Anisotropic reorientation of nicotine in solution. A carbon-13 spin-lattice relaxation time study of molecular conformation

1980 ◽  
Vol 102 (16) ◽  
pp. 5149-5150 ◽  
Author(s):  
T. Phil Pitner ◽  
Jerry F. Whidby ◽  
William B. Edwards
Keyword(s):  
Relaxation Time ◽  
Molecular Conformation ◽  
Lattice Relaxation ◽  
Lattice Relaxation Time ◽  
Spin Lattice Relaxation ◽  
Time Study ◽  
Spin Lattice Relaxation Time ◽  
Spin Lattice

Barriers to rotation of the cyclopentadienyl ligand: spin-lattice relaxation time measurements and atom–atom potential calculations on cyclopentadienyl manganese and rhenium tricarbonyl and vanadium tetracarbonyl complexes

1983 ◽  
Vol 61 (4) ◽  
pp. 737-742 ◽  
Author(s):  
D. F. R. Gilson ◽  
G. Gomez ◽  
I. S. Butler ◽  
P. J. Fitzpatrick
Keyword(s):  
Relaxation Time ◽  
Molecular Conformation ◽  
Crystal Packing ◽  
Solid Phase ◽  
Lattice Relaxation ◽  
Lattice Relaxation Time ◽  
Spin Lattice Relaxation ◽  
Spin Lattice Relaxation Time ◽  
Spin Lattice ◽  
Atom Potential

The barriers to cyclopentadienyl ring rotation in the solid phase have been measured by spin-lattice relaxation time methods for the organometallic complexes CpMn(CO)3 (7.24 kJ mol−1), CpRe(CO)3 (7.15 kJ mol−1), and CpV(CO)4 (7.07 kJ mol−1), where Cp = η5-C5H5. Nonbonded atom–atom potential calculations of the barriers in these complexes and in BzCr(CO)3 (Bz = η6-C6H6) show that the molecular conformation of the Mn and Re compounds is determined by crystal packing forces and that concerted ring motions are possible for the cyclopentadienyl complexes, but not for the benzene chromium tricarbonyl.

Aryl Ring Rotation in Porphyrins. A Carbon-13 NMR Spin−Lattice Relaxation Time Study

1997 ◽  
Vol 101 (3) ◽  
pp. 458-465 ◽  
Author(s):  
Lori Noss ◽  
Paul A. Liddell ◽  
Ana L. Moore ◽  
Thomas A. Moore ◽  
Devens Gust
Keyword(s):  
Relaxation Time ◽  
Lattice Relaxation ◽  
Lattice Relaxation Time ◽  
Spin Lattice Relaxation ◽  
Time Study ◽  
Aryl Ring ◽  
Spin Lattice Relaxation Time ◽  
Spin Lattice ◽  
Ring Rotation
Sign in / Sign up

Export Citation Format

Share Document