@article{oai:kindai.repo.nii.ac.jp:00019947,
 author = {Suenaga, Yusaku and lnomata, Masataka and Yabumoto, Shiomi and Yamaguchi, Ryotaro and Okubo, Takashi and Maekawa, Masahiko and Takayoshi, Kuroda-Sowa},
 issue = {30},
 journal = {理工学総合研究所研究報告, Annual reports by Science and Technology Research Institute},
 month = {Feb},
 note = {[Abstract] Three tri-nuclear cobalt complexes ([Co3(tpa)3(L)](BF4)4 (1) (tpa=tris(2-pyridylmethyl)amine),[Co3(Metpa)3(L)](BF4)4 (2) (Metpa=(6-methyl-2-pyridylmethyl)bis(2-pyridylmethyl)amine) and [Co3(Me2tpa)3(L)](BF4)3 (3) (Me2tpa=bis(6-methyl-2-pyridylmethyl)(2-pyridylmethyl)amine)) with 2,3,6,7,10,11hexahydroxytriphenylene (H6L) and three spieces ancillary ligands have been prepared. Tri-nuclear mixed-valence Co complex (3) is prepared from methanol solution. Complex (3) has consist in that the valence of two cobalt ions have +III,one cobalt ion has +II and the tris-dioxolene bridging ligand is formally in the -5 [cat,cat,sq] oxidation state. Complex (3) shows evidence of temperature dependence of the charge distribution, displaying thermally induced valence tautomeric transition from {(ls-CoIII)2(hs-CoII)}-L(cat,cat,sq) to {(ls-CoIII)(hs-CoII)2}-L(cat,sq,sq) in both solid and solution states. On the other hand, complex (1) and complex (2) are stable in the entire temperature range investigated.Various-temperature magnetic susceptibility data for the compound displayed little variation in the range 2-380 K, and the reason caused the distinct charge distribution on Co-L (L: bridging ligand) by the natural rigidity of the tripodal ligands. These results appeared methylation of the 6-position of the pyridine rings in ancillary ligand effect on redox state in the complex, occuring the distribution of electrons between the cobalt centers and the bridging ligand., application/pdf},
 pages = {1--10},
 title = {Valence Tautomeric Behavior of Tri-nuclear Mixed-Valence CoIII/CoII Complex containing 2, 3, 6, 7,10, 11-Hexahydroxytriphenylene (Ｈ6Ｌ)},
 year = {2018},
 yomi = {スエナガ, ユウサク and イノマタ, マサタカ and ヤブモト, シオミ and ヤマグチ, リョウタロウ and オオクボ, タカシ and マエカワ, マサヒコ and クロダ-ソワ, タカヨシ}
}