Temperature dependence of the frequency of nuclear quadrupole resonance in the 60?300�K region

1970 ◽  
Vol 13 (5) ◽  
pp. 711-715
Author(s):  
I. V. Vorob'ev ◽  
A. D. Brodskii
Keyword(s):  
Temperature Dependence ◽  
Nuclear Quadrupole Resonance ◽  
Quadrupole Resonance ◽  
Nuclear Quadrupole

The Complex between Chloromethane and Benzene

1986 ◽  
Vol 41 (1-2) ◽  
pp. 208-210 ◽  
Author(s):  
Daniel Rupp ◽  
Edwin A. C. Lucken
Keyword(s):  
Raman Spectroscopy ◽  
Temperature Dependence ◽  
Nuclear Quadrupole Resonance ◽  
Isotope Effect ◽  
Crystalline Phase ◽  
Enthalpy Of Fusion ◽  
Deuterium Isotope Effect ◽  
Quadrupole Resonance ◽  
Nuclear Quadrupole

35Cl Nuclear Quadrupole Resonance, NQR, spectra of mixtures of Chloromethane and Benzene, with relative molar compositions in the range 1:3 to 3:1, and at temperatures in the range 77 K to 180 K, reveals the presence of a new crystalline phase, in addition to that of pure Chloromethane. The temperature-dependence and the deuterium isotope effect of this new resonance show that the chloromethane molecule is much more labile in the new crystalline phase than in pure chloromethane. The existence of the new crystalline phase is confirmed by Differential Thermal Approach, DTA, which in addition provides evidence that the complex has a 1:1 composition and that the enthalpy of fusion is ≈ 660 cal./mole. Raman spectroscopy provides further evidence of the existence of the complex.

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