid state. However, it dissociates in solution to give the penta-coordinated 1:1 complex [SnMe2Cl2(xantphos)]. Notably, the analogous n-Bu derivative does not react, even under forcing conditions. Finally, the tin(IV) compounds SnR2Cl2 (R = Me, n-Bu) react with dppap [2-(diphenylphosphinoamino)pyridine] to give the penta-coordinated 1:1 adducts [SnR2Cl2(dppap)] (R = Me, n-Bu). The resulting complexes have been characterized by nuclear magnetic resonance (NMR) spectroscopy and elemental analysis. The X-ray crystal structure determination of [SnMe2Cl2(phendione)] reveals that the compound crystallized with two independent molecules in the asymmetric unit with a trans-[SnMe2] configuration.
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We thank the Science Research Council of K.N. Toosi University of Technology for financial support.
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Momeni, B.Z., Kia, R. & Ghanbarzadeh, S. Reactivity of diorganotin(IV) dichlorides towards N, P, and O donor ligands: crystal structure of [SnMe2Cl2(phendione)]. Monatsh Chem 143, 1479–1486 (2012). https://doi.org/10.1007/s00706-012-0733-5
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DOI: https://doi.org/10.1007/s00706-012-0733-5