15Cl NQR study of charge-transfer complexes

Ramananda, D.; Uchil, J.

doi:10.1016/0022-2860(93)07932-m

Cited by 10 publications

(3 citation statements)

References 10 publications

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“…13 As the signals are quite weak, as seen on the oscilloscope, recording was preferred for detection of the NQR signals and the measurement of frequency. The signal-to-noise ratio was in the range of 3-4.…”

Section: Measurement Of Nqr Frequencymentioning

confidence: 99%

Dependence of ³⁵Cl NQR on hydrogen bonding and temperature in dichlorophenol–aniline charge transfer complexes

Ramananda

Ramesh

Uchil³

2007

Magnetic Reson in Chemistry

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The hydrogen-bonded charge transfer complexes of aniline with pi-acceptors (or proton donors) such as 2,5-, 2,6-, 3,4- and 3,5-dichlorophenol were prepared. The (35)Cl nuclear quadrupole resonance (NQR) frequencies of these charge transfer complexes in the temperature range 77-300 K were measured to ascertain the existence or otherwise of a phase transition upon complex formation. Further, the NQR frequency and asymmetry parameter of the electric field gradient at the site of quadrupole nucleus were used to estimate the chemical bond parameters, namely ionic bond, double bond character of the carbon-chlorine(C--Cl) bond and the percentage charge transfer between the donor-acceptor components in charge transfer complexes. The effect of hydrogen bonding and temperature on the charge transfer process is analysed.

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Section: Measurement Of Nqr Frequencymentioning

confidence: 99%

Dependence of ³⁵Cl NQR on hydrogen bonding and temperature in dichlorophenol–aniline charge transfer complexes

Ramananda

Ramesh

Uchil³

2007

Magnetic Reson in Chemistry

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“…The NQR frequencies of these compounds are observed using a home-made frequency modulated, self quenched, super regenerative oscillator (SRO) of Dean's type coupled with a lock-in amplifier and strip chart recorder [21]. NQR resonance signals of metal chloroacetates are weak in comparison with that of monochloro acetic acid.…”

Section: Measurement Of Nqr Frequencymentioning

confidence: 99%

³⁵Cl NQR Study of Cation Polarizability in Metal Salts of Monochloro Acetic Acid

et al. 2008

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Various metal salts (Na, K, Rb, and NH4) of monochloro acetic acid were prepared and the 35 Cl nuclear quadrupole resonance frequencies were measured at room temperature. A comparative study of nuclear quadrupole resonance frequencies of monochloro acetic acid and its metal salts is carried out. The frequency shifts obtained in the respective metal chloroacetates are used to estimate the changes in the ionicity of C-Cl bond. Further, the changes in the ionicity of C-Cl bond were used to estimate the percentage of intra-molecular charge transfer between respective cation-anion of the metal salts of chloro acetic acid. The nuclear quadrupole resonance frequency is found to decrease with increasing ionicity of the alkali metal ion.

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“…The following supporting information can be downloaded at: , Computational method, Tables of calculated absolute and relative energies, Pictures and Cartesian Coordinates of all optimized structures, IRCs from the TSs for the chlorination and solvolysis of 1a’ , physical and NMR data of aryl halides 2, 4, 5 and NMR of glycerol/KBr solvent system can be downloaded at: . References [ 58 , 59 , 60 , 61 , 62 , 63 , 64 , 65 , 66 , 67 , 68 , 69 , 70 , 71 , 72 , 73 , 74 , 75 , 76 , 77 , 78 , 79 , 80 , 81 , 82 ] are cited in the supplementary materials.…”

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Copper-Free Halodediazoniation of Arenediazonium Tetrafluoroborates in Deep Eutectic Solvents-like Mixtures

et al. 2022

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Deep Eutectic Solvent (DES)-like mixtures, based on glycerol and different halide organic and inorganic salts, are successfully exploited as new media in copper-free halodediazoniation of arenediazonium salts. The reactions are carried out in absence of metal-based catalysts, at room temperature and in a short time. Pure target products are obtained without the need for chromatographic separation. The solvents are fully characterized, and a computational study is presented aiming to understand the reaction mechanism.

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15Cl NQR study of charge-transfer complexes

Cited by 10 publications

References 10 publications

Dependence of ³⁵Cl NQR on hydrogen bonding and temperature in dichlorophenol–aniline charge transfer complexes

Dependence of ³⁵Cl NQR on hydrogen bonding and temperature in dichlorophenol–aniline charge transfer complexes

³⁵Cl NQR Study of Cation Polarizability in Metal Salts of Monochloro Acetic Acid

Copper-Free Halodediazoniation of Arenediazonium Tetrafluoroborates in Deep Eutectic Solvents-like Mixtures

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15Cl NQR study of charge-transfer complexes

Cited by 10 publications

References 10 publications

Dependence of 35Cl NQR on hydrogen bonding and temperature in dichlorophenol–aniline charge transfer complexes

Dependence of 35Cl NQR on hydrogen bonding and temperature in dichlorophenol–aniline charge transfer complexes

35Cl NQR Study of Cation Polarizability in Metal Salts of Monochloro Acetic Acid

Copper-Free Halodediazoniation of Arenediazonium Tetrafluoroborates in Deep Eutectic Solvents-like Mixtures

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Dependence of ³⁵Cl NQR on hydrogen bonding and temperature in dichlorophenol–aniline charge transfer complexes

Dependence of ³⁵Cl NQR on hydrogen bonding and temperature in dichlorophenol–aniline charge transfer complexes

³⁵Cl NQR Study of Cation Polarizability in Metal Salts of Monochloro Acetic Acid