Quantum-Chemical Study of Adducts of Silicon Halides with Nitrogen-Containing Donors: V. Adducts with 2,2'-Bipyridine and 1,10-Phenanthroline |
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Authors: | Davydova E. I. Timoshkin A. Yu. Sevast'yanova T. N. Suvorov A. V. Schaefer H. F. |
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Affiliation: | (1) St. Petersburg State University, St. Petersburg, Russia |
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Abstract: | Structural and thermodynamic characteristics of adducts of silicon tetrahalides with 2,2'-bipyridine and 1,10-phenanthroline were calculated by the DFT B3LYP method. The enthalpies of sublimation of SiCl4·2,2'-bipyridine, reconstruction energies for donor and acceptor fragments, and energies of Si-N bonds in the complexes under consideration were estimated using the data obtained. These characteristics were compared with similar data for pyridine complexes. The chelate effect on the energy of Si-N bonds upon replacement of pyridine by 2,2'-bipyridine and 1,10-phenanthroline was discussed. The significant reconstruction of the bidentate donor upon the complex formation levels off the chelate effect. |
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