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Search Results: 1 - 10 of 44950 matches for " Michael Bolte "
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(Z)-N-(3-(2-Chloro-4-nitrophenyl)-4-methylthiazol-2(3H)-ylidene) Pivalamide: Synthesis and Crystal Structure  [PDF]
Aamer Saeed, Michael Bolte
Journal of Crystallization Process and Technology (JCPT) , 2011, DOI: 10.4236/jcpt.2011.13007
Abstract: Synthesis of the title compound was carried out by base-catalyzed cyclization of 1-pivaloyl-3-(2-chloro-4-nitrophenyl) thiourea with α-bromoacetone produced in situ. The structure was confirmed by the spectroscopic and elemental analysis and single crystal X-ray diffraction data. It crystallizes in the triclinic space group P-1 with unit cell dime sions a = 8.7137(10), b = 10.2010(14), c = 10.6593(13), α = 62.671(9), β = 82.701(10), γ = 79.762(10), V = 827.21(8) ų, Z = 2.
1-(4-Chlorophenyl)-4,4,6-trimethyl-3,4-dihydropyrimidine-2(1H)-thione
Aamer Saeed,Michael Bolte
Acta Crystallographica Section E , 2010, DOI: 10.1107/s1600536810001777
Abstract: The dihydropyrimidine ring of the title compound, C13H15ClN2S, adopts an envelope conformation with five almost coplanar atoms (r.m.s. deviation = 0.054 ) and the C atom bearing the two methyl substituents deviating from this plane by 0.441 (2) . The best plane through the five almost coplanar atoms forms a dihedral angle of 89.56 (5)° with the benzene ring. The crystal packing is characterized by centrosymmetric dimers connected by pairs of N—H...S hydrogen bonds.
1-(4-Fluorophenyl)biguanid-1-ium chloride
Maya Tutughamiarso,Michael Bolte
Acta Crystallographica Section E , 2010, DOI: 10.1107/s1600536810037785
Abstract: The title compound, C8H11FN5+·Cl , crystallized with a monoprotonated 1-(4-fluorophenyl)biguanidinium cation and a chloride anion in the asymmetric unit. The biguanidium group is not planar [dihedral angle between the two CN3 groups = 52.0 (1)°] and is rotated with respect to the phenyl group [τ = 54.3 (3)°]. In the crystal, N—H...N hydrogen-bonded centrosymmetric dimers are connected into ribbons, which are further stabilized by N—H...Cl interactions, forming a three-dimensional hydrogen-bonded network.
2-Amino-1-methyl-1H-imidazol-4(5H)-one dimethyl sulfoxide monosolvate
Maya Tutughamiarso,Michael Bolte
Acta Crystallographica Section E , 2010, DOI: 10.1107/s1600536810038997
Abstract: In the title compound, C4H7N3O·C2H6OS, creatinine [2-amino-1-methyl-1H-imidazol-4(5H)one] exists in the amine form. The ring is planar (r.m.s. deviation for all non-H atoms = 0.017 ). In the crystal, two creatinine molecules form centrosymmetric hydrogen-bonded dimers linked by pairs of N—H...N hydrogen bonds. In addition, creatinine is linked to a dimethyl sulfoxide molecule by an N—H...O interaction. The packing shows layers parallel to (120).
(5S,6R)-6-Bromo-6-methyl-5-phenyl-3,4,5,6-tetrahydro-2H-cyclopenta[b]pyran-7-one
Winai Ieawsuwan,Michael Bolte
Acta Crystallographica Section E , 2011, DOI: 10.1107/s1600536811038232
Abstract: The title compound, C15H15BrO2, was synthesized by a Br nsted acid-catalysed domino electrocyclization-halogenation reaction. The five-membered ring is essentially planar (r.m.s. deviation 0.006 ) and forms a dihedral angle of 72.7 (3)° with the attached phenyl ring. The six-membered heterocycle adopts a half-chair conformation. The crystal packing is stabilized by a C—H...O contact.
(4R)-4-(Biphenyl-4-yl)-7-chloro-1,2,3,4-tetrahydroquinoline
Thomas Theissmann,Michael Bolte
Acta Crystallographica Section E , 2011, DOI: 10.1107/s160053681103830x
Abstract: The title compound, C21H18ClN, was synthesized by an enantioselective Br nsted acid-catalysed transfer hydrogenation reaction. The six-membered heterocycle adopts a half-chair conformation. It has the biphenyl residue in an axial position. The two rings of the biphenyl residue are almost coplanar [dihedral angle = 2.65 (9)°]. The crystal packing is stabilized by N—H...Cl hydrogen bonds, which connect the molecules into chains running along the a axis.
(1R,2S)-Methyl 1-(4-chlorophenyl)-3-oxo-1,2,3,4-tetrahydrocyclopenta[b]indole-2-carboxylate 0.2-hydrate
Sadiya Raja,Michael Bolte
Acta Crystallographica Section E , 2011, DOI: 10.1107/s1600536811042358
Abstract: The title compound, C19H14ClNO3·0.2H2O, crystallizes with five molecules and a disordered water molecule in the asymmetric unit. Four of the five molecules form hydrogen-bonded dimers via N—H...O hydrogen bonds towards another symmetry-independent molecule, whereas the fifth molecule forms a hydrogen-bonded dimer with its symmetry equivalent, also via N—H...O hydrogen bonds. The dihedral angle between the planes of the fused benzene ring and the five-membered ring to which it is attached is 79.45 (13), 49.00 (15), 72.49 (16), 81.91 (18) and 76.38 (16)° for the five molecules in the asymmetric unit.
Pyridinium-2-carboxylate–benzene-1,2-diol (1/1)
Cuong Quoc Ton,Michael Bolte
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809043207
Abstract: The title compound, C6H5NO2·C6H6O2, crystallizes with one pyridinium-2-carboxylate zwitterion and one molecule of benzene-1,2-diol in the asymmetric unit. The crystal structure is characterized by alternating molecules forming zigzag chains running along the a axis: the molecules are connected by O—H...O and N—H...(O,O) hydrogen bonds.
2-Hydroxybenzyl alcohol–phenanthroline (1/1)
Cuong Quoc Ton,Michael Bolte
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809044699
Abstract: Crystals of the title compound, C12H8N2·C7H8O2, were obtained during cocrystallization experiments of a compound with two hydrogen-bond donors (2-hydroxybenzyl alcohol) with another compound containing two hydrogen-bond acceptors (phenanthroline). Unexpectedly, the two molecules do not form dimers with two O—H...N hydrogen bonds connecting the two molecules. However, one of the hydroxy groups forms a bifurcated hydrogen bond to both phenanthroline N atoms, whereas the other hydroxy group forms an O—H...O hydrogen bond to a symmetry-equivalent 2-hydroxybenzyl alcohol molecule. In addition, the crystal packing is stabilized by π–π interactions between the two phenanthroline ring systems, with a centroid–centroid distance of 3.570 .
Bis(2,6-dicarboxypyridinium) dichloride acetone monosolvate
Cuong Quoc Ton,Michael Bolte
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809043220
Abstract: The title compound, 2C7H6NO4+·2Cl ·C3H6O, crystallizes with two 2,6-dicarboxypyridinium cations, two chloride anions and one acetone molecule in the asymmetric unit. The crystal structure is characterized by alternating cations and by Cl anions, forming zigzag chains running along the a axis.
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