CRYSTAL AND MOLECULAR-STRUCTURE OF SODIUM DODECYL(OXYETHYLENE)SULFATEHYDRATE

The crystal and molecular structure of sodium dodecyl(oxyethylene)sulf ate hydrate (C12H25(OC2H4) OSO3(-). Na+. 3/8H(2)O) has been determined by direct methods. The title compound crystallizes in the triclinic s pace group P (1) over bar with a = 9.348(8) Angstrom, b = 11.260(8) An gstrom, c = 38.14(2) Angstrom, alpha = 85.35(5)degrees, beta = 86.38(6 )degrees, gamma = 70.76(8)degrees, V = 3775(5) Angstrom(3), Z = 8, D-x = 1.194 Mgm(-3). There are four oxyethylene sulfate anions, four sodi um cations and 1.5 H2O molecules in the asymmetric unit. They form bil ayers with tail to tail arrangement. The chains of the molecules are m ore or less disordered.