The Observation of Positive Temperature Coefficients in the Bromine Nuclear Quadrupole Resonance Spectra of the Diethylammonium Salts of Hexabromoantimony(III) and Hexabromobismuth(III)

1971 ◽  
Vol 75 (12) ◽  
pp. 1898-1900 ◽  
Author(s):  
T Brill
Keyword(s):  
Nuclear Quadrupole Resonance ◽  
Positive Temperature ◽  
Temperature Coefficients ◽  
Quadrupole Resonance ◽  
Nuclear Quadrupole

Temperature and Pressure Dependence of 35Cl Nuclear Quadrupole Resonance in BiCl3

1973 ◽  
Vol 51 (14) ◽  
pp. 2290-2291 ◽  
Author(s):  
G. C. Gillies ◽  
R. J. C. Brown
Keyword(s):  
Nuclear Quadrupole Resonance ◽  
Pressure Dependence ◽  
Constant Pressure ◽  
Temperature Coefficients ◽  
Quadrupole Resonance ◽  
Intermolecular Bonding ◽  
Temperature And Pressure ◽  
Nuclear Quadrupole ◽  
35Cl Nuclear Quadrupole Resonance ◽  
Volume Effects

The temperature and pressure dependences of the two 35Cl nuclear quadrupole resonances in BiCl3 have been measured. At constant pressure, the temperature coefficients are markedly different and this difference is shown to be due to volume effects associated with different intermolecular bonding.

Chlorine Nuclear Quadrupole Resonance Spectra of 1-Substituted 2-Chloropolyfluorocycloalkenes

1974 ◽  
Vol 52 (20) ◽  
pp. 3484-3488 ◽  
Author(s):  
Lian Sai Chia ◽  
William R. Cullen ◽  
Michael C. L. Gerry ◽  
Poh Siew Yiaw
Keyword(s):  
Nuclear Quadrupole Resonance ◽  
Ring Size ◽  
Temperature Coefficients ◽  
Mean Temperature ◽  
Resonance Frequencies ◽  
Quadrupole Resonance ◽  
The Mean ◽  
Nuclear Quadrupole

Chlorine nuclear quadrupole resonance frequencies are reported for the compounds [Formula: see text] (n = 2,3,4; Y = H, CH3, C2H5, Si(CH3)3, F. OCH3, N3, NR2, Cl, SCH3, P(C6H5)2, As(CH3)2, Mn(CO)5, π-C5H5Fe(CO)2, but not all combinations). The values range from 38.999 MHz (n = 3; Y = F) to 34.668 MHz (n = 2; Y = π-C5H5Fe(CO)2) and are roughly related to the electronegativity of Y and to the ring size. The mean temperature coefficients of the frequencies lie in the range −0.9 × 10−4 to −8 × 10−4/°K.

Study of polymorphism and torsional motions in 3-chloro-4-methylaniline using 35Cl NQR (nuclear quadrupole resonance)

1992 ◽  
Vol 70 (2-3) ◽  
pp. 119-121 ◽  
Author(s):  
S. K. Roy ◽  
B. Amitha ◽  
J. Uchil
Keyword(s):  
Nuclear Quadrupole Resonance ◽  
The Other ◽  
Temperature Coefficients ◽  
Β Phase ◽  
Time Out ◽  
Quadrupole Resonance ◽  
35Cl Nqr ◽  
Nuclear Quadrupole ◽  
Two Phases ◽  
First Time

35Cl nuclear quadrupole resonance (NQR) in three polymorphic phases of 3-chloro-4-methylaniline is detected for the first time. Out of these, two phases (α and γ) are stable and the other (β) is found to be metastable. The β phase is found to transform to the stable γ phase with respect to time. The formation of the β and γ phases are discussed in terms of defects and strains. The temperature dependence of NQR lines in the range 77–292 K in all three phases is studied in detail. On the basis of a modified Bayer's theory the torsional frequencies and their temperature coefficients are computed.

Remote nuclear quadrupole resonance in solids

1993 ◽  
Vol 163 (10) ◽  
pp. 95 ◽  
Author(s):  
Vadim S. Grechishkin ◽  
Nikolai Ya. Sinyavskii
Keyword(s):  
Nuclear Quadrupole Resonance ◽  
Quadrupole Resonance ◽  
Nuclear Quadrupole
Sign in / Sign up

Export Citation Format

Share Document