Browsing by Author "Loh, W.-S."

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2-(4-Bromo-phen-yl)-2-oxoethyl 4-meth-oxy-benzoate
(2011) Fun, H.-K.; Loh, W.-S.; Garudachari, B.; Isloor, A.M.; Satyanarayan, M.N.
In the title compound, C16H13BrO4, the benzene rings are almost perpendicular to each other, making a dihedral angle of 84.07 (8) . In the crystal, the mol-ecules are linked into chains along the a axis via inter-molecular C - H?O hydrogen bonds. A C - H?? inter-action is also observed.
2-(4-Bromo-phen-yl)-2-oxoethyl 4-meth-oxy-benzoate
(2011) Fun, H.-K.; Loh, W.-S.; Garudachari, B.; Isloor, A.M.; Satyanarayan, M.N.
In the title compound, C16H13BrO4, the benzene rings are almost perpendicular to each other, making a dihedral angle of 84.07 (8)°. In the crystal, the mol-ecules are linked into chains along the a axis via inter-molecular C - H?O hydrogen bonds. A C - H?? inter-action is also observed.
2-(4-Bromophenyl)-2-oxoethyl 4-hydroxybenzoate
(2011) Fun, H.-K.; Loh, W.-S.; Garudachari, B.; Isloor, A.M.; Satyanarayan, M.N.
In the title compound, C15H11BrO4, the dihedral angle between the aromatic rings is 66.77 (8) . In the crystal, O - H?O, C - H?Br and C - H?O hydrogen bonds link the molecules, forming layers lying parallel to (101). The crystal packing is further consolidated by C - H?? inter-actions and ?-? stacking interactions [centroid-centroid distance = 3.5476 (7) ]. Fun et al. 2011.
2-(4-Bromophenyl)-2-oxoethyl 4-hydroxybenzoate
(2011) Fun, H.-K.; Loh, W.-S.; Garudachari, B.; Isloor, A.M.; Satyanarayana, M.N.
In the title compound, C15H11BrO4, the dihedral angle between the aromatic rings is 66.77 (8)°. In the crystal, O - H?O, C - H?Br and C - H?O hydrogen bonds link the molecules, forming layers lying parallel to (101). The crystal packing is further consolidated by C - H?? inter-actions and ?-? stacking interactions [centroid-centroid distance = 3.5476 (7) Å]. © Fun et al. 2011.
2-(4-Chloro-phen-yl)-2-oxoethyl 3-(trifluoro-meth-yl)benzoate
(2011) Fun, H.-K.; Loh, W.-S.; Garudachari, B.; Isloor, A.M.; Satyanarayan, M.N.
In the title compound, C 16H 10C lF 3O 3, the two benzene rings are slightly twisted from each other, with a dihedral angle of 15.50 (8) between the planes. In the crystal, inter-molecular C - H?O hydrogen bonds link the mol-ecules into a layer parallel to the bc plane. Fun et al. 2011.
2-(4-Chloro-phen-yl)-2-oxoethyl 3-(trifluoro-meth-yl)benzoate
(2011) Fun, H.-K.; Loh, W.-S.; Garudachari, B.; Isloor, A.M.; Satyanarayan, M.N.
In the title compound, C 16H 10C lF 3O 3, the two benzene rings are slightly twisted from each other, with a dihedral angle of 15.50 (8)° between the planes. In the crystal, inter-molecular C - H?O hydrogen bonds link the mol-ecules into a layer parallel to the bc plane. © Fun et al. 2011.
2-(4-Chlorophenyl)-2-oxoethyl 4-methylbenzoate
(2011) Fun, H.-K.; Loh, W.-S.; Garudachari, B.; Isloor, A.M.; Satyanarayan, M.N.
In the title compound, C16H13ClO3, the dihedral angle between the benzene rings is 80.74 (8) . In the crystal, C - H?O hydrogen bonds link the mol-ecules to form C(11) chains propagating in [010]. Fun et al. 2011.
2-(4-Chlorophenyl)-2-oxoethyl 4-methylbenzoate
(2011) Fun, H.-K.; Loh, W.-S.; Garudachari, B.; Isloor, A.M.; Satyanarayana, M.N.
In the title compound, C16H13ClO3, the dihedral angle between the benzene rings is 80.74 (8)°. In the crystal, C - H?O hydrogen bonds link the mol-ecules to form C(11) chains propagating in [010]. © Fun et al. 2011.
2-(4-Fluorophenyl)-2-oxoethyl 4-methoxybenzoate
(2011) Fun, H.-K.; Loh, W.-S.; Garudachari, B.; Isloor, A.M.; Satyanarayan, M.N.
In the title compound, C16H13FO4, the dihedral angle between the benzene rings is 84.28 (8) . In the crystal, C-H?F and C-H?O hydrogen bonds link the molecules to form a three-dimensional network. The crystal structure is consolidated by C-H?? interactions and short F?F contacts [2.7748 (14) ] also occur..
2-(4-Fluorophenyl)-2-oxoethyl 4-methoxybenzoate
(2011) Fun, H.-K.; Loh, W.-S.; Garudachari, B.; Isloor, A.M.; Satyanarayan, M.N.
In the title compound, C16H13FO4, the dihedral angle between the benzene rings is 84.28 (8)°. In the crystal, C-H?F and C-H?O hydrogen bonds link the molecules to form a three-dimensional network. The crystal structure is consolidated by C-H?? interactions and short F?F contacts [2.7748 (14) Å] also occur..
2-(8-Bromoimidazo[1,2-a]pyridin-2-yl)-N?-[(E)-4-diethylamino-2- hydroxybenzyl-idene]acetohydrazide dihydrate
(2012) Fun, H.-K.; Loh, W.-S.; Shenvi, S.; Isloor, A.M.; Hegde, G.
In the title compound, C 20H 22BrN 5O 2 2H 2O, the Schiff base mol-ecule exists in an E conformation with respect to the acyclic C=N bond. An S(6) ring motif is formed via an intra-molecular O - H?N hydrogen bond. The dihedral angle between the imidazo[1,2-a]pyridine system and the benzene ring is 84.62 (5) . In the crystal, N - H?O, O - H?O, O - H?N, C - H?O and C - H?Br hydrogen bonds link the mol-ecules into a three-dimensional network. The crystal packing is further stabilized by C - H?? and ?-? inter-actions [centroid-centroid distance = 3.5365 (7) ].
2-(8-Bromoimidazo[1,2-a]pyridin-2-yl)-N?-[(E)-4-diethylamino-2- hydroxybenzyl-idene]acetohydrazide dihydrate
(2012) Fun, H.-K.; Loh, W.-S.; Shenvi, S.S.; Isloor, A.M.; Hegde, G.
In the title compound, C 20H 22BrN 5O 2·2H 2O, the Schiff base mol-ecule exists in an E conformation with respect to the acyclic C=N bond. An S(6) ring motif is formed via an intra-molecular O - H?N hydrogen bond. The dihedral angle between the imidazo[1,2-a]pyridine system and the benzene ring is 84.62 (5)°. In the crystal, N - H?O, O - H?O, O - H?N, C - H?O and C - H?Br hydrogen bonds link the mol-ecules into a three-dimensional network. The crystal packing is further stabilized by C - H?? and ?-? inter-actions [centroid-centroid distance = 3.5365 (7) Å].
2-Cyclopentylidenehydrazinecarboxamide
(2012) Fun, H.-K.; Loh, W.-S.; Padaki, M.; Isloor, A.M.; Isloor, N.A.
The asymmetric unit of the title compound, C6H 11N3O, consists of two independent molecules in which the cyclo-pentane rings adopt envelope conformations with CH2 grouping as the flap and the semicarbazone groups are essentially planar, with maximums deviation of 0.0311 (12) and 0.0285 (12) . In the crystal, N - H?O, N - H?N and C - H?O hydrogen bonds link the molecules to form sheets lying parallel to the ab plane.
2-Cyclopentylidenehydrazinecarboxamide
(2012) Fun, H.-K.; Loh, W.-S.; Padaki, M.; Isloor, A.M.; Isloor, N.
The asymmetric unit of the title compound, C6H 11N3O, consists of two independent molecules in which the cyclo-pentane rings adopt envelope conformations with CH2 grouping as the flap and the semicarbazone groups are essentially planar, with maximums deviation of 0.0311 (12) and 0.0285 (12) Å. In the crystal, N - H?O, N - H?N and C - H?O hydrogen bonds link the molecules to form sheets lying parallel to the ab plane.
5-Azido-4-benz-yloxy-2-meth-oxy-6-methyl-perhydro-pyran-3-ol
(2009) Fun, H.-K.; Loh, W.-S.; Rai, S.; Shetty, P.; Isloor, A.M.
In the title compound, C14H19N3O 4, the perhydro-pyran ring adopts a chair conformation. An intra-molecular C - H?O hydrogen bond generates an S(6) ring motif. In the crystal packing, molecules are linked by O - H?O hydrogen bonds, forming infinite chains along [100]. 2009 Fun et al.
5-Azido-4-benz-yloxy-2-meth-oxy-6-methyl-perhydro-pyran-3-ol
(2009) Fun, H.-K.; Loh, W.-S.; Rai, S.; Shetty, P.; Isloor, A.M.
In the title compound, C14H19N3O 4, the perhydro-pyran ring adopts a chair conformation. An intra-molecular C - H?O hydrogen bond generates an S(6) ring motif. In the crystal packing, molecules are linked by O - H?O hydrogen bonds, forming infinite chains along [100]. © 2009 Fun et al.
Diethyl 4-[5-(4-chlorophenyl)-1H-pyrazol-4-yl]-2,6-dimethyl-1,4-dihydro- pyridine-3,5-dicarboxylate
(2012) Fun, H.-K.; Loh, W.-S.; Vijesh, A.M.; Isloor, A.M.; Malladi, S.
In the title compound, C22H24ClN3O 4, intra-molecular C - H?O and C - H?N hydrogen bonds form S(9) and S(7) ring motifs, respectively. The 1,4-dihydro-pyridine ring adopts a flattened boat conformation. The benzene ring makes a dihedral angle of 33.36 (6) with the pyrazole ring. In the crystal, pairs of N - H?N hydrogen bonds link the molecules into inversion dimers. The dimers are stacked in column along the a axis through N - H?O and C - H?N hydrogen bonds. The crystal packing also features C - H?? inter-actions involving the pyrazole ring. Fun et al. 2012.
Diethyl 4-[5-(4-chlorophenyl)-1H-pyrazol-4-yl]-2,6-dimethyl-1,4-dihydro- pyridine-3,5-dicarboxylate
(2012) Fun, H.-K.; Loh, W.-S.; Vijesh, A.M.; Isloor, A.M.; Malladi, S.
In the title compound, C22H24ClN3O 4, intra-molecular C - H?O and C - H?N hydrogen bonds form S(9) and S(7) ring motifs, respectively. The 1,4-dihydro-pyridine ring adopts a flattened boat conformation. The benzene ring makes a dihedral angle of 33.36 (6)°with the pyrazole ring. In the crystal, pairs of N - H?N hydrogen bonds link the molecules into inversion dimers. The dimers are stacked in column along the a axis through N - H?O and C - H?N hydrogen bonds. The crystal packing also features C - H?? inter-actions involving the pyrazole ring. © Fun et al. 2012.
N?-[(E)-(3-Phenyl-1H-pyrazol-4-yl)methylidene]naphtho-[2,1-b] furan-2-carbohydrazide monohydrate
(2011) Fun, H.-K.; Loh, W.-S.; Malladi, S.; Ganesh, B.M.; Isloor, A.M.
In the title hydrate, C23H16N4O 2 H2O, the pyrazole ring is approximately planar, with a maximum deviation of 0.023 (1) , and makes dihedral angles of 28.63 (6) and 46.44 (7) with the naphtho-[2,1-b]furan ring system and the benzene ring, respectively, In the crystal, O-H?N, O-H?O, N-H?O, N-H?N, C-H?O and C-H?N hydrogen bonds link the molecules, forming sheets lying parallel to the ab plane. The crystal structure also features C-H?? interactions involving the centroids of the pyrazole and benzene rings.
N?-[(E)-(3-Phenyl-1H-pyrazol-4-yl)methylidene]naphtho-[2,1-b] furan-2-carbohydrazide monohydrate
(2011) Fun, H.-K.; Loh, W.-S.; Malladi, S.; Ganesh, B.M.; Isloor, A.M.
In the title hydrate, C23H16N4O 2·H2O, the pyrazole ring is approximately planar, with a maximum deviation of 0.023 (1) Å, and makes dihedral angles of 28.63 (6) and 46.44 (7)°with the naphtho-[2,1-b]furan ring system and the benzene ring, respectively, In the crystal, O-H?N, O-H?O, N-H?O, N-H?N, C-H?O and C-H?N hydrogen bonds link the molecules, forming sheets lying parallel to the ab plane. The crystal structure also features C-H?? interactions involving the centroids of the pyrazole and benzene rings.