The geometry of cis-l2Sn[S2CN(C2H5)2]2 is confirmed by single crystal X-ray analysis; the spectral data of the complex resemble those of the bromo complex and PM3 calculations on octahedral complexes of the type XYSn[S2CN(C2H5)2]2 reveal that their geometrical preferences depend upon the electron availability on the monodentate ligands X or Y.
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