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Two aminobenzoic acid based crystalline imines ( and ) were synthesized through a condensation reaction of 4-aminobenzoic acid and substituted benzaldehydes. Single-crystal X-ray diffraction was employed for the determination of structures of prepared Schiff bases. The stability of super molecular structures of both molecules was achieved by intramolecular H-bonding accompanied by strong, as well as comparatively weak, intermolecular attractive forces. The comparative analysis of the non-covalent forces in and was performed by Hirshfeld surface analysis and an interaction energy study between the molecular pairs. Along with the synthesis, quantum chemical calculations were also accomplished at M06/6-311G (d, p) functional of density functional theory (DFT). The frontier molecular orbitals (FMOs), molecular electrostatic potential (MEP), natural bond orbitals (NBOs), global reactivity parameters (GRPs) and natural population (NPA) analyses were also carried out. The findings of FMOs found that for was examined to be smaller (3.477 eV) than that of (3.7933 eV), which indicated a greater charge transference rate in . Further, the NBO analysis showed the efficient intramolecular charge transfer (ICT), as studied by Hirshfeld surface analysis.
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http://dx.doi.org/10.3390/molecules28072967 | DOI Listing |
Chem Asian J
December 2024
IIT Bhilai: Indian Institute of Technology Bhilai, Chemistry, INDIA.
Investigating solid-state photoreactivity, driven by crystal packing, has been a major enduring research theme in Crystal Engineering. Trans-3-styryl pyridine (3-StPy), an unsymmetric olefin, is photo-stable. However, when converted to a series of salts, they exhibited solid-state photoreactivity under UV irradiation.
View Article and Find Full Text PDFRSC Adv
December 2024
Beijing City Key Laboratory of Polymorphic Drugs, Center of Pharmaceutical Polymorphs, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College Beijing 100050 P.R. China
This study presents the synthesis and characterization of novel cocrystal structures of theophylline (THE) with the amino acids gamma-aminobutyric acid (GABA) and l-arginine (ARG). Despite a large number of reports about THE cocrystals, no crystallographic parameters of cocrystals formed by THE and amino acids have been reported. THE is characterized by low solubility, while amino acids as cocrystal co-formers (CCFs) are increasingly recognized for their high solubility and safety.
View Article and Find Full Text PDFActa Crystallogr E Crystallogr Commun
October 2024
The mol-ecule of the title compound, [Ni(CHO)(CHN)(HO)]·CHOH, has triclinic () symmetry. This compound is of inter-est for its anti-microbial properties. The asymmetric unit comprises two independent complex mol-ecules, which are linked by N-H⋯O and O-H⋯O hydrogen bonds along [111].
View Article and Find Full Text PDFActa Crystallogr E Crystallogr Commun
October 2024
Rigaku Americas Corporation, The Woodlands Texas 77381 USA.
The crystal structure of the title compound, [Ni(CHN)(NO)]NO, at room temperature, has monoclinic (2/) symmetry. The structure displays inter-molecular hydrogen bonding. The nickel displays a distorted bipyramidal geometry with the symmetric bidentate bonded nitrate occupying an equatorial site.
View Article and Find Full Text PDFActa Crystallogr E Crystallogr Commun
October 2024
Laboratory of Materials Chemistry (LR13ES08), Faculty of Sciences of Bizerte, University of Carthage, 7021 Zarzouna, Bizerte, Tunisia.
In the title salt, CHN ·HPO , the complete dication is generated by a crystallographic centre of symmetry with the methyl groups in equatorial orientations. The complete dianion is generated by a crystallographic twofold axis with the central O atom lying on the axis: the P-O-P bond angle is 135.50 (12)°.
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