Magnetic properties of a new type of 1,5-diphenyl-6-oxo- and -thioxo-verdazyl radicals
Chemical Physics Letters, ISSN: 0009-2614, Vol: 241, Issue: 5, Page: 618-622
1995
- 23Citations
- 4Captures
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Article Description
The magnetic susceptibilities of the 3-(4-chlorophenyl)-1,5-diphenyl-6-oxoverdazyl ( p -CD p OV), 3-(4-bromophenyl)-1,5-diphenyl-6-oxoverdazyl ( p -BD p OV), 1,3,5-triphenyl-6-thioxoverdazyl (TTV), and 3-(4-chlorophenyl)-1,5-diphenyl-6-thioxoverdazyl ( p -CD p TV) radicals have been measured between 4.4 and 300 K. The susceptibility of p -CD p OV and p -BD p OV follows the Curie-Weiss law with a positive and negative Weiss constant of +2.5 and −7.7 K, respectively. On the other hand, the susceptibility of TTV and p -CD p TV can be interpreted in terms of an alternating and nonalternating antiferromagnetic Heisenberg linear chain model with an exchange interaction of 2 J 1 / k = −66.0 K (alternation parameter α = J 2 / J 1 = 0.6) and 2 J / k = −58.5 K, respectively.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/000926149500681S; http://dx.doi.org/10.1016/0009-2614(95)00681-s; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0000036433&origin=inward; http://linkinghub.elsevier.com/retrieve/pii/000926149500681S; http://api.elsevier.com/content/article/PII:000926149500681S?httpAccept=text/xml; http://api.elsevier.com/content/article/PII:000926149500681S?httpAccept=text/plain; https://linkinghub.elsevier.com/retrieve/pii/000926149500681S; http://dx.doi.org/10.1016/0009-2614%2895%2900681-s; https://dx.doi.org/10.1016/0009-2614%2895%2900681-s
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