Journal ArticleDOI
Quadrupole Resonance Spectrum of Chloranil and Its Hexamethylbenzene Complex
TLDR
The nuclear quadrupole resonance spectrum of chloranil and in the 1: 1 complex with hexamethylbenzene was obtained at 77 tained K and room temperature.Abstract:
The nuclear quadrupole resonance spectrum of Cl in chloranil and in the 1: 1 complex of chloranil with hexamethylbenzene was obtained at 77 tained K and room temperature. The results are used to estimate the upper limit for charge transfer in the complex from chloranil to hexamethylbenzene. Complexes of picrylchloride: hexamethylbenzene and parachloroaniline: sym-trinitrobenzene were also studied but no resonances were detected. (D. L.C.)read more
Citations
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NQR study of complexes between p-dichlorobenzene and some aromatic π acceptors
TL;DR: In this article, the NQR frequencies of charge transfer complexes of p-dichlorobenzene (PDB) with some aromatic π acceptors such as m-nitrobenzaldehyde (MNB), picric acid (PA), PNB, and MDNB were measured at room temperature.
Journal ArticleDOI
Dependence of $^{35}Cl$ NQR on hydrogen bonding and temperature in dichlorophenol–aniline charge transfer complexes
TL;DR: 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(CCl) bond and the percentage charge transfer between the donor–acceptor components in charge transfer complexes.
Journal ArticleDOI
Cl-35 NQR study of cation polarizability in metal salts of monochloro acetic acid
TL;DR: In this paper, a comparative study of nuclear quadrupole resonance frequencies of monochloro acetic acid and its metal salts is carried out and the frequency shifts obtained in the respective metal chloroacetates are used to estimate the changes in the ionicity of C-Cl bond.
Journal ArticleDOI
Observation of several phase transitions in tetrachloro-o-benzoquinone using 35Cl nuclear quadrupole resonance
Marcel Durand,Gérard Jugie +1 more
TL;DR: In this paper, the temperature dependence of the 35 Cl nuclear quadrupole resonance spectra of tetrachloro- o -benzoquinone (TOB) is reported.
References
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Journal ArticleDOI
Pure Nuclear Quadrupole Spectra of Chlorine and Antimony Isotopes in Solids
TL;DR: In this article, the results of experiments on nuclear quadrupole resonances of antimony and chlorine isotopes in solids were compared with theoretical results for quadrupoles and thermal vibrations, and effects of a nuclear hexadecapole.
Journal ArticleDOI
Correlation of Hammett's σ-Values with Electron Densities Calculated by Molecular Orbital Theory
TL;DR: In this paper, it was shown that Hammett's σ−values can be correlated with electron densities calculated by the MO LCAO method, which can be used to calculate reasonable values for absorption frequencies, mesomeric moments, and orienting power of the substituents.
Journal ArticleDOI
Estimates of Hammett's Sigma Values from Quadrupole Resonance Studies
P. J. Bray,R. G. Barnes +1 more
TL;DR: A linear correlation exists between the Cl35 pure quadrupole resonance frequency in substituted chlorobenzenes and the Hammett parameter sigma for the substituent as mentioned in this paper.
Journal ArticleDOI
The structures of molecular compounds exhibiting polarization bonding. II. The crystal structure of the chloranil–hexamethylbenzene complex
T.T. Harding,S. C. Wallwork +1 more