menusearch results
results of search on CRYSTALLOGRAPHY JOURNALS ONLINE
16 citations found for Tremayne, M
Search for Tremayne, M in the World Directory of Crystallographers
Results 1 to 16, sorted by name:
abstracts
research papers
access
The crystal structures of triethyl-1,3,5-triazine-2,4,6-tricarboxylate, triethyl-1,3,5-benzenetricarboxylate and tris-2-hydroxyethyl isocyanurate have been determined from laboratory X-ray powder and single-crystal diffraction data, despite the presence of disorder and significant preferred orientation. The materials display contrasting packing behaviour, with only the triazine derivative retaining threefold molecular symmetry in its crystal structure.
abstracts
abstracts
organic compounds
In the asymmetric unit of the crystal structure of nicotinamide-succinic acid (2/1), 2C6H6N2O·C4H6O4, there are two independent nicotinamide molecules in general positions and two half succinic acid molecules which lie about inversion centres. The structure contains acid-pyridine and amide-amide synthons with nicotinamide molecules forming ladders of alternating R22(8) and R42(8) rings linked through succinic acid to generate a corrugated hydrogen-bonded sheet. This sheet is a common supramolecular unit found in other 2:1 nicotinamide-dicarboxylic acid cocrystals, but the presence of two crystallographically distinct nicotinamides with anti and syn conformations, forming two distinct sheets within the same structure, is a novel packing feature in this type of material.
abstracts
abstracts
abstracts
abstracts
abstracts
research papers
The crystal structures of three substituted arenesulfonamides have been solved from X-ray powder diffraction data using a new direct-space structure solution method based on a differential evolution algorithm: N—H
O hydrogen bonding leads to supramolecular aggregates in three, two or one dimensions, modified in some cases by C—HO hydrogen bonds and aromatic ππ stacking interactions.
O hydrogen bonding leads to supramolecular aggregates in three, two or one dimensions, modified in some cases by C—HO hydrogen bonds and aromatic ππ stacking interactions.research papers
The crystal structure of 2,4,6-triisopropylbenzenesulfonamide, C15H25NO2S, has been solved by the Monte Carlo method from X-ray powder diffraction data collected at 120 (1) K using synchrotron radiation. The stucture contains molecules linked by N—HO hydrogen bonds into two-dimensional sheets built from 
and 
rings.
O hydrogen bonds into two-dimensional sheets built from 
and 
rings.
fast communications
A Monte Carlo technique has been successfully applied to solve the crystal structure of p-methoxybenzoic acid from X-ray powder diffraction data
research papers
A new development of the Monte Carlo technique for structure solution from powder diffraction data, involving restrained relaxation of the geometry of the structural fragment during the Monte Carlo calculation, is reported.
abstracts
abstracts
