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Abstract
The new original method of the synthesis of N-[difluoro(methyl)silyl]methylcarboxamides and related compounds based on the reaction of alkylation of N-trimethylsilyl derivatives by bifunctional silane ClCH2SiF2Me was use to prepare of N-{[difluoro(methyl)silyl]methyl}-N-methylacetamide, N-{[difluoro-(methyl)silyl]methyl}benzanilide and phenyl-N-phenyl-N-{[difluoro(methyl)silyl]methyl}carbamate. The structures of these compounds confirmed by NMR, FTIR and X-ray analysis. According to X-ray analysis data the lengths of coordination bonds C=O→Si in studied compounds are 1.969, 2.000 and 2.176 Å respectively. The lengths of Si-Fax. comprise 1.686, 1.661 and 1.632 Å respectively. QTAIM analysis was used to estimate the energy of co-ordination bond C=O→Si in these amides. Calculated data shows that its value varies within 14-30 kcal/mol that close to the energy of co-ordination bond in some metal-complexes.
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