Sastry, VSS and Ramakrishna, J (1979) Zeeman effect of NQR in 4,6-dichloropyrimidine and 6-chloro 2,4-dimethoxypyrimidine. In: Pramana, 13 (3). pp. 219-222.
fulltext.pdf - Published Version
Restricted to Registered users only
Download (241Kb) | Request a copy
Zeeman (35Cl) NQR studies in polycrystalline samples of 4,6-dichloropyrimidine and 6 chloro 2,4 dimethoxypyrimidine show that the asymmetry at the four chemically inequivalent chlorine sites in the former is about 10%, while in the latter (one line) the asymmetry is almost zero. Using a valence-bond picture, C-Cl bonds in 4,6-dichloropyrimidine have been characterised, and the results are also compared with those in a corresponding benzene compound using a simple molecular orbital calculation. The axial symmetry of C-Cl bond in the second compound has been attributed to mesomeric effects.
|Item Type:||Journal Article|
|Additional Information:||Copy right of this article belongs to Indian Academy of Sciences.|
|Department/Centre:||Division of Physical & Mathematical Sciences > Physics|
|Date Deposited:||05 Jan 2010 05:03|
|Last Modified:||19 Sep 2010 05:50|
Actions (login required)