Synthesis, crystallographic and spectrophotometric studies of charge transfer complex formed between 2,2′-bipyridine and 3,5-dinitrosalicylic acid

Nanostructured products of the drug theophylline caused by charge transfer interactions and a binary solvent system: Morphology and nanometry

“…Additionally, the IR spectra of these complexes are characterized by medium bands appearing in the region between 2400 and 2800 cm −1 . The broadened bands present at 2787, 2712, and 2609 cm −1 for the PA and DNBA complexes represent intermolecular hydrogen bonding in the complexes [69]. All these observations indicate that the complexation of TP with the organic acceptors PA or DNBA leads to hydrogen bonding with proton transfer.…”

“…All these observations indicate that the complexation of TP with the organic acceptors PA or DNBA leads to hydrogen bonding with proton transfer. The basic center (C_N) of the TP molecule accepts one hydrogen atom from the acidic center on the PA or DNBA acceptor molecule (OH group) [69][70][71][72][73][74][75].…”

Charge transfer interaction of organic p-acceptors with the anti-hyperuricemic drug allopurinol: Insights from IR, Raman, 1H NMR and 13C NMR spectroscopies

“…The observed shift of the n(C=N) band upon complexation suggests that this group participated directly in complexation. All these observations indicate the presence of hydrogen bonding in this complex (13)(14)(15)(16). When DDQ and CHL acceptor complexed with Allop, the vibrational frequencies n(N-H), d def (N-H) and n(C=N) of Allop slightly shift, which indicates that these groups do not participate in the complexation.…”

“…For example, Singh and Ahmad (13) studied the interaction between p-nitroaniline as a donor and benzoic acid as an acceptor in different polar solvents. Selvakumar et al (14) studied the optical and thermal properties of a 3-nitroanilinium trichloroacetate as a new CT complex, whereas Singh et al (15) prepared a new CT crystal by the interaction between 2,2′-bipyridine as a donor and 3,5-dinitrosalicylic acid as an acceptor. Adam (16) synthesized new nano-structured complexes from the reactions between reserpine and quinidine with chloranilic acid.…”

Synthesis, crystallographic, spectral, and spectrophotometric studies of proton transfer complex of 1,2-dimethylimidazole with 3,5-dinitrobenzoic acid in different polar solvents

“…On the other hand, we have also selected DMI as a good organic base because it can rapidly form cation facilitates a strong attraction with the benzoate anion of DNBA through intermolecular hydrogen bonding (N þ dH/O À ). The study of interaction between DMI and DNBA is one of the most important aspects to determine the molecular structure of the resulting complex and discovering and developing its important significance i.e., analysis of some drugs in pure form [10]. The most special significance to investigate the interaction between DMI and DNBA to know the binding power of the imidazole derivative with organic acceptor DNBA because imidazole derivatives have occupied a unique place in the field of medicinal chemistry.…”