| Main Title |
Intramolecular Motion and Reorientational Barriers in 9-Fluorenone, 4-Methyl-9-Fluorenone and 4,5-Dimethyl-9-Fluorenone. |
| Author |
Wilson, N. K. ;
|
| CORP Author |
Environmental Monitoring Systems Lab., Research Triangle Park, NC. |
| Year Published |
1985 |
| Report Number |
EPA/600/J-85/006; |
| Stock Number |
PB85-167922 |
| Additional Subjects |
Nuclear magnetic resonance ;
Spin lattice relaxation ;
Temperature ;
Molecular rotation ;
Reprints ;
Fluorenone ;
Fluorenone/methyl ;
Fluorenone/dimethyl
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB85-167922 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
6p |
| Abstract |
Carbon-13 nuclear magnetic resonance spin-lattice relaxation times and nuclear Overhauser enhancements were measured as functions of temperature for the hydrogen-bearing carbons in 9-fluorenone, 4-methyl-9-fluorenone, and 4,5-dimethyl-9-fluorenone. Reorientational diffusion constants were obtained from the dipolar T1 values. Isotropic overall molecular motion was assumed, and the methyl group rotation was separated from the overall molecular reorientation by the method of Woessner. Arrhenius plots of the dependence of the rotation rates on temperature provided values of the energy barriers for molecular reorientation and methyl group rotation. |
| Supplementary Notes |
Pub. in Magnetic Resonance in Chemistry, v23 n1 p12-15 Jan 85. |
| NTIS Title Notes |
Journal article. |
| Title Annotations |
Reprint: Intramolecular Motion and Reorientational Barriers in 9-Fluorenone, 4-Methyl-9-Fluorenone and 4,5-Dimethyl-9-Fluorenone. |
| PUB Date Free Form |
1985 |
| Category Codes |
7D; 99F |
| NTIS Prices |
PC A02/MF A01 |
| Primary Description |
600/08 |
| Document Type |
NT |
| Cataloging Source |
NTIS/MT |
| Control Number |
513020473 |
| Origin |
NTIS |
| Type |
CAT |
