Solvent, salt and high pressure effects on the rate and equilibrium constants for the formation of tri-n-butylphosphoniumdithiocarboxylate

Abstract

Solvent, salt and high pressure effects on the rate and equilibrium constants for the formation of tri-n-butylphosphoniumdithiocarboxylate at 298.2 K are reported. This equilibrium is shifted to the phosphobetaine in polar solvents, salt solutions and under high external pressure. The reaction volume changes dramatically on going from less polar diethyl ether (-69 cm3 mol-1) and tetrahydrofurane (THF) (-66 cm3 mol -1), to more polar acetonitrile (-39 cm3 mol-1) and acetone (-38 cm3 mol-1). Copyright © 2010 John Wiley & Sons, Ltd.