The effect of substituents at a coordinated center on the strength of P ? Sn donor-acceptor bond

Autor: I. Ya. Kuramshin, A. N. Pudovik, I. P. Gol'dshtein, E. N. Gur'yanova, L. V. Kucheruk
Rok vydání: 1978
Předmět:
Zdroj: Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 27:1345-1348
ISSN: 1573-9171
0568-5230
DOI: 10.1007/bf00946867
Popis: 1. The thermodynamic parameters for the complexing of SnCl4 and organotin chlorides with organophosphorus donors satisfy the general linear ΔH° vs ΔS° relation applying to donor-acceptor complexes. 2. The energy of the P → Sn bond in the (C2H5)nSnCl4−n · (C4H9)3P complexes falls off as the number of Cl atoms in the acceptor molecule is reduced. 3. The energy of the P → Sn bond in the SnCl4 · R1R2R3P complexes, and of the O → Sn bond in the SnCl4 · R1R2R3PO complexes, are closely dependent on inductive and resonance effects from the substituents R1, R2, and R3. The sensitivity of the coordination centers to substituent effects is higher in the phosphines than in the phosphine oxides.
Databáze: OpenAIRE
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