Complex of potassium thiocyanate and dibenzo[<i>b</i>,<i>q</i>][1,4,7,10,13,16,19,22,25,28]decaoxacyclotriacontane (dibenzo-30-crown-10)

Abstract

C28H40KO+0.SCN - is monoclinic, Cc, with a = 18.749 (3), b = 9.808(2), c = 17.681 (4) A, fl = 98.64 (2) ° , V=3214(1) A 3,Z=4,D c= 1.31, D m= 1.29 (2) Mg m -a (flotation in heptane-CCl 4 solution), M r = 633.8, m.p. = 411-412 K, F(000) = 1344,/~(Mo Ka) = 0.294 mm -l. The structure has been determined by direct methods and refined to R = 0.030 for 1625 observed reflexions. Conformations of three complexes of this thirty-membered polyether and the uncomplexed molecule are compared.