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Tetraalkylammonium bromides in methanol: small angle neutron scattering and vapor pressure measurements

Barthel, Josef ; Klein, L. ; Kunz, Werner ; Calmettes, P. ; Turq, P.


Vapor pressure measurements and small angle scattering (SANS) expts. are reported and discussed for bispiperidinium (BP) bromide and n-tetrapentylammonium bromide solns. in methanol at 25°C. The BP+ ion which may be considered as a tetraalkylammonium (TAA) ion with pairwise connected alkyl chains, is used for the study of the effects due to flexible TAA alkyl chains. SANS intensities are calibrated with the help of the precise osmotic coeffs. from the vapor pressure measurements.

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