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1.  (5E)-5-(2,4-Dichloro­benzyl­idene)-2-(piperidin-1-yl)-1,3-thia­zol-4(5H)-one 
In the title compound, C15H14Cl2N2OS, the piperidine ring adopts a chair conformation. The dihedral angle between the thia­zolidine ring and the dichloro­benzene ring is 9.30 (4)°; this near coplanar conformation is stabilized by the formation of an intra­molecular C—H⋯S hydrogen bond, which generates an S(6) ring. In the crystal, mol­ecules are linked by C—H⋯O hydrogen bonds, forming [001] chains. Weak π–π inter­actions [centroid–centroid separation = 3.5460 (5) Å] consolidate the structure.
doi:10.1107/S1600536811040785
PMCID: PMC3247615  PMID: 22219920
2.  N′-(4-Chloro­benzyl­idene)-2-[4-(methyl­sulfan­yl)phen­yl]acetohydrazide 
In the title compound, C16H15ClN2OS, the hydrazine group is twisted slightly: the C—N—N—C torsion angle is 175.46 (13)°. The dihedral angle between the two terminal aromatic rings is 87.01 (8)°. In the crystal, inversion dimers linked by pairs of N—H⋯O hydrogen bonds generate R 2 2(8) loops. The dimers are further linked by weak C—H⋯π inter­actions.
doi:10.1107/S1600536811039857
PMCID: PMC3247585  PMID: 22219890
3.  (E)-1-(3,4-Dimeth­oxy­phen­yl)-3-[4-(methyl­sulfan­yl)phen­yl]prop-2-en-1-one 
In the title compound, C18H18O3S, the C=C double bond exists in an E configuration and the dihedral angle between the two benzene rings is 11.74 (8)°. In the crystal, mol­ecules are linked into a three-dimensional network by C—H⋯O hydrogen bonds. The crystal structure is also stabilized by weak C—H⋯π inter­actions.
doi:10.1107/S160053681103323X
PMCID: PMC3200737  PMID: 22058995
4.  N-(2-Chloro­phen­yl)-2-({5-[4-(methyl­sulfan­yl)benz­yl]-4-phenyl-4H-1,2,4-triazol-3-yl}sulfan­yl)acetamide 
In the title mol­ecule, C24H21ClN4OS2, the central 1,2,4-triazole ring forms dihedral angles of 89.05 (9), 86.66 (9) and 82.70 (10)° with the chloro-substituted benzene ring, the methyl­sulfanyl-substituted benzene ring and the phenyl ring, respectively. In the crystal, mol­ecules are linked into sheets parallel to (100) by inter­molecular N—H⋯N and weak C—H⋯O hydrogen bonds.
doi:10.1107/S1600536811027565
PMCID: PMC3213509  PMID: 22091088
5.  3-{1-[4-(2-Methyl­prop­yl)phen­yl]eth­yl}-4-phenyl-1H-1,2,4-triazole-5(4H)-thione 
In the title compound, C20H23N3S, the central 1,2,4-triazole ring makes dihedral angles of 69.76 (9) and 81.69 (8)°, respectively, with the phenyl and benzene rings. In the crystal, mol­ecules are linked into a centrosymmetric dimer by a pair of inter­molecular N—H⋯S hydrogen bonds, generating an R 2 2(8) ring motif.
doi:10.1107/S1600536811025773
PMCID: PMC3212329  PMID: 22090986
6.  (5E)-5-(4-Meth­oxy­benzyl­idene)-2-(piperidin-1-yl)-1,3-thia­zol-4(5H)-one 
In the title compound, C16H18N2O2S, the piperidine ring adopts a chair conformation. The central 4-thia­zolidinone ring makes dihedral angles of 12.01 (7) and 51.42 (9)°, respectively, with the benzene ring and the least-squares plane of the piperidine ring. An intra­molecular C—H⋯S hydrogen bond stabilizes the mol­ecular structure and generates an S(6) ring motif. In the crystal, mol­ecules are linked into a tape along the c axis by inter­molecular C—H⋯O hydrogen bonds.
doi:10.1107/S1600536811025761
PMCID: PMC3212306  PMID: 22090963
7.  N-[(E)-4-Chloro­benzyl­idene]-2,4-dimethyl­aniline 
The title mol­ecule, C15H14ClN, exists in a trans configuration with respect to the C=N bond [1.2813 (16) Å]. The dihedral angle between the benzene rings is 52.91 (6)°. The crystal structure is stabilized by weak inter­molecular C—H⋯π inter­actions.
doi:10.1107/S1600536811026109
PMCID: PMC3212319  PMID: 22090976
8.  2-[4-(Methyl­sulfon­yl)phen­yl]acetonitrile 
In the title compound, C9H9NO2S, the benzene ring and the acetonitrile group are approximately coplanar, with a C—C—C—C torsion angle of 1.1 (3)° between them. In the crystal, mol­ecules are linked via inter­molecular C—H⋯O hydrogen bonds into layers parallel to (001).
doi:10.1107/S1600536811003837
PMCID: PMC3052001  PMID: 21522336
9.  2-Methyl-6-(trifluoro­meth­yl)imidazo[1,2-a]pyridine-3-carbonitrile 
In the title compound, C10H6F3N3, the imidazo[1,2-a]pyridine group is essentially planar with a maximum deviation of 0.021 (1) Å. The F atoms in the trifluoro­methyl group and the methyl H atoms are each disordered over two sets of sites with refined site occupancies of 0.68 (1):0.32 (1). In the crystal, mol­ecules are linked into infinite chains through two C—H⋯N inter­actions forming R 2 2(12) and R 2 2(8) hydrogen-bond ring motifs. These chains are stacked along the a axis.
doi:10.1107/S1600536811003928
PMCID: PMC3052008  PMID: 21522335
10.  (E)-3-(4-Chloro­phen­yl)-1-(2,3,4-trichloro­phen­yl)prop-2-en-1-one 
In the title chalcone derivative, C15H8Cl4O, the C=C double bond exists in an E configuration and the dihedral angle between the two benzene rings is 48.13 (11)°. In the crystal, mol­ecules are arranged into columns and stacked down the a axis featuring possible weak aromatic π–π stacking inter­actions [centroid–centroid separation = 3.888 (2) Å].
doi:10.1107/S1600536810053213
PMCID: PMC3051492  PMID: 21522935
11.  2-Isobutyl-6-phenyl­imidazo[2,1-b][1,3,4]thia­diazole 
In the title compound, C14H15N3S, the imidazo[2,1-b][1,3,4]thia­diazole fused-ring system is close to planar, with a maximum deviation of 0.042 (1) Å, and the dihedral angle between it and the phenyl ring is 24.21 (6)°. The isobutyl group is disordered over two sets of sites in a 0.899 (9):0.101 (9) ratio. In the crystal, weak aromatic π–π stacking inter­actions involving the imidazole and thia­diazole rings with a centroid–centroid distance of 3.8067 (7) Å occur.
doi:10.1107/S1600536810053201
PMCID: PMC3051612  PMID: 21522948
12.  Methyl 2-[2-(benzyl­oxycarbonyl­amino)­propan-2-yl]-5-hy­droxy-6-meth­oxy­pyrimidine-4-carboxyl­ate 
In the title compound, C18H21N3O6, a pyrimidine derivative, the dihedral angle between the benzene and pyrimidine rings is 52.26 (12)°. The carboxyl­ate unit is twisted with respect to the pyrimidine ring, making a dihedral angle of 12.33 (7)°. In the crystal, mol­ecules are linked by a pair of O—H⋯O hydrogen bonds, forming an inversion dimer. The dimers are stacked into columns along the b axis through weak C—H⋯O inter­actions.
doi:10.1107/S160053681005467X
PMCID: PMC3051748  PMID: 21522966
13.  2-Isobutyl-6-(4-meth­oxy­phen­yl)imidazo[2,1-b][1,3,4]thia­diazole 
In the title compound, C15H17N3OS, the dihedral angle between the statistically planar imidazo[2,1-b][1,3,4]thia­dia­zole fused-ring system (r.m.s. deviation = 0.002 Å) and the methyoxbenzene ring is 4.52 (6)°. In the crystal, mol­ecules are arranged into columns and stacked down the a axis. The crystal structure is stabilized by weak C—H⋯π and π–π inter­actions [centroid–centroid separations = 3.6053 (8) and 3.7088 (7) Å].
doi:10.1107/S1600536810053225
PMCID: PMC3051798  PMID: 21522949
14.  6-(4-Chloro­phen­yl)-2-isobutyl­imidazo[2,1-b][1,3,4]thia­diazole 
In the title compound, C14H14ClN3S, the imidazo[2,1-b][1,3,4]thia­diazole system is essentially planar, with a maximum deviation of 0.006 (2) Å. The dihedral angle between the imidazo[2,1-b][1,3,4]thia­diazole and chloro­phenyl rings is 5.07 (8)°. In the crystal, there are no classical hydrogen bonds but stabilization is provided by weak π–π [centroid–centroid distance = 3.5697 (11) Å] and C—H⋯π inter­actions.
doi:10.1107/S1600536810052621
PMCID: PMC3050343  PMID: 21522707

Results 1-14 (14)