| | 1 | Author
| IgorA. Kyuntsel | Requires cookie* | | | Title
| C1 NQR Study of Thermoactivated Motions of Nitro Groups in Picryl Chloride  | | | | Abstract
| The temperature dependences of the 35 C1 NQR frequency (v), spin-lattice relaxation time (T^), and spin-spin relaxation time (T 2) have been studied in 2,4,6-trinitrochlorobenzene (picryl chloride) from 77 K up to the melting point (354 K). The 7\ (T) curve exhibits a pronounced composite mimimum near 300 K which gives evidence for the reorientations of the two ort ho-N0 2 groups around their two-fold symmetry axes with the activation energies of 27.4 kJ mol 1 and 31.2 kJ mol 1 . These values can be related to the ortho-N0 2 groups having the twist angles of 33° and 81°, respectively (the crystal structure of picryl chloride is known). The T 2 (T) dependence exhibits interesting features, too: a deep minimum about 140 K and a new rapid decrease above 270 K. | | | |
Reference
| Z. Naturforsch. 51a, 713—715 (1996); received October 10 1995 | | | |
Published
| 1996 | | | |
Keywords
| NQR, reorientation motion, nitro group | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_A/51/ZNA-1996-51a-0713.pdf | | | | Identifier
| ZNA-1996-51a-0713 | | | | Volume
| 51 | |
|
