CRYSTAL-STRUCTURES OF 2 ISOMERIC OXIMES - (EE)-2-METHYL-3-PHENYL-3-THIOCYANATOPROPENALDOXIME AND (Z)-5-METHYL-6-PHENYL-1,3-THIAZIN-2-ONE OXIME

The crystal structure of two isomeric oximes, C11N10N2OS have been stu died by X-ray diffraction. The open-chain thiocyanato derivative is so mewhat less dense and crystallizes with the orthorhombic space group P bcn; a,b,c = 18.718(1), 10.601(3), 11.528(1) Angstrom, Z = 8. The hete rocyclic isomer occurs as pseudo-orthorhombic (Cmma)twinned crystals o f space group P2(1)/n, a, b, c, beta = 12.11(1), 7.46(1), 12.12(1) Ang strom, 100.09(1)degrees, Z = 4. Twinning occurs as a result of the nea r-equality of the monoclinic a and c cell constants.