The crystal and molecular structure of carbonatodiamminecopper(II), Cu(NH3)2CO3

The crystal and molecular structure of potassium pentachloronitrosylruthenate(II), K2[Ru(NO)Cl5]

“…Hence, no crystallographic symmetry need be imposed on monomeric species in the cell. Intensity data were collected at 24°C with the wavelength assumed as 2(Mo K~)= 0.7093 .A using a Picker four-circle automatic diffractometer as previously described (Meyer, Singh, Hatfield & Hodgson, 1972). A unique data set having 20<60 ° was gathered; a total of 1797 independent intensities was recorded.…”

Aza analogs of nucleic acid constituents. IV. The crystal and molecular structure of 6-azauracil

“…The positional parameters obtained as above and individual isotropic temperature parameters for all C, N and O atoms in the molecule were refined by fullmatrix least-squares calculations to the usual discrepancy values R=~, [IFo[-[Fc[[/~IFo[ and Rw=[w(lFol- (Zachariasen, 1968) as described elsewhere (Meyer, Singh, Hatfield & Hodgson, 1972) yielded the final discrepancy values R--0.037 and Rw=0"059. In the final cycle, no parameter experienced a shift of greater than 0.4 times its e.s.d.…”

The crystal structure of 8-aza-2,6-diaminopurine sulfate monohydrate

“…All the non-hydrogen atoms were refined with anisotropic thermal parameters and the hydrogen atoms with isotropic thermal parameters. A small correction for the secondary extinction effect was deemed necessary near the end of the refinement process and was included in a manner described elsewhere (Meyer, Singh, Hatfield & Hodgson, 1972) using the expression given by Zachariasen (1968) for a spherical crystal. [w(IFol -IFcl) Z/n -v] l/z, where n is the number of independent observations and v the number of variables) was 1.6, and the value of the extinction coefficient was 2.2 (9)x 10 -8.…”