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~ION\ / CH3 The crystal structure of dimethylglyoxime C--C has been determined by singleCH, / ~ N O H crystal methods. The unit cell is triclinic with a=6-10, b----6.30, c----4-48 _~, a----122 ° 31', fl-----90 ° 6', F----79 ° l ' . The space group is PT-G~ and there is one molecule per unit cell. Atomic positions were determined by two-dimensional Fourier refinement and by further threedimensional refinements by the method of least squares. Structure factors were obtained from visually estimated intensities on Weissenberg photographs taken with Cu K s radiation. The crystal is composed of chains of essentially planar, centro-symmetric dimethylglyoxime molecules joined together by a network of hydrogen bonds. The bond lengths are normal except for the central carbon-carbon bond (1.44 ~). |
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