The crystal structure of dimethylglyoxime

Reporting and evaluating absolute-structure and absolute-configuration determinations

“…For some classes of protein, structure re®nement is now being carried out to atomic resolution, resulting in interpretable anisotropic atomic displacement parameters (Merritt, 1999). With data of such quality it is clear that anomalous-dispersion effects need to be treated properly (Parkin, 1998).…”

Spectral and kinetic measurements on a series of persistent iminoxyl radicals

“…17,18 Comparisons can be also made with the x-ray crystallographic results on dimethylglyoxime and p-chlorobenzaldoxime. 19,20 Additionally, for H 2 CNO using the UMP2 method, the 6-31g(d) basis reproduces the geometry using the more extensive 6-31 + + G(2df,p) basis; all of the geometrical parameters from the two sets are within 1% of each other. As a check on the effect of the residual electronic correlation, Figure 4 also has the profile for H 2 CNO calculated with the UMP4/6-31G(d)//UMP2/6-31G(d) method.…”

Isomerism of benzoquinone-monoximes (nitrosophenols). VIII. The crystal structure of α-2-chloro- and α-bromo-5-methyl-p-benzoquinone-4-oxime

“…Hydrogen bonds (2.69 /~) which connect the carbonyl group of one molecule with the oxime group of the next molecule act as links in infinite chains. The symmetry elements which evolve this kind of hydrogen-bonded chain are in the case of the crystals of a-C1MBO and 3-chloro-p-benzoquinone-4-oxime a glide plane and in the case of the structures of Fischmann, 1957Jerslev, 1950Meritt & Lanterman, 1952Bierlein & Lingafelter, 1951Bartindale, Crowder & Morley, 1959 a-5-(2'-chloroethoxy)-o-quinone-2-oxime (Romers & Umans, 1960) and a-5-methoxy-o-quinone-2-oxime, a two-fold screw axis. The Van der Waals contacts between the molecules packed on top of each other (not shown in Fig.…”