similar articles
pharmaceuticals and natural products
The preparation, single-crystal X-ray structure and solution-state NMR analysis of (±)-threo-ritalinic acid, obtained from the hydrolysis of the methyl ester (±)-threo-methyl phenidate, are reported.
short structural papers
addenda and errata
research communications
Open access
The title compounds consist of a 1,7,7-trimethylbicyclo[2.2.1]heptane (bornane or camphane) skeleton which is decorated with acetamide for (±)-(1) and chloroacetamide for (±)-(2), functionalities. In the crystals of both compounds, molecules are linked via N—HO hydrogen bonds, reinforced by C—HO contacts, forming chains propagating along the a axis.
short communications
An error in the structure-factor expression for space group P6222 (No. 180) has been found in International Tables for X-ray Crystallography, Volume I, 1st through 3rd editions. The minus sign of the second sine function in the B part of the equation for l = 3n ± 1 should be a plus sign.
research papers
The crystal structure of hydrated (±)-mefloquine hydrochloride is determined by an ab initio algorithm (simulated annealing) using X-ray powder diffraction data and confirmed by a combination of theoretical calculations and Fourier transform–infrared spectroscopy.
research papers
The structures of the isostructural sodium, potassium, and ammonium double salts of [Co(en)3]Cl3 (en is ethane-1,2-diamine) have been determined and, compared with the parent compound, show a modest increase in the unit-cell volume.
research communications
Open access
The structure, coordination geometry and extended hydrogen-bonded network of tris(ethane-1,2-diamine-κ2N,N′)cobalt(III) bis(iodide) triiodide is discussed.
research communications
The crystal structure of the C-terminal domain of the plant-specific microtubule minus-end-targeting protein Spiral2 was determined to 2.2 Å resolution. The structure is shown to be similar to the C-terminal domain of the katanin regulatory subunit p80.
research communications
The first structure with coordinates of tris(trans-1,2-diaminocyclohexane)cobalt(III) chloride monohydrate in the space group I2d is reported.