Synthesis, Crystal structure, Hirshfeld surface analysis, spectral and quantum chemical studies of pharmaceutical cocrystals of a bronchodilator drug (Theophylline)

2021 ◽  
pp. 131585
Author(s):  
L. Mary Novena ◽  
S. Athimoolam ◽  
R. Anitha ◽  
S. Asath Bahadur
Keyword(s):  
Crystal Structure ◽  
Surface Analysis ◽  
Quantum Chemical ◽  
Hirshfeld Surface ◽  
Hirshfeld Surface Analysis ◽  
Pharmaceutical Cocrystals ◽  
Chemical Studies ◽  
Quantum Chemical Studies

scholarly journals Crystal structure and Hirshfeld surface analysis of 1-[(benzyldimethylsilyl)methyl]-1-ethylpiperidin-1-ium ethanesulfonate

2022 ◽  
Vol 78 (2) ◽  
Author(s):  
Jan-Lukas Kirchhoff ◽  
Stephan G. Koller ◽  
Kathrin Louven ◽  
Carsten Strohmann
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Quantum Chemical Calculations ◽  
Surface Analysis ◽  
Intermolecular Interactions ◽  
Quantum Chemical ◽  
Crystal Packing ◽  
Hirshfeld Surface ◽  
Hirshfeld Surface Analysis ◽  
Molecular Salt

The title molecular salt, C17H30NSi+·C2H5O4S−, belongs to the class of a-aminosilanes and was synthesized by the alkylation of 1-[(benzyldimethylsilyl)methyl]piperidine using diethyl sulfate. This achiral salt crystallizes in the chiral space group P21. One of the Si—C bonds in the cation is unusually long [1.9075 (12) Å], which correlates with the adjacent quaternary N+ atom and was verified by quantum chemical calculations. In the crystal, the components are linked by weak C—H...O hydrogen bonds: a Hirshfeld surface analysis was performed to further investigate these intermolecular interactions and their effects on the crystal packing.

2,4-Diamino-6-phenyl-1,3,5-triazin-1-ium nitrate: intriguing crystal structure with high Z′/Z′′ and hydrogen bond numbers and Hirshfeld surface analysis of intermolecular interactions

CrystEngComm ◽  
2021 ◽  
Author(s):  
Nicoleta Caimac ◽  
Elena Melnic ◽  
Diana Chisca ◽  
Marina S. Fonari
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Surface Analysis ◽  
Intermolecular Interactions ◽  
Title Compound ◽  
Ionic Species ◽  
Hirshfeld Surface ◽  
Hirshfeld Surface Analysis ◽  
Asymmetric Unit ◽  
Space Group

The title compound crystallises in the triclinic centrosymmetric space group P1̄ with an intriguing high number of crystallographically unique binary salt-like adducts (Z′ = 8) and a total number of ionic species (Z′′ = 16) in the asymmetric unit.

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