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Magnetic properties of a penta-coordinated high-spin cobalt(II) complex: acetate-N-methyl-octaethylporphyrinato-cobalt(II)

✍ Scribed by Kouichi Fukui; Hiroaki Ohya-Nishiguchi; Noboru Hirota; Katsuhiro Aoyagi; Hisanobu Ogoshi

Publisher
Elsevier Science
Year
1987
Tongue
English
Weight
435 KB
Volume
140
Category
Article
ISSN
0009-2614

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✦ Synopsis

It is shown by EPR and magnetic susceptibility (x) measurements that acetate-N-methyl-octaethylporphyrinato-Co(I1) has a high-spin ground state. The complex in toluene gives EPR spectra with g= 4.4 and 2.04 and x with kn= 4.4 BM and Dz 20 cm-', which indicates square-pyramidal geometry around Co( II). Data for the undiluted system are analyzed in terms of a dimer model with a small exchange interaction.

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The magnetx parametersg and AC0 of Cosalenpy doped III a Znsalenpy smgle crystal have been measured and the orientatlons of theu pnnc~pal axes ~th respect to the molecular structure hare been determined. Furthermore. the hfs and quadrupole tensor of the anal mtrogen were obtamed from powder ENDOR D