TY - JOUR
T1 - Molar Refractivities of Tetra-n-Alkylammonium Salts and Ions
AU - Softer, Neoml
AU - Bloemendal, Michael
AU - Marcus, Ylzhak
PY - 1988/9/1
Y1 - 1988/9/1
N2 - The refractive index and density of dilute solutions of tetra-n-alkylammonium bromides in water and in N,N-dlmethylformamlde (DMF) were measured at 298.15 K. The following values of the Infinite dilution molar refractivities (In cm3 mol-1) were found: NH4Br 15 ± 2, (CH3)4NBr 36 ± 2, (C2H5)4NBr 47 ± 1, (C2H5)4NI 61 ± 2, (C3H7)4NBr 73 ± 2 (In water) and 88 ± 2 (In DMF), (C4H9)4NBr 91 ± 2 (In both solvents), (C5H11)4NBr 108 ± 2 (In water) and 110 ± 2 (In DMF), (C6H13)4NBr 128 ± 3, and (C7H13)4NBr 150 ± 3. They yield a slope of 19.0 cm3mol-1per four methylene groups added in the alkyl chains, when plotted against the length of the latter. The calculated polarizabilities of the cations are proportional to their van der Waals volumes.
AB - The refractive index and density of dilute solutions of tetra-n-alkylammonium bromides in water and in N,N-dlmethylformamlde (DMF) were measured at 298.15 K. The following values of the Infinite dilution molar refractivities (In cm3 mol-1) were found: NH4Br 15 ± 2, (CH3)4NBr 36 ± 2, (C2H5)4NBr 47 ± 1, (C2H5)4NI 61 ± 2, (C3H7)4NBr 73 ± 2 (In water) and 88 ± 2 (In DMF), (C4H9)4NBr 91 ± 2 (In both solvents), (C5H11)4NBr 108 ± 2 (In water) and 110 ± 2 (In DMF), (C6H13)4NBr 128 ± 3, and (C7H13)4NBr 150 ± 3. They yield a slope of 19.0 cm3mol-1per four methylene groups added in the alkyl chains, when plotted against the length of the latter. The calculated polarizabilities of the cations are proportional to their van der Waals volumes.
UR - http://www.scopus.com/inward/record.url?scp=0010935893&partnerID=8YFLogxK
U2 - 10.1021/je00051a015
DO - 10.1021/je00051a015
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AN - SCOPUS:0010935893
SN - 0021-9568
VL - 33
SP - 43
EP - 46
JO - Journal of Chemical and Engineering Data
JF - Journal of Chemical and Engineering Data
IS - 1
ER -