Abstract
The crystal structure of two isomeric oximes, C11N10N2OS have been studied by X-ray diffraction. The open-chain thiocyanato derivative is somewhat'less dense and crystallizes with the orthorhombic space group Pbcn;a,b,c=18.718(1), 10.601(3), 11.528(1) A,Z=8. The heterocyclic isomer occurs as pseudo-orthorhombic (Cmma)twinned crystals of space group P21/n, a, b, c, β=12.11(1), 7.46(1), 12.12(1) A, 100.09(1)o,Z=4. Twinning occurs as a result of the near-equality of the monoclinica andc cell constants.
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