Abstract

M r = 390.44, monoclinic, space group P21/a, a = 17.423 (9), b = 15.089 (3), c= 7.582 (2) A, /~= 112.96 (4) °, V= 1835.36/k 3, Z = 4, D x = 1.337 g cm -3, 2(Mo Kcr) = 0.71069 A,/~ = 2.36 cm -1, F(000)= 824, T= 153 K. Final R =0.051 for 1663 observed reflections. The atoms forming the thiourea system are coplanar. The 1,3,2-dioxaphosphorinane ring has a chair conformation with the N atom in an equatorial position. There is an intramolecular hydro- gen bond between the phosphoryl O atom and the secondary N atom.

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