The Magnetic Properties of Verdazyl Free Radicals. VIII. The Crystal Structure of 1,3,5-Tri-p-tolylverdazyl Radical
- 1 March 1975
- journal article
- research article
- Published by Oxford University Press (OUP) in Bulletin of the Chemical Society of Japan
- Vol. 48 (3) , 819-824
- https://doi.org/10.1246/bcsj.48.819
Abstract
The crystal structure of 1,3,5-tri-p-tolylverdazyl has been determined by X-ray diffraction. The crystals are monoclinic, with the space group of P21/m and with a=8.173(3), b=20.23(1), c=6.075(2) Å, β=105.4(1)°, and Z=2. The structure was deduced from the sharpened Patterson synthesis and refined by the block-diagonal least-squares method to the final R value of 0.048 for the 1212 non-zero reflections collected by the counter-method. The sym-tetrazinyl ring has an asymmetrical boat form. The molecules are arranged approximately parallel to the (20\bar1) plane. The maximum intermolecular overlap is observed between the sym-tetrazinyl and C-tolyl groups, suggesting a weak exchange interaction between unpaired electrons.Keywords
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