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Sheshadri S.N.,GSSS Institute of Engineering Technology for Women | Nagendra P.,BET Academy of Higher Education | Siddaraju B.P.,Cauvery Institute of Technology | Hemakumar K.H.,Cambridge Institute of Technology | And 3 more authors.
Acta Crystallographica Section E: Crystallographic Communications | Year: 2015

The title compound, C16H26NO2 +·C7H5O2 -, is a benzoate salt of the painkiller Tramadol. The six-membered cyclohexane ring of the cation adopts a slightly distorted chair conformation and carries OH and 3-methoxyphenyl substituents at the 2-position and a protonated methylazaniumylmethyl group at the 3-position. In addition, a weak intramolecular C - H⋯O hydrogen bond is observed in the cation. In the crystal, weak O - H⋯O, N - H⋯O and C - H⋯O hydrogen bonds link the components into chains along [010]. A C - H⋯π contact is also observed. Source


Song Y.,Donghua University | Chidan Kumar C.S.,G Madegowda Institute Of Technology | Nethravathi G.B.,BET Academy of Higher Education | Naveen S.,Bangalore University | Li H.,Donghua University
Acta Crystallographica Section E: Structure Reports Online | Year: 2012

In the title salt {systematic name: 4-diphenylmethyl-1-[(E)-3-phenylprop-2- en-1-yl]piperazin-1-ium 2,4,6-trinitrophenolate), C26H 29N2+·C6H2N 3O7-, the cinnarizinium cation is protonated at the piperazine N atom connected to the styrenylmethyl group; the piperazine ring adopts a distorted chair conformaiton. In the crystal, bifurcated N - H⋯(O,O) hydrogen bonds link the components into two-ion aggregates. Source


Anuradha V.,Dr. M.G.R. Educational and Research Institute | Nagendra P.,BET Academy of Higher Education | Kumar S.M.,University of Mysore | Siddaraju B.P.,G Made Gowda Institute Of Technology | Lokanath N.K.,University of Mysore
Acta Crystallographica Section E: Structure Reports Online | Year: 2014

In the title compound, C14H12Br2O, the dihedral angle between the aromatic rings is 2.7 (3)- and the Br atoms lie on the same side of the molecule. No intermolecular interactions occur in the crystal beyond van der Waals contacts. Source


Anuradha V.,Dr. M.G.R. Educational and Research Institute | Madan Kumar S.,University of Mysore | Siddaraju B.P.,BET Academy of Higher Education | Lokanath N.K.,University of Mysore | Nagendra P.,BET Academy of Higher Education
Acta Crystallographica Section E: Structure Reports Online | Year: 2013

In the title salt, C14H20NO+· Cl-, the piperidine ring adopts a chair conformation. In the crystal, the cations and anions are linked by classical N-H⋯Cl hydrogen bond and weak C-H⋯Cl and C-H⋯O hydrogen bonds; the C-H⋯O hydrogen bonds exhibit R2 2(14) ring motifs while the C-H⋯Cl hydrogen bonds link the molecules into chains along the a-axis direction. π-π stacking is observed between parallel phenyl rings of adjacent cations, the centroid-centroid distance being 3.8164 (15) Å. Source


Anuradha V.,Dr. M.G.R. Educational and Research Institute | Kumar S.M.,University of Mysore | Siddaraju B.P.,BET Academy of Higher Education | Lokanath N.K.,University of Mysore | Nagendra P.,BET Academy of Higher Education
Acta Crystallographica Section E: Structure Reports Online | Year: 2014

In the title compound, C8H9NO5S, the dihedral angle between the benzene ring and the nitro group is 5.86(15)° and the C - C - O - S group adopts an anti conformation [torsion angle = -168.44(15)°]. In the crystal, molecules are linked by C - H⋯O hydrogen bonds, generating a three-dimensional network. © 2014 CrossMark. Source

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