Abstract
The characteristic features of the electronic structure of SbCl5L complexes has been studied in comparison with those of the SnCl4L2 and TiCl4L2 complexes. The results of X-ray structural analysis were correlated with the heats of complexation, the data of Mössbauer spectroscopy, derivatography, quantum-chemical PM3 calculations, and stretching frequencies of the donor-acceptor bonds. Based on these data, the contributions of different effects to the stabilities of complexes were determined, complexation enthalpies previously unknown were calculated, and a conclusion was drawn that the electron density transfer from the donor to the acceptor is small. The charge effect of the donor consists primarily in polarization of the acceptor bonds; this polarization decreases as a result of (he change in the geometry of the acceptor upon complexation. The relative stabilities of the complexes with dimethyl sulfide were determined using a unique internal standard technique.
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Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 6, pp. 1465–1470, June, 1996.
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Dolenko, G.N., Poleshchuk, O.K., Elin, B.P. et al. Study of charges on heteroatoms in organic compounds of the second-row elements by X-ray fluorescence spectroscopy. Russ Chem Bull 45, 1394–1399 (1996). https://doi.org/10.1007/BF01434219
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DOI: https://doi.org/10.1007/BF01434219