Hisashi Okawa
Kyushu University
296 Papers
4.4K Citations
Hisashi Okawa is an academic researcher from Kyushu University. The author has contributed to research in topics: Copper & Crystal structure. The author has an hindex of 40, co-authored 296 publications.
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Papers
Stepwise synthesis and magnetic control of trimetallic magnets [Co2Ln(L)2(H2O)4][Cr(CN)6].nH2O (Ln = La, Gd; H2L = 2,6-Di(acetoacetyl)pyridine) with 3-D pillared-layer structure.
TL;DR: Integration of mononuclear [Cr(CN)6]3- and preorganized trinuclear [Co2Ln(L)2]3+ complexes provides novel trimetallic magnets having a 3-D pillared-layer framework with an alternate array of 2-D layer extended by Cr(III)-CN-Co(II) linkages and Ln(III) ion.
Coordination-Position Isomeric MIICuII and CuIIMII (M = Co, Ni, Zn) Complexes Derived from Macrocyclic Compartmental Ligands
TL;DR: The X-ray crystallographic results demonstrate the M(II) to reside in the N(amine)(2)O(2) site and the Cu(II).
Oxalate-bridged dinuclear Cr(III)-M(II) (M = Cu, Ni, Co, Fe, Mn) complexes: Synthesis, structure, and magnetism
TL;DR: In this paper, the following oxalate-bridged heterodinuclear Cr(III)M(II) (M=Cu, Ni, Co, Fc, Mn) complexes have been synthesized: [Cr(salen)(ox)Cu(acpy)] (1) (salen= N,N'-ethylenebis(salicylideneaminate), ox 2- =oxalate ion, acpy =N-acctylacetonylidene-N-(2-pyridylethyl)aminate)
Structure and reactivity of the cyclic tetranuclear palladium(II) complexes having o-phenylene, dialkyl sulfide and acetato as bridging ligands
TL;DR: A mixture of palladium(II) acetate and dialkyl sulfide in a molar ratio of 1:2/3 is refluxed in benzene to afford yellow crystals as mentioned in this paper.
Bimetallic Magnetic Material [Ni(diamine)2]2[Fe(CN)6]X with Two-Dimensional Network Extended by Fe(III)-CN-Ni(II) Linkages
TL;DR: In this paper, a triclinic space group P21/m (no. 11), with a = 10.300(6), b = 20.632(4), c =10.374(1), α = 93.23(1, β = 106.78(2), β = 95.71(4, γ = 86.37(1)°, V = 1045.0(2) A3 for Z = 2.