Proton magnetic resonance study of the exchange of trimethyl phosphate on the tetrakis(trimethyl phosphato)beryllium(II) complex
- 1 January 1973
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 20,p. 2075-2078
- https://doi.org/10.1039/dt9730002075
Abstract
The exchange of trimethyl phosphate in the complex [Be{(MeO)3PO}4]2+ is characterised by the rate law (i), Rate = 4kex[Be{(MeO)3PO}4 2+](i), where kex(298 K)= 3·6 ± 0·6 s–1, ΔH‡= 56·9 ± 4·2 kJ mol–1, and ΔS‡=–43·9 ± 12 ± 6 J K–1 mol–1 are typical values observed in the presence of methylene chloride diluent. The observed zero-order exchange-rate dependence on the concentration of free trimethyl phosphate is considered symptomatic of a dissociative trimethyl phosphate exchange mechanism.Keywords
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