Abstract
The enthalpies of solution of some tetra-alkylammonium salts and of tetraphenylphosphonium bromide in hexamethylphosphotriamide (HMPT) at 298.15 K have been obtained. Ionic enthalpies of transfer from water to HMPT and from HMPT to propylene carbonate (PC) have been calculated on the basis of the extrathermodynamic assumption ΔH°tr(Ph4As+)=ΔH°tr(BPh–4). The results indicate that this assumption is valid for enthalpies of transfer from HMPT to PC, but not for transfer from water to HMPT. The enthalpies of transfer of tetra-alkylammonium ions from HMPT to PC are discussed in terms of the ability of HMPT to solvate alkyl chains.
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Schedule a callMore From: Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases
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