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Ariffin A, Nordin N, Yehye WA, Ng SW. Methyl 2-[(3,5-di-tert-butyl-4-hy-droxy-benz-yl)sulfan-yl]pyridine-3-carboxyl-ate n-hexane hemisolvate. Acta Crystallogr Sect E Struct Rep Online 2012; 68:o1605. [PMID: 22719411 PMCID: PMC3379213 DOI: 10.1107/s1600536812018739] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2012] [Accepted: 04/26/2012] [Indexed: 11/15/2022]
Abstract
The title solvated ester, C22H29NO3S·0.5C6H14, crystallizes with two independent molecules along with a hexane molecule in the asymmetric unit. The two aromatic rings are separated by an –CH2–S– linkage; the rings are aligned at 83.27 (4)° in one molecule and 47.66 (7)° in the other. The hydroxy group of one molecule forms an O—H⋯O hydrogen bond to the other molecule.
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2
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A. Alhadi A, A. Shaker S, A. Yehye W, Mohd Ali H, A. Abdullah M. Synthesis, magnetic and spectroscopic studies of Ni(II), Cu(II), Zn(II) and Cd(II) complexes of a newly Schiff base derived from 5-bromo-2-hydroxybezylidene)-3,4,5-trihydroxybenzohydrazide). B CHEM SOC ETHIOPIA 2012. [DOI: 10.4314/bcse.v26i1.10] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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3
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Khaledi H, Alhadi AA, Yehye WA, Ali HM, Abdulla MA, Hassandarvish P. Antioxidant, Cytotoxic Activities, and Structure-Activity Relationship of Gallic Acid-based Indole Derivatives. Arch Pharm (Weinheim) 2011; 344:703-9. [DOI: 10.1002/ardp.201000223] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2010] [Revised: 09/18/2010] [Accepted: 09/24/2010] [Indexed: 11/09/2022]
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4
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Mansor S, Yehye WA, Ariffin A, Ng SW. 2-Sulfanylidene-1,2-dihydropyridine-3-carbohydrazide. Acta Crystallogr Sect E Struct Rep Online 2010; 66:o2516. [PMID: 21587510 PMCID: PMC2983366 DOI: 10.1107/s160053681003521x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2010] [Accepted: 09/01/2010] [Indexed: 11/10/2022]
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Yehye WA, Ariffin A, Rahman NA, Ng SW. 2-[4-Acetyl-5-(biphenyl-4-yl)-4,5-dihydro-1,3,4-oxadiazol-2-yl]phenyl acetate. Acta Crystallogr Sect E Struct Rep Online 2010; 66:o878. [PMID: 21580697 PMCID: PMC2984012 DOI: 10.1107/s1600536810009621] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2010] [Accepted: 03/14/2010] [Indexed: 11/22/2022]
Abstract
In the title molecule, C24H20N2O4, the five-membered oxadiazole ring is nearly planar (r.m.s. deviation = 0.053 Å) and the phenyl ring of the biphenyl unit attached to it forms a dihedral angle of 73.2 (1)°; the other phenyl ring is close to coplanar with the oxadiazole ring [dihedral angle = 6.2 (2)°].
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Affiliation(s)
- Wagee A Yehye
- Department of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia
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Yehye WA, Ariffin A, Rahman NA, Ng SW. N'-[(Biphenyl-4-yl)methyl-ene]-2-[(3,5-di-tert-butyl-4-hydroxy-benz-yl)sulfan-yl]acetohydrazide. Acta Crystallogr Sect E Struct Rep Online 2010; 66:o734. [PMID: 21580580 PMCID: PMC2983883 DOI: 10.1107/s1600536810006884] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2010] [Accepted: 02/23/2010] [Indexed: 05/30/2023]
Abstract
In the title compound, C(30)H(36)N(2)O(2)S, the dihedral angle between the two aromatic rings of the biphenyl residue is 31.2 (1)°. The two methyl-ene C atoms subtend an angle of 99.9 (1)° at the S atom. In the crystal, mol-ecules form inversion dimers linked by pairs of N-H⋯O hydrogen bonds. The hydroxyl group is shielded by the tert-butyl residues and is therefore not involved in any hydrogen bonding.
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Affiliation(s)
- Wagee A. Yehye
- Department of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Azhar Ariffin
- Department of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | | | - Seik Weng Ng
- Department of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia
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Yehye WA, Ariffin A, Rahman NA, Ng SW. 2-(3,5-Di- tert-butyl-4-hydroxybenzylsulfanyl)- N′-(3-methoxybenzylidene)acetohydrazide. Acta Crystallogr Sect E Struct Rep Online 2009; 65:o2112. [PMID: 21577527 PMCID: PMC2970103 DOI: 10.1107/s1600536809030645] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2009] [Accepted: 08/01/2009] [Indexed: 11/10/2022]
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Abstract
The dianion of the title salt, 2C5H6N+·C12H6N2O4S22−, lies on a special position of 2 site symmetry that relates one thionicotinate part to the other, and the dihedral angle between the niotinate planes is 89.2 (2)°. The pyridinium cations are hydrogen bonded to the carboxylate group by way of N—H⋯O links.
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Affiliation(s)
- Wagee A Yehye
- Department of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia
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Yehye WA, Ariffin A, Ng SW. 2-[(3,5-Di- tert-butyl-4-hydroxybenzyl)sulfanyl]- N′-isopropylideneacetohydrazide. Acta Crystallogr Sect E Struct Rep Online 2009; 65:o730. [PMID: 21582464 PMCID: PMC2968854 DOI: 10.1107/s1600536809007843] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2009] [Accepted: 03/04/2009] [Indexed: 11/17/2022]
Abstract
The title compound, C20H32N2O2S, the condensation product of a thioacetohydrazine and acetone, has a two-coordinate S atom and the angle at this atom is 100.7 (1)°. The (CH3)C=N—NH—C(O)– substituent engages in N—H⋯O hydrogen-bonding interactions with the substituent of an adjacent molecule across a center of inversion, generating a dimeric structure.
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Yehye WA, Ariffin A, Rahman NA, Ng SW. N′-(3-Bromo-5-chloro-2-hydroxybenzylidine)-2-hydroxybenzohydrazide. Acta Crystallogr Sect E Struct Rep Online 2008; 64:o2438. [PMID: 21581406 PMCID: PMC2959983 DOI: 10.1107/s1600536808038634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2008] [Accepted: 11/19/2008] [Indexed: 11/24/2022]
Abstract
In the approximately planar title molecule, C14H10BrClN3O2, the dihedral angle between the aromatic ring planes is 5.79 (12)°. The conformation is stabilized by intramolecular O—H⋯N and N—H⋯O hydrogen bonds and an intermolecular O—H⋯O link leads to chains in the crystal propagating in [001].
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Yehye WA, Ariffin A, Rahman NA, Ng SW. Biphenyl-4-carbaldehyde azine. Acta Crystallogr Sect E Struct Rep Online 2008; 64:o2444. [PMID: 21581412 PMCID: PMC2959875 DOI: 10.1107/s1600536808038622] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2008] [Accepted: 11/19/2008] [Indexed: 11/10/2022]
Abstract
The complete molecule of the title compound, C26H20N2, is generated by crystallographic inversion symmetry. The terminal phenyl ring is twisted by 19.2 (1)° with respect to the adjacent phenylene ring.
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Mansor S, Yehye WA, Ariffin A, Rahman NA, Ng SW. Di- n-butylammonium 2-(3,5-di- tert-butyl-4-hydroxybenzylsulfanyl)nicotinate. Acta Crystallogr Sect E Struct Rep Online 2008; 64:o1799. [PMID: 21201778 PMCID: PMC2960651 DOI: 10.1107/s1600536808026202] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2008] [Accepted: 08/13/2008] [Indexed: 05/26/2023]
Abstract
The asymmetric unit of the title compound, C8H20N+·C21H26NO3S−, contains two indpendent ion pairs which are disposed about a psuedo-inversion center, generating an ammonium–carboxylate N—H⋯O hydrogen-bonded four-component cluster. In the crystal structure, adjacent clusters are linked by hydroxy–carboxylate O—H⋯O hydrogen bonds, forming a chain.
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Yehye WA, Rahman NA, Ariffin A, Ng SW. N-Acetyl-2-hydroxy-N'-[methoxy(1-methylindol-2-yl)methyl]benzohydrazide. Acta Crystallogr Sect E Struct Rep Online 2008; 64:o1824. [PMID: 21201799 PMCID: PMC2960481 DOI: 10.1107/s1600536808026846] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2008] [Accepted: 08/20/2008] [Indexed: 11/11/2022]
Abstract
In the crystal structure of the title Schiff-base, C(20)H(21)N(3)O(4), the amino group forms an N-H⋯O hydrogen bond to the acetyl group of an adjacent mol-ecule, forming a zigzag chain. The 2-hydr-oxy group is inter-nally hydrogen bonded to the amido group though an O-H⋯O hydrogen bond.
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Affiliation(s)
- Wagee A. Yehye
- Department of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | | | - Azhar Ariffin
- Department of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Seik Weng Ng
- Department of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia
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Mansor S, Yehye WA, Ariffin A, Rahman NA, Ng SW. 2-(3,5-Di-tert-butyl-4-hydroxy-benzyl-sulfan-yl)nicotinic acid. Acta Crystallogr Sect E Struct Rep Online 2008; 64:o1778. [PMID: 21201758 PMCID: PMC2960523 DOI: 10.1107/s1600536808026056] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2008] [Accepted: 08/13/2008] [Indexed: 11/26/2022]
Abstract
Two molecules of the title compound, C21H27NO3S, are disposed about a center of inversion, generating an O—H⋯O hydrogen-bonded dimer.
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Affiliation(s)
- Shahirah Mansor
- Department of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia
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Yehye WA, Ariffin A, Ng SW. N'-(3,5-Di-tert-butyl-4-hydroxy-benzyl-idene)-2-hydroxy-benzohydrazide methanol solvate. Acta Crystallogr Sect E Struct Rep Online 2008; 64:o1452. [PMID: 21203167 PMCID: PMC2962083 DOI: 10.1107/s1600536808020746] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2008] [Accepted: 07/04/2008] [Indexed: 05/30/2023]
Abstract
The asymmetric unit of the title compound, C(22)H(28)N(2)O(3)·CH(4)O, consists of two independent Schiff base mol-ecules and two independent methanol solvent mol-ecules. In one Schiff base mol-ecule, the 2-hydr-oxy group forms an intra-molecular hydrogen bond with the amide O atom, whereas in the other Schiff base mol-ecule, the 2-hydr-oxy-substituted benzene ring is oriented so that the 2-hydr-oxy group serves as hydrogen-bond acceptor for the amide NH group. In the crystal structure, Schiff base mol-ecules inter-act with methanol solvent to furnish a hydrogen-bonded chain.
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Affiliation(s)
- Wagee A. Yehye
- Department of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Azhar Ariffin
- Department of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Seik Weng Ng
- Department of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia
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Yehye WA, Ariffin A, Ng SW. (2,4-Dimethoxy-benzyl-idene)-2-hydroxy-benzohydrazide ethanol solvate. Acta Crystallogr Sect E Struct Rep Online 2008; 64:o961. [PMID: 21202691 PMCID: PMC2961356 DOI: 10.1107/s1600536808011768] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2008] [Accepted: 04/24/2008] [Indexed: 11/18/2022]
Abstract
In the planar title molecule, C16H16N2O4·C2H6O, the planar Schiff base molecule is linked to the ethanol solvent molecule by a hydroxy–amide hydrogen bond. The hydroxy group of the ethanol molecule is a hydrogen-bond donor to the double-bonded N atom of an adjacent Sciff base, pairs of interactions taking place across a center of symmetry and giving rise to a hydrogen-bonded dimer.
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Affiliation(s)
- Wagee A Yehye
- Department of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia
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Yehye WA, Ariffin A, Ng SW. 2-Hydr-oxy-(2-methyl-1H-indol-3-ylmethyl-idene)benzohydrazide ethanol solvate. Acta Crystallogr Sect E Struct Rep Online 2008; 64:o960. [PMID: 21202690 PMCID: PMC2961492 DOI: 10.1107/s1600536808011756] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2008] [Accepted: 04/24/2008] [Indexed: 11/17/2022]
Abstract
In the title compound, C17H15N3O2·C2H6O, Schiff base molecules are linked by a hydroxy–amido hydrogen bond into a helical chain running along the b axis. This chain is consolidated by two other hydrogen bonds; the ethanol solvent molecule is a hydrogen-bond donor to the amide group and a hydrogen-bond acceptor for the indolyl NH group of an adjacent Schiff base molecule.
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Affiliation(s)
- Wagee A Yehye
- Department of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia
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