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  Magnetic-properties of 1,4-dihydro-1,2,4-benzotriazin -4-yl radicals

Mukai, K., Inoue, K., Achiwa, N., Jamali, J. B., Krieger, C., & Neugebauer, F. A. (1994). Magnetic-properties of 1,4-dihydro-1,2,4-benzotriazin -4-yl radicals. Chemical Physics Letters, 224(6), 569-575. doi:10.1016/0009-2614(94)00586-9.

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ChemPhysLett_224_1994_569.pdf (Any fulltext), 370KB
 
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Mukai, Kazuo, Author
Inoue, Keiichi, Author
Achiwa, Norio, Author
Jamali, Javad B., Author
Krieger, Claus1, Author           
Neugebauer, Franz A.1, Author           
Affiliations:
1Department of Organic Chemistry, Max Planck Institute for Medical Research, Max Planck Society, ou_1497706              

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 Abstract: Magnetic susceptibilities of 1,4-dihydro-1,3-diphenyl-1,2,4-benzotriazin-4-yl (DDB 1), 3-tert-butyl-1,4-dihydro-1-phenyl-1,2,4- benzotriazin-4-yl (BDPB 2) and 1-(4-chlorophenyl)-1,4-dihydro-3-phenyl-1,2,4-benzotriazin-4-yl (CDPB 3) radicals have been measured in the temperature range of 4.2-300 K. The susceptibility of DDB 1 and BDPB 2 follows the Curie-Weiss law with a negative Weiss constant of −2.2 and −0.3 K, respectively. The magnetic susceptibility of CDPB 3, on the other hand, exhibits a broad maximum at 138 K. This susceptibility can be interpreted in terms of an alternating antiferromagnetic Heisenberg linear chain model with an exchange interaction of 2J1/k=−220 K and an alternation parameter of α=J2/J1=0.3. The results of the X-ray structure analysis of CDPB 3 support the above explanation.

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Language(s): eng - English
 Dates: 1994-04-131994-05-192001-11-281994-07-22
 Publication Status: Issued
 Pages: 7
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: eDoc: 665378
DOI: 10.1016/0009-2614(94)00586-9
Other: 6626
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Title: Chemical Physics Letters
  Other : Chem. Phys. Lett.
Source Genre: Journal
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Publ. Info: Amsterdam : North-Holland
Pages: - Volume / Issue: 224 (6) Sequence Number: - Start / End Page: 569 - 575 Identifier: ISSN: 0009-2614
CoNE: https://pure.mpg.de/cone/journals/resource/954925389241