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1.  2-[3-(4-Bromo­phenyl)-5-(4-fluoro­phenyl)-4,5-di­hydro-1H-pyrazol-1-yl]-4-phenyl-1,3-thia­zole 
In the title compound, C24H17BrFN3S, the pyrazole ring is almost planar (r.m.s. deviation = 0.043 Å), with all but the perpendicular fluoro­benzene ring substituents [dihedral angle = 77.9 (3)°] being very approximately coplanar [dihedral angle with the 2-thienyl ring = 19.4 (3)° and with the bromo­benzene ring = 20.3 (3)°; dihedral angle between the 2-thienyl and attached phenyl ring = 11.0 (4)°], so that the mol­ecule has a T-shape. In the crystal, supra­molecular chains along the b-axis direction are sustained by C—H⋯S and C—Br⋯π inter­actions.
doi:10.1107/S1600536813010039
PMCID: PMC3648267  PMID: 23723887
2.  (2E)-3-(4-Fluoro­phen­yl)-1-[5-methyl-1-(4-methyl­phen­yl)-1H-1,2,3-triazol-4-yl]prop-2-en-1-one1  
With respect to the triazole ring in the title compound, C19H16FN3O, the p-tolyl ring is inclined [dihedral angle = 51.79 (11)°], whereas the chalcone residue is almost coplanar [O—C—C—N and C—C—C—C torsion angles = −178.71 (19) and 178.42 (18)°, respectively]. The conformation about the C=C bond [1.328 (3) Å] is E, and the triazole methyl group and the carbonyl O atom are syn. In the crystal, centrosymmetrically related mol­ecules are connected by π–π inter­actions between the triazole and p-tolyl rings [centroid–centroid distance = 3.6599 (12) Å] and these are linked into a three-dimensional architecture by C—H⋯N and C—H⋯π inter­actions.
doi:10.1107/S1600536813008246
PMCID: PMC3647839  PMID: 23723805
3.  (2E)-1-[5-Methyl-1-(4-methyl­phen­yl)-1H-1,2,3-triazol-4-yl]-3-[4-(piperidin-1-yl)phen­yl]prop-2-en-1-one1  
Two independent mol­ecules comprise the asymmetric unit of the title compound, C24H26N4O. The major difference between them is found in the relative orientation of the triazole-bound p-tolyl group which have the opposite sense of twist [N—N—C—C torsion angles = 55.8 (3) and −49.8 (3)°]. The chalcone residue is almost coplanar with the triazole ring [N—C—C—O and C—C—C—C torsion angles = −178.9 (2) and −178.5 (2)°, respectively; cf. 177.9 (3) and 168.5 (3)°, respectively, in the second mol­ecule]. The conformation about each C=C double bond is E and in each case the triazole methyl group is syn to the carbonyl O atom. In the crystal, mol­ecules aggregate into layers parallel to (-113). The first independent mol­ecule self-associates into a layer via C—H⋯O and C—H⋯π inter­actions. By contrast, layers comprising the second independent mol­ecule do not feature specific inter­actions between mol­ecules. The global crystal packing comprises alternating layers.
doi:10.1107/S1600536813008258
PMCID: PMC3647840  PMID: 23723806
4.  4-[5-(4-Fluoro­phen­yl)-1-(4-phenyl-1,3-thia­zol-2-yl)-4,5-dihydro-1H-pyrazol-3-yl]-5-methyl-1-(4-methyl­phenyl)-1H-1,2,3-triazole 
In the title compound, C28H23FN6S, the pyrazole ring adopts an envelope conformation, with the methine C atom being the flap atom. With respect to this ring, the 2-thienyl, triazole and fluoro­benzene rings are approximately coplanar, coplanar and perpendicular, respectively [dihedral angles = 8.56 (17), 6.03 (19) and 73.1 (2)°, respectively] so that to a first approximation the mol­ecule has a T-shape. In the crystal, mol­ecules are consolidated into a three-dimensional architecture by C—H⋯F (involving a bifurcated F atom), C—H⋯S and C—H⋯π inter­actions.
doi:10.1107/S1600536813008179
PMCID: PMC3629653  PMID: 23634140
5.  5-(4-Fluoro­phen­yl)-3-[5-methyl-1-(4-methyl­phen­yl)-1H-1,2,3-triazol-4-yl]-N-phenyl-4,5-dihydro-1H-pyrazole-1-carbothio­amide 
In the title compound, C26H23FN6S, the pyrazole ring has an envelope conformation, with the methine C atom being the flap atom. The thio­urea group is close to being coplanar with the pyrazole N atoms [N—N—C—S torsion angle = 176.78 (15)°], which allows for an intra­molecular N—H⋯N hydrogen bond; the connected triazole ring is nearly coplanar with this ring [N—C—C—N = −172.65 (19)°]. There is a significant twist between the pyrazole ring and attached fluoro­benzene ring [N—C—C—C = −18.8 (3)°] and a greater twist between triazole and attached tolyl ring [dihedral angle = 58.25 (14)°]. In the crystal, supra­molecular chains aligned along [40,10] are consolidated by π–π inter­actions between the triazole and phenyl rings [centroid–centroid distance = 3.7053 (13) Å].
doi:10.1107/S1600536813008155
PMCID: PMC3629654  PMID: 23634141
6.  2-[3-(4-Chloro­phen­yl)-5-(4-fluoro­phenyl)-4,5-dihydro-1H-pyrazol-1-yl]-4-phenyl-1,3-thia­zole 
In the title compound, C24H17ClFN3S, the pyrazole ring is almost planar (r.m.s. deviation = 0.030 Å). With the exception of the methine-bound benzene ring, which forms a dihedral angle of 85.77 (13)° with the pyrazole ring, the remaining non-C atoms lie in an approximate plane (r.m.s. deviation = 0.084 Å) so that overall the mol­ecule has a T-shape. In the crystal, centrosymmetrically related mol­ecules are connected via π–π inter­actions between pyrazole rings [centroid–centroid distance = 3.5370 (15) Å] and these stack along the a axis with no specific inter­actions between them.
doi:10.1107/S1600536813007496
PMCID: PMC3629623  PMID: 23634110
7.  5-Methyl-N′-[(3Z)-2-oxo-2,3-dihydro-1H-indol-3-yl­idene]-1-phenyl-1H-1,2,3-triazole-4-carbohydrazide 
In the title compound, C18H14N6O2, the benzene ring is slightly twisted out of the plane of the 1,2,3-triazole ring (r.m.s. deviation = 0.010 Å), forming a dihedral angle of 6.20 (13)°. The nine non-H ring atoms of the fused five- and six-membered ring system are almost coplanar (r.m.s. deviation = 0.032 Å). The near coplanarity in the central residue is consolidated by an intra­molecular bifurcated N—H⋯(O,N) hydrogen bond. The conformation about the N=C bond is Z. In the crystal, supra­molecular chains along [101] are sustained by N—H⋯O hydrogen bonds and C—H⋯O inter­actions. These are consolidated into a three-dimensional architecture by C—H⋯π and π–π inter­actions; the latter occur between centrosymmetrically related 1,2,3-triazole rings [centroid–centroid distance = 3.6056 (14) Å].
doi:10.1107/S1600536813007502
PMCID: PMC3629624  PMID: 23634111
8.  4-Dimethyl­amino-1-(4-meth­oxy­phen­yl)-2,5-dioxo-2,5-dihydro-1H-pyrrole-3-carbonitrile 
In the title compound, C14H13N3O3, a twist occurs, as seen in the dihedral angle of 53.60 (12)° between the pyrrole and benzene rings. A three-dimensional architecture is formed in the crystal whereby layers of mol­ecules in the ac plane are connected by C—H⋯O and C—H⋯π inter­actions.
doi:10.1107/S1600536813004893
PMCID: PMC3588536  PMID: 23476607
9.  3-(4-Chloro­phen­yl)-5-(4-fluoro­phen­yl)-4,5-dihydro-1H-pyrazole-1-carbothio­amide 
In the title compound, C16H13ClFN3S, the pyrazole ring adopts an envelope conformation with the methine C atom being the flap atom. The chloro- and fluoro­benzene rings are twisted out of the plane of the pyrazole ring [dihedral angles = 15.12 (11) and 80.55 (10)°, respectively]. The amine group is orientated towards a ring N atom, forming an intra­molecular N—H⋯N hydrogen bond. This H atom also forms a hydrogen bond to the F atom, which along with N—H⋯S hydrogen bonding leads to a supra­molecular chain along the c axis. Connections between chains of the type Cl⋯π lead to a layer in the bc plane.
doi:10.1107/S1600536813004492
PMCID: PMC3588515  PMID: 23476591
10.  2-[5-(4-Fluoro­phen­yl)-3-(4-methyl­phen­yl)-4,5-dihydro-1H-pyrazol-1-yl]-4-phenyl-1,3-thia­zole 
In the title compound, C25H20FN3S, two independent mol­ecules comprise the asymmetric unit, which differ in the relative orientation of the fluoro­benzene ring with respect to the pyrazole ring to which it is attached [dihedral angles = 89.39 (17) and 75.23 (16)° in the two mol­ecules]. Each pyrazole ring adopts an envelope conformation with the methine C atom being the flap atom. There are additional twists in the mol­ecules, e.g. between the five-membered rings [dihedral angles = 18.23 (16) and 17.84 (16)°] and between the thia­zole and attached phenyl ring [10.26 (16) and 20.87 (15)°]. Overall, each mol­ecule has a T-shape. In the crystal, mol­ecules are connected into a three-dimensional architecture by weak C—H⋯π inter­actions.
doi:10.1107/S1600536813004339
PMCID: PMC3588500  PMID: 23476577
11.  5-(4-Fluoro­phen­yl)-3-(4-methyl­phen­yl)-4,5-dihydro-1H-pyrazole-1-carbothio­amide 
The central pyrazole ring in the title compound, C17H16FN3S, adopts an envelope conformation with the methine C atom bearing the 4-fluoro­phenyl substituent as the flap atom. Whereas the tolyl ring is slightly twisted out of the least-squares plane through the pyrazole ring [dihedral angle = 13.51 (11)°], the fluoro­benzene ring is almost perpendicular [dihedral angle = 80.21 (11)°]. The thio­amide group is almost coplanar with the N—N bond of the ring [N—N—C—N torsion angle = 1.2 (3)°] and the amine group forms an intra­molecular hydrogen bond with a ring N atom. In the crystal, supra­molecular double layers in the bc plane are formed via N—H⋯S, N—H⋯F and C—H⋯F inter­actions.
doi:10.1107/S1600536813004194
PMCID: PMC3588501  PMID: 23476571
12.  2-(2,4-Dichloro­phen­oxy­meth­yl)-5-(4-methyl­phen­yl)imidazo[2,1-b][1,3,4]thia­diazole1  
In the title compound, C18H13Cl2N3OS, the eight atoms comprising the central imidazo/thia­diazo­lethia­diazole residue are coplanar (r.m.s. deviation = 0.009 Å). The dihedral angle of 8.72 (13)° between the dichloro­benzene and tolyl rings reflects a twist about the O—C(benzene) bond; the Cm—O—Cb—Cb torsion angle = −168.5 (2)° (m = methyl­ene C and b is benzene C). Supra­molecular tapes along the b axis are found in the crystal structure which are mediated by π–π inter­actions occurring between centrosymmetrically related thia­diazole rings [inter-ring centroid distance = 3.6907 (16) Å] and between the benzene and tolyl rings [inter-ring centroid distance = 3.7597 (16) Å].
doi:10.1107/S160053681300384X
PMCID: PMC3588533  PMID: 23476564
13.  5-(4-Fluoro­phen­yl)-3-[5-methyl-1-(4-methyl­phen­yl)-1H-1,2,3-triazol-4-yl]-4,5-dihydro-1H-pyrazole-1-carbothio­amide 
In the title compound, C20H19FN6S, the pyrazole ring has an envelope conformation, with the methine C atom being the flap atom. The dihedral angle between the least-squares plane through the pyrazole and triazole rings is 7.59 (9)°, and the triazole and attached benzene ring form a dihedral angle of 74.79 (9)°. The thio­urea group is coplanar with the pyrazole ring [N—N—C—S torsion angle = −179.93 (11)°], which enables the formation of an intra­molecular N—H⋯N hydrogen bond. In the crystal, inversion-related mol­ecules associate via N—H⋯S hydrogen bonds and eight-membered {⋯HNCS}2 synthons feature in the crystal packing. These synthons are connected into supra­molecular chains along the a axis via N—H⋯F hydrogen bonds, and the chains are consolidated into layers in the ab plane via C—H⋯S and C—H⋯F contacts.
doi:10.1107/S1600536812024245
PMCID: PMC3379505  PMID: 22719703
14.  4-{1-[4-(4-Bromo­phen­yl)-1,3-thia­zol-2-yl]-5-(4-fluoro­phen­yl)-4,5-dihydro-1H-pyrazol-3-yl}-5-methyl-1-(4-methyl­phen­yl)-1H-1,2,3-triazole 
In the title compound, C28H22BrFN6S, the central pyrazole ring has an envelope conformation, with the methine C atom being the flap atom. The dihedral angles between the least-squares plane through this ring and the adjacent thia­zole [18.81 (15)°] and triazole [1.83 (16)°] rings indicate a twist in the mol­ecule. A further twist is evident by the dihedral angle of 64.48 (16)° between the triazole ring and the attached benzene ring. In the crystal, C—H⋯N, C—H⋯F, C—H⋯π and π–π inter­actions [occurring between the thia­zole and triazole rings, centroid–centroid distance = 3.571 (2) Å] link mol­ecules into a three-dimensional architecture. The sample studied was a non-merohedral twin; the minor twin component refined to 47.16 (7)%.
doi:10.1107/S1600536812024257
PMCID: PMC3379506  PMID: 22719704
15.  3-[5-Methyl-1-(4-methyl­phen­yl)-1H-1,2,3-triazol-4-yl]-N-phenyl-5-[4-(piperidin-1-yl)phen­yl]-4,5-dihydro-1H-pyrazole-1-carbothio­amide dimethyl­formamide hemisolvate 
The essentially planar pyrazole ring (r.m.s. deviation = 0.013 Å) in the title hemisolvate, C31H33N7S·0.5C3H7NO, is almost coplanar with the pendant thio­urea residue [N—N—C—S torsion angle = −173.2 (4)°] and slightly twisted with respect to the triazole ring [dihedral angle = 7.7 (3)°]. An intra­molecular thio­urea–pyrazole N—H⋯N hydrogen bond, via an S(5) loop, is formed. Supra­molecular chains along the c axis are formed in the crystal via piperidine–triazole C—H⋯N inter­actions. These are bridged into loosely associated double chains via C—H⋯O inter­actions involving the disordered (over two positions) dimethyl­formamide solvent mol­ecules. The thio­urea-bound phenyl ring is also disordered over two positions of equal occupancy.
doi:10.1107/S1600536812024488
PMCID: PMC3393261  PMID: 22807818

Results 1-15 (15)