2,3-Dimeth­oxy-10-oxostrychnidinium hydrogen oxalate dihydrate

Growth Characterization of Calcium Hydrogen Phosphate Dihydrate, Calcium Oxalate Monohydrate and Struvite Crystals Influenced by Medicinal Plants

(E)-2-(3-Chloro­benzyl­idene)-5,6-dimeth­oxy-2,3-dihydro-1H-inden-1-one

In the title compound, C(18)H(15)ClO(3), the dihydro-indenone group makes a dihedral angle of 8.56 (6)° with the bezene ring. In the crystal, the mol-ecules are inter-connected into a three-dimensional network via inter-molecular C-H⋯O hydrogen bonds. Weak C-H⋯π and π⋯π [centroid-centroid distances 3.6598 (9)-3.6913 (9) Å] inter-actions are also observed.

Bis(l-serinium) oxalate dihydrate: polymorph II

A corrected and improved structure of the polymorph II of 2C3H8NO3 (+)·C2O4 (2-)·2H2O, based on single-crystal data, is presented. The structure is refined with anisotropic displacement parameters for all non-H atoms and all H atoms are located. Due to the charged moieties, the structure is classified as a mol-ecular salt. Inter-molecular O-H⋯O(-), O-H⋯O and N(+)-H⋯O(-)hydrogen bonds link the c...

Poly[[di-μ3-nicotinato-μ3-oxalato-samarium(III)silver(I)] dihydrate]

In the title three-dimensional heterometallic complex, {[AgSm(C(6)H(4)NO(2))(2)(C(2)O(4))]·2H(2)O}(n), the Sm(III) ion is eight-coordinated by four O atoms from four different nicotinate ligands and four O atoms from two different oxalate ligands. The three-coordinate Ag(I) ion is bonded to two N atoms from two different nicotinate anions and one O atom from an oxalate anion. These metal coordi...

13C chemical shielding in oxalic acid, oxalic acid dihydrate, and diammonium oxalate

13C chemical shielding tensors in three oxalates were investigated in order to determine the effe~ts of protonation and conformation changes on the tensor elements and their orientations. The expenmental results. together with those in the accompanying paper [R. G. Griffin and D. J. Ruben, J. Chern. ~hys. 63, 1272 (1975)], indicate that, while neither of these factors seems to seriously effect ...