The 35Cl nuclear quadrupole resonance spectra of BCl3 and several of its amine and nitrile complexes

1970 ◽  
Vol 48 (5) ◽  
pp. 697-704 ◽  
Author(s):  
M. Kaplansky ◽  
M. A. Whitehead
Keyword(s):  
Nuclear Quadrupole Resonance ◽  
Molecular Orbital ◽  
Amine Complexes ◽  
Resonance Frequencies ◽  
Quadrupole Resonance ◽  
Temperature Dependences ◽  
Nuclear Quadrupole ◽  
35Cl Nuclear Quadrupole Resonance

The 35Cl nuclear quadrupole resonance frequencies of BCl3, two amine complexes, and five nitrile complexes of BCl3 are reported for 77 °K. Two molecular orbital theories, BEEM-π and CNDO, are used to interpret the frequencies.The temperature dependences of the 35Cl nuclear quadrupole resonance frequencies of B-trichloroborazole are reported.

Nuclear quadrupole resonance and intermolecular interactions: temperature and pressure effects in Group V trichlorides

1976 ◽  
Vol 54 (14) ◽  
pp. 2266-2279 ◽  
Author(s):  
Grant Callum Gillies ◽  
Richard Julian Challis Brown
Keyword(s):  
Nuclear Quadrupole Resonance ◽  
Pressure Coefficient ◽  
Pressure Effects ◽  
Group V ◽  
Resonance Frequencies ◽  
Quadrupole Resonance ◽  
Temperature Dependences ◽  
Intermolecular Bonding ◽  
Temperature And Pressure ◽  
Nuclear Quadrupole

Nuclear quadrupole resonance frequencies for the metal and chlorine atoms in AsCl3 and SbCl3 have been measured as functions of temperature and pressure. These data are analysed to obtain the isothermal volume dependences and the isochoric temperature dependences of the field gradient parameters. Existing knowledge of the Group V trichlorides shows that the strength of intermolecular bonding increases in the order AsCl3 < SbCl3 < BiCl3, and this trend is reflected in the relative importance of volume effects in determining the nqr frequencies in these solids. A simple theory of the pressure dependences of nqr frequencies in molecular crystals is proposed, which accounts for all data presently available. The pressure coefficient contains static and dynamic contributions which are of opposite signs; the static contribution is negative and becomes numerically larger as the strength of intermolecular bonding increases.

Temperature dependence of the 35Cl nuclear quadrupole resonance frequencies of the trimeric and tetrameric phosphonitrilic chlorides

1967 ◽  
Vol 45 (14) ◽  
pp. 1669-1676 ◽  
Author(s):  
M. Kaplansky ◽  
M. A. Whitehead
Keyword(s):  
Temperature Dependence ◽  
Nuclear Quadrupole Resonance ◽  
Unit Cell ◽  
Crystallographic Data ◽  
Chlorine Atoms ◽  
Resonance Frequencies ◽  
Quadrupole Resonance ◽  
Nuclear Quadrupole ◽  
35Cl Nuclear Quadrupole Resonance

The 35Cl nuclear quadrupole resonance frequencies of the trimeric and tetrameric phosphonitrilic chlorides have been studied as a function of temperature. Two forms of the tetramer were used and the differences in their spectra ascribed to crystallographic effects. Correlation of each of the lines in the trimer to a set of chlorine atoms in the unit cell were attempted using crystallographic data.

35Cl Nuclear Quadrupole Resonance in NH4H(ClCH2COO)2

1968 ◽  
Vol 25 (1) ◽  
pp. 291-291 ◽  
Author(s):  
Taisei Yamamoto ◽  
Nobuo Nakamura ◽  
Hideaki Chihara
Keyword(s):  
Nuclear Quadrupole Resonance ◽  
Quadrupole Resonance ◽  
Nuclear Quadrupole ◽  
35Cl Nuclear Quadrupole Resonance
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