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Correlation relationships of 10 topological indices and molar refraction for 47 structurally-complicated organotins which included 16 ionic compounds RmSnX4-m and 31 covalent ones R4Sn that is 41 aliphatic compounds(15 unsaturated and 26 saturated)and 6 aromatic ones were studied.Suitability of these ten topological parameters for describing the structure of elemental organic compounds was then evaluated according to the correlation results.Two lately improved molecular connectivity indices(MCIs)-radius-corrected MCI 1Xr and bond-length-corrected MCI 1Xb were applied and proved to be most suitable for the structure expression in QSA(P)R studies of organotins or other elemental organic compounds.
