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Search Results: 1 - 10 of 299889 matches for " Ray J. Butcher "
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R. Prasath,P. Bhavana,Anand M. Butcher,Ray J. Butcher
Acta Crystallographica Section E , 2010, DOI: 10.1107/s1600536810041309
Abstract: The title molecule, C24H20Cl2N4, lies on an inversion center in an extended trans conformation. In the crystal, weak C—H...Cl interactions connect the molecules into chains along [010].
Aqua{6,6′-dimethoxy-2,2′-[ethane-1,2-diylbis(nitrilomethylidyne)]diphenolato}methanolmanganese(III)) perchlorate hemihydrate
Gervas Assey,Ray J. Butcher,Yilma Gultneh
Acta Crystallographica Section E , 2010, DOI: 10.1107/s1600536810023366
Abstract: The asymmetric unit of the title compound, [Mn(C18H18N2O4)(CH3OH)(H2O)]ClO4·0.5H2O, contains two complex cations and two perchlorate anions, one of which is disordered over two positions in a 0.767 (8):0.233 (8) ratio. The MnIII atoms are in distorted octahedral environments. In addition to the equatorial tetradentate salicylaldimine ligand, each Mn is axially coordinated by both a methanol and a water molecule. The complex is a dimer held together by multiple strong and weak hydrogen-bonding interactions between the coordinated water molecule on one monomer with all the phenolic and methoxy O atoms on the other monomer. In addition, the two perchlorate anions are linked by hydrogen bonds to the two methanol molecules coordinated to each Mn center. The Mn—O phenolic bond distances range from 1.868 (2) to 1.882 (2) while the Mn—N distances range from 1.978 (2) to 1.981 (2) . Mn—O distances for the axial water and methanol ligands are longer at 2.226 (2)/2.257 (2) and 2.313 (2)/2.324 (2) , reflecting the usual Jahn–Teller distortion as found in MnIII complexes.
Kouassi Ayikoe,Ray J. Butcher,Yilma Gultneh
Acta Crystallographica Section E , 2010, DOI: 10.1107/s1600536810043497
Abstract: The molecule of the title compound, [Ni4(CH3O)4(C8H7O3)4(CH3OH)4], has S4 symmetry. Each of the four NiII atoms occupies every other corner of a cube, with the alternate corners occupied by μ3-methanolate bridging groups linking to three NiII atoms. Each NiII atom is in an O6 octahedral coordination environment formed by three O atoms from three μ3-methanolate groups, one from methanol, and two others from a bidentate 2-formyl-6-methoxyphenolate ligand. The Ni—O bond distances range from 2.0020 (14) to 2.0938 (14) , the cis bond angles range from 81.74 (6) to 97.63°, and the trans bond angles range from 168.76 (5) to 175.22 (6)°. There are bifurcated hydrogen-bonding interactions between the coordinated methanol OH groups and both the phenolic and methoxy O atoms of an adjoining 2-formyl-6-methoxyphenolate moiety. In addition, there are weak intermolecular C—H...O interactions involving the methoxy O atoms.
Acetato(aqua){6,6′-dimethoxy-2,2′-[ethane-1,2-diylbis(nitrilomethanylylidene)]diphenolato}cobalt(III) methanol disolvate
Gervas Assey,Ray J. Butcher,Yilma Gultneh
Acta Crystallographica Section E , 2012, DOI: 10.1107/s1600536812027687
Abstract: In the title complex, [Co(C18H18N2O4)(C2H3O2)(H2O)]·2CH3OH, the CoIII atom is hexacoordinated by water and acetate groups in the axial positions and by the tetradentate Schiff base occupying equatorial positions. These axial bonds are longer than the equatorial bonds to the tetradentate Schiff base. Two molecules form a dimer through strong hydrogen bonds from the coordinated water of one molecule to the methoxy O atoms of an adjoining molecule. There is extensive intra- and intermolecular O—H...O hydrogen bonding between the coordinated water and acetate ligands and the methanol solvent molecules. In addition, there are weak intermolecular C—H...O interactions, which link the molecules into a three-dimensional array.
Yakini Brandy,Ray J. Butcher,Oladapo Bakare
Acta Crystallographica Section E , 2012, DOI: 10.1107/s1600536812034150
Abstract: The title compound, C17H11NO3, was an intermediate synthesized during bisacylation of 2-amino-1,4-naphthoquinone with benzoyl chloride. A mixture of block- and needle-shaped crystals were obtained after column chromatography. The block-shaped crystals were identified as the imide and the needles were the title amide. The naphthoquinone scaffold is roughly planar (r.m.s. deviation = 0.047 for the C atoms). The N—H and C=O bonds of the amide group are anti to each other. A dihedral angle between the naphthoquinone ring system and the amide group of 3.56 (3)°, accompanied by a dihedral angle between the amide group and the phenyl group of 9.51 (3)°, makes the naphthoquinone ring essentially coplanar with the phenyl ring [dihedral angle = 7.12 (1)°]. In the crystal, molecules are linked by a weak N—H...O hydrogen bond and by two weak C—H...O interactions leading to the formation of zigzag chains along [010].
Yakini Brandy,Ray J. Butcher,Oladapo Bakare
Acta Crystallographica Section E , 2012, DOI: 10.1107/s1600536812030231
Abstract: The title molecule, C24H15NO4, crystallizes with two molecules in the asymmetric unit (Z′ = 2). For both molecules, the two amide groups are not coplanar, as the dihedral angles of the respective NCO groups are similar at 50.37 (14) and 51.22 (13)°. However, the orientations of the substituent phenyl rings with the central naphthalene system are significantly different for the two molecules; for one molecule, these dihedral angles are 80.29 (3) and 80.95 (4)°, while for the second molecule they are 86.63 (3) and 72.82 (4)°. The crystal packing shows the molecules to be linked by weak C—H...O interactions.
R. Prasath,P. Bhavana,Ray J. Butcher
Acta Crystallographica Section E , 2012, DOI: 10.1107/s1600536812015498
Abstract: In the title compound, C21H19NO, there are two molecules in the asymmetric unit (Z′ = 2). There are π–π interactions between these two molecules [centroid–centroid distance = 3.678 (2) ], as well as a weak C—H...O interaction. The conformation adopted by the two molecules is such that the quinoline mean plane and the benzene ring are almost perpendicular [89.04 (5) and 76.89 (4)°]. In each molecule, the methyl group of the tolyl ring is disordered over two conformations, with occupancy ratios of 0.56 (3):0.44 (3) and 0.65 (3):0.35 (3).
3,3′-(1-Oxopropane-1,3-diyl)bis(1,3-thiazolidine-2-thione) chlorobenzene hemisolvate
Christine Franzel,Andrew Purdy,Ray J. Butcher
Acta Crystallographica Section E , 2013, DOI: 10.1107/s1600536813003292
Abstract: The title compound, C9H12N2OS4·0.5C6H5Cl, which contains two 1,3-thiazolidine-2-thione rings, is a by-product of the synthesis of 3-acryloyl-1,3-thiazolidine-2-thione. The dihedral angle between these rings is 79.95 (9)°, with both rings displaying a twisted conformation. The twist angle of the amide group is 5.6 (1)°. In the crystal, the molecules are linked into [001] chains by C—H...O interactions. The chlorobenzene solvent molecule was found to show unresolvable disorder about a centre of inversion and its contribution to the scattering was removed with the SQUEEZE option in PLATON [Spek (2009). Acta Cryst. D65, 148–155].
Ethylenediammonium tetrakis({2,2′-[ethane-1,2-diylbis(nitrilomethylidyne)]diphenolato}nickel(II)) bis(perchlorate) dimethylformamide monosolvate
Gervas Assey,Yilma Gultneh,Ray J. Butcher
Acta Crystallographica Section E , 2010, DOI: 10.1107/s1600536810017162
Abstract: The title compound, (C2H10N2)[Ni(C16H14N2O2)]4(ClO4)2·C3H7NO, crystallizes with four Ni(salen) molecules {salen is 2,2′-[ethane-1,2-diylbis(nitrilomethylidyne)]diphenolate}, one ethylenediammonium cation (actually two half-cations, each located on a center of inversion), two perchlorate anions and one dimethylformamide solvent molecule in the asymmetric unit. Each NiII cation in the Ni(salen) complex is four-coordinated by two imine N atoms and two phenolate O atoms from the tetradentate ligand. The Ni(salen) units form parallel slipped stacks with Ni...Ni separations of 3.4541 (4) and 3.6442 (6) . The crystal packing is stabilized by intermolecular hydrogen bonds between the ammonium H atoms and the perchlorate and salen O atoms, which generate a three-dimensional structure.
μ-Bromido-bis{μ-2,2′-[4,7-diazadecane-1,10-diylbis(nitrilomethanylylidene)]diphenolato}tricopper(II) bromide dimethylformamide disolvate
Gervas Assey,Ray J. Butcher,Yilma Gultneh
Acta Crystallographica Section E , 2011, DOI: 10.1107/s160053681103090x
Abstract: The complex molecule of the title compound, [Cu3Br(C22H28N4O2)2]Br·2C3H7NO, contains three copper atoms, two of which are five-coordinate within a square-pyramidal environment and linked by a bridging Br atom occupying the apical position in each square pyramid. The remaining Cu atom is four-coordinate but with considerable tetrahedral disortion [the dihedral angle between the two chelate planes is 69.21 (7)°]. There are two molecules of dimethylformamide (DMF) present as solvent molecules, one of which is disordered over two equivalent conformations with occupancies of 0.603 (5) and 0.397 (5). The amine H atoms are involved in both inter- and intramolecular hydrogen-bonding interactions with the Br and O atoms of the cation, as well as with the O atom of the ordered DMF molecule.
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