151
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Fun HK, Loh WS, Samshuddin S, Narayana B, Sarojini BK. (2E)-3-(4-Cyano-phen-yl)-1-(4,4''-difluoro-5'-meth-oxy-1,1':3',1''-terphenyl-4'-yl)prop-2-en-1-one. Acta Crystallogr Sect E Struct Rep Online 2012; 68:o1877-8. [PMID: 22719638 PMCID: PMC3379440 DOI: 10.1107/s1600536812023124] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2012] [Accepted: 05/21/2012] [Indexed: 11/30/2022]
Abstract
In the title compound, C29H19F2NO2, the central benzene ring forms a dihedral angle of 56.92 (12)° with the cyanobenzene ring and dihedral angles of 40.91 (12) and 44.76 (12)° with the two fluorobenzene rings. In the crystal, C—H⋯O and C—H⋯F hydrogen bonds link the molecules into sheets lying parallel to the ab plane. The crystal packing also features C—H⋯π interactions involving the central benzene ring.
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152
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Kant R, Gupta VK, Kapoor K, Narayana B. 2-(2-Chloro-phen-yl)acetic acid. Acta Crystallogr Sect E Struct Rep Online 2012; 68:o1940. [PMID: 22719691 PMCID: PMC3379493 DOI: 10.1107/s1600536812023938] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2012] [Accepted: 05/25/2012] [Indexed: 11/10/2022]
Abstract
In the title compound, C(8)H(7)ClO(2), the carboxyl group forms a dihedral angle of 74.83 (9)° with the benzene ring plane. In the crystal, mol-ecules are linked into inversion dimers by pairs of O-H⋯O hydrogen bonds. The dimers are linked into layers parallel to the bc plane by weak C-H⋯O inter-actions.
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153
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Kant R, Kapoor K, Narayana B. 2-(2-Bromo-phen-yl)acetic acid. Acta Crystallogr Sect E Struct Rep Online 2012; 68:o1704. [PMID: 22719495 PMCID: PMC3379297 DOI: 10.1107/s1600536812020545] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2012] [Accepted: 05/07/2012] [Indexed: 11/10/2022]
Abstract
In the title mol-ecule, C(8)H(7)BrO(2), the carboxyl group is twisted by 76.2 (3)° from the benzene ring plane. In the crystal, mol-ecules are linked into inversion dimers through pairs of O-H⋯O hydrogen bonds. The dimers are further linked into layers parallel to the bc plane by weak C-H⋯O hydrogen bonds.
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154
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Fun HK, Arshad S, Samshuddin S, Narayana B, Sarojini BK. 3,5-Bis(4-fluorophenyl)isoxazole. Acta Crystallogr Sect E Struct Rep Online 2012; 68:o1783. [PMID: 22719560 PMCID: PMC3379362 DOI: 10.1107/s160053681202171x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2012] [Accepted: 05/14/2012] [Indexed: 11/24/2022]
Abstract
In the crystal structure of the title compound, C15H9F2NO, the complete molecule is generated by a crystallographic twofold rotation axis and the O and N atoms of the central isoxazole ring are statistically disordered with equal site occupancies. The terminal benzene rings form a dihedral angle of 24.23 (3)° with the isoxazole ring. The dihedral angle between the benzene rings is 47.39 (2)°. No significant intermolecular interactions are observed.
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155
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Fun HK, Chia TS, Nayak PS, Narayana B, Sarojini BK. N-(2,6-Dimethylphenyl)-2,2-diphenylacetamide. Acta Crystallogr Sect E Struct Rep Online 2012; 68:o1287-8. [PMID: 22590199 PMCID: PMC3344437 DOI: 10.1107/s1600536812013451] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2012] [Accepted: 03/28/2012] [Indexed: 11/12/2022]
Abstract
In the title compound, C22H21NO, the dihedral angle between the phenyl rings is 82.59 (7)°. The dimethylbenzene ring forms dihedral angles of 52.86 (4) and 49.65 (5)° with the two phenyl rings. In the crystal, molecules are linked by N—H⋯O hydrogen bonds, forming a C(4) chain along the c axis. The crystal also features C—H⋯π interactions.
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156
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Fun HK, Loh WS, Shetty DN, Narayana B, Sarojini BK. N-(3-Chloro-4-fluorophenyl)acetamide. Acta Crystallogr Sect E Struct Rep Online 2012; 68:o1348. [PMID: 22590244 PMCID: PMC3344482 DOI: 10.1107/s160053681201416x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2012] [Accepted: 04/01/2012] [Indexed: 11/10/2022]
Abstract
In the title compound, C8H7ClFNO, the dihedral angle between the benzene ring and the acetamide side chain is 5.47 (6)°. An S(6) ring motif is formed via an intramolecular C—H⋯O hydrogen bond. In the crystal, N—H⋯O hydrogen bonds link the molecules into C(4) chains along [001].
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157
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Fun HK, Ooi CW, Shetty DN, Narayana B, Sarojini BK. 4-Methylbenzoic acid– N′-[( E)-4-methylbenzylidene]pyridine-4-carbohydrazide–water (1/1/1). Acta Crystallogr Sect E Struct Rep Online 2012; 68:o1492. [PMID: 22590364 PMCID: PMC3344602 DOI: 10.1107/s1600536812016868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2012] [Accepted: 04/17/2012] [Indexed: 11/12/2022]
Abstract
In the title hydrated 1:1 adduct, C8H8O2·C14H13N3O·H2O, the Schiff base molecule exists in an E conformation with respect to the N=C bond [1.2843 (13) Å] and the dihedral angle between the pyridine ring and the benzene ring is 1.04 (5)°. In the crystal, molecules are linked by N—H⋯O, C—H⋯O, O—H⋯O and O—H⋯N hydrogen bonds into sheets lying parallel to the ab plane. The crystal structure also features π–π interactions with centroid–centroid distances of 3.6224 (6) and 3.7121 (6) Å.
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158
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Fun HK, Ooi CW, Samshuddin S, Narayana B, Sarojini BK. [2,6-Bis(biphenyl-4-yl)-4-hy-droxy-4-(pyridin-2-yl)cyclo-hexane-1,3-di-yl]bis-[(pyridin-2-yl)methanone]-butan-2-one (1/1). Acta Crystallogr Sect E Struct Rep Online 2012; 68:o1633-4. [PMID: 22719435 PMCID: PMC3379237 DOI: 10.1107/s1600536812019241] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2012] [Accepted: 04/29/2012] [Indexed: 11/10/2022]
Abstract
In the title solvate, C(47)H(37)N(3)O(3)·C(4)H(8)O, the cyclo-hexane ring adopts a chair conformation and the plane through its near coplanar atoms forms dihedral angles of 82.58 (7), 89.27 (7), 60.30 (8), 54.54 (7) and 72.03 (7)°, respectively, with the three pyridine rings and the two attached benzene rings. The rings of the biphenyl units are twisted from each other, making dihedral angles of 35.27 (7) and 45.41 (7)°. All the rings are in equatorial orientations in the cyclo-hexane ring, except for the C=O-bonded pyridine ring in position 1, which is axial. Intra-molecular O-H⋯N and C-H⋯O hydrogen bonds form one S(5) and three S(6) ring motifs. In the crystal, mol-ecules are linked via C-H⋯O hydrogen bonds into a chain along the c axis. The crystal structure also features weak C-H⋯π inter-actions and aromatic π-π stacking [centroid-centroid distances = 3.5856 (10) and 3.7090 (9) Å].
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159
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Dutkiewicz G, Shetty DN, Narayana B, Yathirajan HS, Kubicki M. 4-[(4-Benzyl-oxybenzyl-idene)amino]-1,5-dimethyl-2-phenyl-1H-pyrazol-3(2H)-one. Acta Crystallogr Sect E Struct Rep Online 2012; 68:o1324. [PMID: 22590225 PMCID: PMC3344463 DOI: 10.1107/s1600536812014262] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2012] [Accepted: 04/02/2012] [Indexed: 05/31/2023]
Abstract
In the title mol-ecule, C(25)H(23)N(3)O(2), two terminal phenyl rings are twisted by 50.20 (6) and 71.26 (5)° from the mean plane (r.m.s. deviation = 0.032 Å) of the central benzyl-idene-amino-pyrazolone fragment. The N atoms of the pyrazole ring have a pyramidal environment, the sums of the valence angles around them being 353.5 (2) and 347.3 (2)°. The crystal structure is stabilized by C-H⋯O interactions.
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160
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Fun HK, Chia TS, Nayak PS, Narayana B, Sarojini BK. N-(2,4-Dimethyl-phen-yl)-2,2-diphenyl-acetamide. Acta Crystallogr Sect E Struct Rep Online 2012; 68:o1316-7. [PMID: 22590219 PMCID: PMC3344457 DOI: 10.1107/s1600536812014079] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2012] [Accepted: 03/31/2012] [Indexed: 11/17/2022]
Abstract
The asymmetric unit of the title compound, C22H21NO, consists of two crystallographically independent molecules (A and B). Each molecule contains two benzene rings and one dimethylbenzene ring. The dihedral angle between the two benzene rings is 87.75 (16)° in molecule A and 89.25 (16)° in molecule B. In molecule A, the dimethylbenzene ring forms dihedral angles of 89.65 (8) and 42.98 (11)° with the two benzene rings, whereas the corresponding angles are equal to 63.15 (7) and 58.67 (10)° in molecule B. An intramolecular C—H⋯O hydrogen bond generates an S(6) ring motif in each molecule. In the crystal, molecules are linked by bifurcated (N,C)—H⋯O hydrogen bonds, generating R21(6) ring motifs and forming infinite chains along the a axis. The crystal is further stabilized by C—H⋯π and π–π interactions with centroid–centroid distances of 3.8543 (18) and 3.930 (2) Å.
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161
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Fun HK, Ooi CW, Nayak PS, Narayana B, Sarojini BK. N-(3,4-Difluoro-phen-yl)-2,2-diphenyl-acetamide. Acta Crystallogr Sect E Struct Rep Online 2012; 68:o1349-50. [PMID: 22590245 PMCID: PMC3344483 DOI: 10.1107/s1600536812014675] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2012] [Accepted: 04/04/2012] [Indexed: 11/25/2022]
Abstract
In the title compound, C20H15F2NO, the mean plane of the acetamide group makes dihedral angles of 88.26 (6), 78.30 (7) and 9.83 (6)° with the two terminal benzene rings and difluoro-substituted benzene ring, respectively. One F atom is disordered over two orientations rotated by 180°, with a site-occupancy ratio of 0.557 (2):0.443 (2). An intramolecular C—H⋯O hydrogen bond generates an S(6) ring motif. In the crystal, molecules are linked via N—H⋯O hydrogen bonds into chains along the c axis. The crystal structure is further consolidated by C—H⋯π interactions.
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162
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Fun HK, Quah CK, Shetty DN, Narayana B, Sarojini BK. N'-(2,6-Difluoro-benzyl-idene)pyridine-4-carbohydrazide. Acta Crystallogr Sect E Struct Rep Online 2012; 68:o1484. [PMID: 22590356 PMCID: PMC3344594 DOI: 10.1107/s1600536812016716] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2012] [Accepted: 04/17/2012] [Indexed: 11/30/2022]
Abstract
In the title compound, C13H9F2N3O, the pyridine ring forms a dihedral angle of 16.92 (7)° with the benzene ring. In the crystal, molecules are linked via N—H⋯O, C—H⋯O and C—H⋯F, with the same O atom accepting two bonds.
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163
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Fun HK, Ooi CW, Nayak PS, Narayana B, Sarojini BK. 2,2-Diphenyl-N-(1,3-thia-zol-2-yl)acetamide. Acta Crystallogr Sect E Struct Rep Online 2012; 68:o1312-3. [PMID: 22590217 PMCID: PMC3344455 DOI: 10.1107/s1600536812013840] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2012] [Accepted: 03/30/2012] [Indexed: 11/10/2022]
Abstract
In the title molecule, C17H14N2OS, the mean plane of the acetamide group forms dihedral angles of 75.79 (5), 81.85 (6) and 12.32 (5)° with the two phenyl rings and the thiazole ring, respectively. In the crystal, N—H⋯N hydrogen bonds link pairs of molecules into inversion dimers with R22(8) ring motifs. The crystal packing is further stabilized by C—H⋯π interactions and by π–π interactions with a centroid–centroid distance of 3.6977 (5) Å.
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164
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Fun HK, Chia TS, Samshuddin S, Narayana B, Sarojini BK. (2E)-3-(2-Bromo-phen-yl)-1-(4,4''-difluoro-5'-meth-oxy-1,1':3',1''-terphenyl-4'-yl)prop-2-en-1-one. Acta Crystallogr Sect E Struct Rep Online 2012; 68:o1314-5. [PMID: 22590218 PMCID: PMC3344456 DOI: 10.1107/s1600536812013852] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2012] [Accepted: 03/30/2012] [Indexed: 11/24/2022]
Abstract
In the title compound, C28H19BrF2O2, the central benzene ring makes dihedral angles of 62.51 (18), 46.23 (18) and 48.19 (18)° with the bromo-substituted benzene ring and two terminal fluoro-substituted benzene rings, respectively. In the crystal, molecules are linked by C—H⋯F hydrogen bonds into infinite chains along [110]. Weak C—H⋯π and π–π interactions [centroid–centroid distance = 3.683 (2) Å] also occur and short intermolecular F⋯F contacts [2.833 (4) Å] are observed.
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165
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Fun HK, Quah CK, Nayak PS, Narayana B, Sarojini BK. N-(2,6-Dichloro-phen-yl)-2-(naphthalen-1-yl)acetamide. Acta Crystallogr Sect E Struct Rep Online 2012; 68:o1385. [PMID: 22590275 PMCID: PMC3344513 DOI: 10.1107/s1600536812014869] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2012] [Accepted: 04/04/2012] [Indexed: 11/16/2022]
Abstract
In the title compound, C18H13Cl2NO, the naphthalene ring system and the benzene ring form dihedral angles of 74.73 (13) and 62.53 (16)°, respectively, with the acetamide grouping [maximum deviation = 0.005 (3) Å]. The naphthalene ring system forms a dihedral angle of 75.14 (13)° with the benzene ring. In the crystal, molecules are linked by N—H⋯O hydrogen bonds, forming C(4) chains propagating in [010]. The O atom also accepts two C—H⋯O interactions.
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166
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Fun HK, Chia TS, Sapnakumari M, Narayana B, Sarojini BK. (2E)-1-(2,4-Dichloro-phen-yl)-3-(3,4,5-trimeth-oxy-phen-yl)prop-2-en-1-one. Acta Crystallogr Sect E Struct Rep Online 2012; 68:o1465. [PMID: 22590339 PMCID: PMC3344577 DOI: 10.1107/s1600536812016339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2012] [Accepted: 04/15/2012] [Indexed: 12/05/2022]
Abstract
In the title compound, C18H16Cl2O4, the dihedral angle between the benzene rings is 82.40 (4)°. The methoxy groups at both meta positions of the 3,4,5-trimethoxyphenyl ring are slightly twisted from the aromatic ring [C—O—C—C = −166.60 (8) and −6.18 (13)°], whereas the methoxy group at the para position is almost perpendicular [C—O—C—C = 112.08 (9)°]. The ketone O atom is connected to the 2,4-dichlorophenyl group through a Car—Car—C—O (ar = aromatic) torsion angle of −116.43 (9)°. In the crystal, molecules are linked by C—H⋯O hydrogen bonds into infinite chains along the b axis. The crystal structure also features C—H⋯π interactions.
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167
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Fun HK, Chia TS, Samshuddin S, Narayana B, Sarojini BK. (2E)-1-(4,4''-Difluoro-5'-meth-oxy-1,1':3',1''-terphenyl-4'-yl)-3-(2,6-difluoro-phen-yl)prop-2-en-1-one. Acta Crystallogr Sect E Struct Rep Online 2012; 68:o1560-1. [PMID: 22590420 PMCID: PMC3344658 DOI: 10.1107/s160053681201820x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2012] [Accepted: 04/23/2012] [Indexed: 11/13/2022]
Abstract
In the title compound, C28H18F4O2, the central benzene ring makes dihedral angles of 44.27 (6), 56.33 (5) and 77.27 (6)° with the two adjacent fluorobenzene rings and terminal difluoro-substituted benzene ring, respectively. The dihedral angle between the fluorobenzene rings is 87.81 (6)°. The methoxy and prop-2-en-1-one groups are essentially coplanar with their attached benzene rings, as indicated by their C—O—Car—Car [−0.06 (15)°] and C—C—Car—Car [4.5 (2)°] (ar = aromatic) torsion angles. In the crystal, molecules are linked by C—H⋯F and C—H⋯O hydrogen bonds into sheets lying parallel to the ac plane. The crystal structure also features C—H⋯π interactions.
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168
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Dayananda AS, Butcher RJ, Akkurt M, Yathirajan HS, Narayana B. Triprolidinium dichloranilate-chloranilic acid-methanol-water (2/1/2/2). Acta Crystallogr Sect E Struct Rep Online 2012; 68:o1037-8. [PMID: 22589908 PMCID: PMC3343999 DOI: 10.1107/s1600536812010136] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2012] [Accepted: 03/07/2012] [Indexed: 11/29/2022]
Abstract
In the triprolidinium cation of the title compound {systematic name: 2-[1-(4-methyl-phen-yl)-3-(pyrrolidin-1-ium-1-yl)prop-1-en-1-yl]pyridin-1-ium bis-(2,5-dichloro-4-hy-droxy-3,6-dioxo-cyclo-hexa-1,4-dien-1-olate)-2,5-dichloro-3,6-dihy-droxy-cyclo-hexa-2,5-diene-1,4-dione-methanol-water (2/1/2/2)}, C(19)H(24)N(2) (2+)·2C(6)HCl(2)O(4) (-)·0.5C(6)H(2)Cl(2)O(4)·CH(3)OH·H(2)O, the N atoms on both the pyrrolidine and pyridine groups are protonated. The neutral chloranilic acid mol-ecule is on an inversion symmetry element and its hy-droxy H atoms are disordered over two positions with site-occupancy factors of 0.53 (6) and 0.47 (6). The methanol solvent mol-ecule is disordered over two positions in a 0.836 (4):0.164 (4) ratio. In the crystal, N-H⋯O, O-H⋯O and C-H⋯O inter-actions link the components. The crystal structure also features π-π inter-actions between the benzene rings [centroid-centroid distances = 3.5674 (15), 3.5225 (15) and 3.6347 (15) Å].
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169
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Fun HK, Quah CK, Samshuddin S, Narayana B, Sarojini BK. 1-[3-(4-Chloro-phen-yl)-5-(4-meth-oxy-phen-yl)-4,5-dihydro-1H-pyrazol-1-yl]butan-1-one. Acta Crystallogr Sect E Struct Rep Online 2012; 68:o975. [PMID: 22590030 PMCID: PMC3343949 DOI: 10.1107/s1600536812009105] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2012] [Accepted: 02/29/2012] [Indexed: 11/17/2022]
Abstract
In the title compound, C20H21ClN2O2, the benzene rings form dihedral angles of 6.35 (5) and 81.82 (5)° with the mean plane of the 4,5-dihydro-1H-pyrazole ring (r.m.s. deviation = 0.145 Å). This latter ring adopts an envelope conformation with the CH grouping as the flap. The dihedral angle between the benzene rings is 75.63 (4)°. In the crystal, molecules are linked by C—H⋯Cl and C—H⋯O hydrogen bonds into chains along [-201]. The crystal structure also features C—H⋯π interactions.
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170
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Fun HK, Quah CK, Samshuddin S, Narayana B, Sarojini BK. 1-[3-(4-Chlorophenyl)-5-(4-methoxyphenyl)-4,5-dihydro-1 H-pyrazol-1-yl]ethanone. Acta Crystallogr Sect E Struct Rep Online 2012; 68:o1023. [PMID: 22589896 PMCID: PMC3343987 DOI: 10.1107/s1600536812009439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2012] [Accepted: 03/03/2012] [Indexed: 05/26/2023]
Abstract
In the title compound, C18H17ClN2O2, the benzene rings form dihedral angles of 6.69 (6) and 74.88 (5)° with the 4,5-dihydro-1H-pyrazole ring. The benzene rings form a dihedral angle of 76.67 (5)° with each other. In the crystal, molecules are linkedviabifurcated (C,C)–H...O hydrogen bonds into chains along [010]. The crystal structure is further consolidated by C—H...π interactions.
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171
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Praveen AS, Jasinski JP, Golen JA, Yathirajan HS, Narayana B. (2E)-1-(2,6-Dichloro-3-fluoro-phen-yl)-3-(4-meth-oxy-phen-yl)prop-2-en-1-one. Acta Crystallogr Sect E Struct Rep Online 2012; 68:o1163. [PMID: 22606108 PMCID: PMC3344105 DOI: 10.1107/s1600536812011841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2012] [Accepted: 03/19/2012] [Indexed: 11/10/2022]
Abstract
There are two independent mol-ecules in the asymmetric unit of the title compound, C(16)H(11)Cl(2)FO(2). The F atom equally populates both meta positions of the 6-dichloro-3-fluoro-phenyl ring in each mol-ecule, resulting in 0.5 occupancy for both the F and H atoms in these positions. The dihedral angle between the mean planes of the benzene rings are 77.5 (2) and 89.8 (8)°in the two mol-ecules. In the crystal, weak C-H⋯F and C-H⋯O inter-actions involving the half-occupied H and F atoms are observed. Weak π-π stacking inter-actions [centroid-centroid distance = 3.150 (2) Å] also contribute to the crystal stability.
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172
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Fun HK, Chia TS, Nayak PS, Narayana B, Sarojini BK. (2E)-3-(3-Nitro-phen-yl)-1-[4-(piperidin-1-yl)phen-yl]prop-2-en-1-one. Acta Crystallogr Sect E Struct Rep Online 2012; 68:o974. [PMID: 22590029 PMCID: PMC3343948 DOI: 10.1107/s1600536812008847] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2012] [Accepted: 02/28/2012] [Indexed: 11/29/2022]
Abstract
In the title compound, C20H20N2O3, the piperidine ring adopts a chair conformation and its mean plane forms dihedral angles of 19.63 (9) and 19.44 (9)°, respectively, with the benzene and the nitro-substituted benzene ring. The benzene and nitro-substituted benzene rings are almost coplanar and make a dihedral angle of 4.78 (8)°. In the crystal, molecules are linked by C—H⋯O hydrogen bonds into two-dimensional networks parallel to the ab plane. The crystal packing is further stabilized by π–π interactions [maximum centroid–centroid distance = 3.7807 (12) Å].
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Fun HK, Chia TS, Samshuddin S, Narayana B, Sarojini BK. 2-[3,5-Bis(4-fluorophenyl)-4,5-dihydro-1 H-pyrazol-1-yl]-4,6-bis(4-fluorophenyl)pyrimidine. Acta Crystallogr Sect E Struct Rep Online 2012; 68:o807-8. [PMID: 22412674 PMCID: PMC3297871 DOI: 10.1107/s1600536812006976] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2012] [Accepted: 02/16/2012] [Indexed: 11/29/2022]
Abstract
In the title compound, C31H20F4N4, the pyrazole ring adopts an envelope conformation and forms a dihedral angle of 9.91 (6)° with the adjacent pyrimidine ring. The pyrimidine ring forms dihedral angles of 9.23 (6) and 2.16 (5)° with its adjacent fluoro-substituted benzene rings, whereas these angles are 88.22 (6) and 9.66 (6)° for the pyrazole ring and its adjacent benzene rings. In the crystal, molecules are linked by C—H⋯F hydrogen bonds into ribbons along [01-1]. The crystal packing is further stabilized by C—H⋯π and by π–π interactions, with centroid–centroid distances of 3.7428 (7) and 3.7630 (6) Å.
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174
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Fun HK, Ooi CW, Sarojini BK, Mohan BJ, Narayana B. 1-(6-Chloro-1,3-benzothiazol-2-yl)hydrazine. Acta Crystallogr Sect E Struct Rep Online 2012; 68:o691-2. [PMID: 22412583 PMCID: PMC3295472 DOI: 10.1107/s1600536812005442] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2012] [Accepted: 02/07/2012] [Indexed: 11/29/2022]
Abstract
The asymmetric unit of the title compound, C7H6ClN3S, consists of two crystallographically independent molecules (A and B). The dihedral angle between the benzothiazole ring system and the hydrazine group is 8.71 (6)° in molecule A and 7.16 (6)° in molecule B. The N—N—C—N and N—N—C—S torsion angles involving the hydrazine group are 170.89 (9) and −9.96 (13)°, respectively, in molecule A and 172.50 (9) and −7.43 (13)°, respectively, in molecule B. In the crystal, neighbouring molecules are connected via pairs of N—H⋯N hydrogen bonds, generating R22(8) ring motifs, and are connected further by N—H⋯N hydrogen bonds into sheets lying parallel to the ab plane. The crystal studied was an inversion twin, the refined ratio of the twin components being 0.50 (3):0.50 (3).
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175
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Fun HK, Arshad S, Samshuddin S, Narayana B, Sarojini BK. Ethyl ({5-[5'-(2-eth-oxy-2-oxoeth-oxy)-4,4''-difluoro-1,1':3',1''-terphenyl-4'-yl]-1,3,4-oxadiazol-2-yl}sulfan-yl)acetate. Acta Crystallogr Sect E Struct Rep Online 2012; 68:o674-5. [PMID: 22412572 PMCID: PMC3295461 DOI: 10.1107/s1600536812005028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2012] [Accepted: 02/05/2012] [Indexed: 11/24/2022]
Abstract
In the title compound, C28H24F2N2O6S, the whole molecule is disordered over two sites with refined occupancies of 0.778 (3) and 0.222 (3). The central benzene ring makes dihedral angles of 56.0 (4), 34.5 (4) and 70.9 (4)°, respectively, with the two terminal benzene rings and the 1,3,4-oxadiazole ring in the major component of the disordered molecule. The corresponding angles in the minor component are 59.7 (16), 25.6 (13) and 75.5 (14)°. In the crystal, molecules are linked via C—H⋯F, C—H⋯N, C—H⋯O and C—H⋯S hydrogen bonds into a three-dimensional network. In addition, C—H⋯π interactions are observed.
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