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Ahmad, Afaq
- Spectrophotometric and Spectroscopic studies of charge transfer complexes of Benzamide as an electron donor with Picric acid as an electron acceptor in different polar solvents
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Authors
Neeti Singh
1,
Afaq Ahmad
1
Affiliations
1 Department of Chemistry, Faculty of Science, Aligarh Muslim University, Aligarh -202002, IN
1 Department of Chemistry, Faculty of Science, Aligarh Muslim University, Aligarh -202002, IN
Source
Asian Journal of Research in Chemistry, Vol 6, No 6 (2013), Pagination: 560-569Abstract
The charge transfer complexes of the donor benzamide (BZ) with π-acceptor picric acid (PA) have been studied spectrophotometrically in various solvents such as carbon tetra chloride, ethanol, and methanol at room temperature using absorption spectrophotometer. The results indicate that formation of CTC in less polar solvent is high. The stoichiometry of the CT complex was found to be 1:1. The physical parameters of CT complex were evaluated by the Benesi-Hildebrand equation. The data are discussed in terms of formation constant (KCT), molar extinction coefficient (δCT), standard free energy (G o ), oscillator strength(ƒ), transition dipole moment (µEN), resonance energy (RN) and ionization potential (ID). The results indicate that the formation constant (K<SUB>CT</SUB>) for the complex were shown to be dependent upon the nature of electron acceptor, donor and polarity of solvents which were used. The results show that a charge transfer molecular complex between picric acid and benzamide stabilized by hydrogen bonding. The formation of the complex has been confirmed by UV-visible, FT-IR, 1 H-NMR, TGA/DTA spectral data methods. On the basis of the studies, the structure of CT complex is [(BZ) + (PA) −] , and a general mechanism for its formation is proposed.Keywords
Charge Transfer complex, Benzamide (BZ), Picric acid (PA), UV-visible, FT-IR, 1H–NMR, TGA/DTAReferences
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- Preparation and spectroscopic studies of charge-transfer complexes of 2, 2-bipyridine and hydroxy benzo pyridine as electron donors with chloranilic acid, 3, 5 di nitro benzoic acid and p-nitro phenol as electron acceptors in methanol
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Authors
Affiliations
1 Department of Chemistry, Aligarh Muslim University, Aligarh
1 Department of Chemistry, Aligarh Muslim University, Aligarh
Source
Asian Journal of Research in Chemistry, Vol 6, No 8 (2013), Pagination: 772-793Abstract
The reactions between 2,2 bipyridine (Bpy) and hydroxy benzo pyridine (8HQ) as electron donors with some acceptors such as chloranilic acid (CAA), 3, 5 di nitro benzoic acid (DNBA) and p-nitro phenol (PNP) were studied at room temperature. Based on FT- IR spectrum of the solid CT complexes along with the UV- visible spectroscopy for the reactions, the data obtained indicate the formation of 1:1 charge-transfer complexes. The infrared and 1H NMR spectroscopic data and XRD spectrum indicate a charge-transfer interaction associated with a proton migration from the acceptor to the donor followed by intermolecular hydrogen bondingKeywords
Charge- Transfer Complexes, 2, 2 Bipyridine, Hydroxy Benzo Pyridine, FT- IR, UV- Visible, 1H NMR, XRDReferences
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- Spectrophotometric and Spectroscopic Studies of Charge Transfer Complexes of M-Nitroaniline as an Electron Donor with Picric Acid as an Electron Acceptor in Different Polar Solvents
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Authors
Affiliations
1 Department of Chemistry, Aligarh Muslim University, Aligarh-202002, IN
1 Department of Chemistry, Aligarh Muslim University, Aligarh-202002, IN