STRUCTURES OF 2 MODIFICATIONS OF 1-METHYLTHIO-2-METHYLSULFONYLETHANE AT 87-K

C4H10O2S2, M(r) = 154.25, monoclinic, T = 87 (1) K. (alpha) P2(1)/n, a = 10.520(2), b = 5.818(1), c = 12.029(2) angstrom, beta = 92.86(1)-de grees, V = 735.3(2) angstrom3, Z = 4, D(x) = 1.3934(4) Mgm-3, A(MoKalp haBAR) = 0.71073 angstrom, mu = 0.617 mm-1, F(000) = 328, R = 0.023 fo r 2080 reflections. (beta) P2(1)/c, a = 10.413(1), b = 6.706(1), c = 1 0.229(1) angstrom, beta = 94.32(2)-degrees, V = 712.3(2) angstrom3, Z = 4, D(x) = 1.4384(8) Mgm-3, lambda(MoKalphaBAR) = 0.71073 mu = 0.637 mm-1, F(000) = 328, R = 0.021 for 2007 reflections. The main conformat ional distinction between the two forms is the -synclinal and +synclin al orientation of the C(Me)-S-C-C in the thio end of the alpha and bet a forms, respectively. The bond lengths and angles are very similar in the two forms, and in good agreement with some related sulfone and su lfide structures.