Synthesis and characterization of some organotin(IV) adducts containing a related series of pyridines: Crystal structure of [SnMe2Cl2(bu2bpy)] |
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Authors: | Badri Z Momeni Soheila Shahbazi Hamid Reza Khavasi |
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Institution: | 1. Department of Chemistry, K.N. Toosi University of Technology, P.O. Box 16315-1618, Tehran 15418, Iran;2. Department of Chemistry, Shahid Beheshti University, G. C., Evin, Tehran 1983963113, Iran |
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Abstract: | Organotin(IV) complexes of SnR(4−n)Cln] (n = 2, R = Me, nBu; n = 1, R = Ph) react with the bidentate pyridyl ligand 4,4′-di-tert-butyl-2,2′-bipyridine (bu2bpy) to give hexa-coordinated adducts with the general formula SnR(4−n)Cln(bu2bpy)]. However, the reaction of these organotin(IV) complexes with the corresponding monodentate ligand 4-tert-butylpyridine (bupy) resulted in the formation of the hexa-coordinated complex SnMe2Cl2(bupy)2] and the penta-coordinated complexes SnR(4−n)Cln(bupy)] (n = 2, R = nBu; n = 1, R = Ph). Moreover, the reaction of the above organotin(IV) complexes with 4,4′-trimethylenedipyridine (tmdp) yields hexa-coordinated adducts with the general formula SnR2Cl2(tmdp)] (R = Me, nBu) and the penta-coordinated complex ClPh3Sn-μ-(tmdp)SnPh3Cl] in the solid state. The resulting complexes have been characterized by multinuclear NMR (1H, 13C, 119Sn) spectroscopy and elemental analysis. NMR data shows that the triphenyltin(IV) adducts are not stable in solution and dissociate to give tetra-coordinated tin(IV) complexes. The X-ray crystal structure determination of SnMe2Cl2(bu2bpy)] reveals that the tin atom is hexa-coordinated in an octahedral geometry with a trans-SnMe2] configuration. |
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Keywords: | Organotin Adduct Spectroscopy Crystal structure Geometry |
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