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
Structure, optical and magnetic behaviour of meso-tetraphenylporphyrinatoiron(III) tetracyanoethenide, [FeIII(TPP)]+[TCNE]˙−
Shinji Mikami,Ken-ichi Sugiura,Tatsuo Maruta,Yonezo Maeda,Masaaki Ohba,Naoki Usuki,Hisashi Okawa,Tomoyuki Akutagawa,Sadafumi Nisihara,Takayoshi Nakamura,Kentaro Iwasaki,Nobuyuki Miyazaki,Shojun Hino,Eiji Asato,Joel S. Miller,Yoshiteru Sakata +15 more
TL;DR: The electron transfer salt (ETS) [FeIII(TPP)][TCNE] as mentioned in this paper has an extended one-dimensional linear chain with coordination polymer motif comprised of [FeII(TPP)]+ and bridging μ-[TCNE]-˙− with Fe-NTCNE distance 1.889(2) A. 57Fe Mossbauer data.
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Synthesis and property of nitrosyl cobalt and nitrosyl iron complexes with some quadridentate ligands
TL;DR: In this paper, a spin equilibrium between the s = 3 2 and s = 1 2 states of the Jager-type ligands with bridging group R (en = ethylene; pn = 1,2-propylene; ph = ophenylene; mph = 4-methyl- o -phenylene) was revealed.
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Enantioselective reduction of ketones on sterically-controlled lanthanoid(III) complexes
Hisashi Okawa,Tsutomu Katsuki,Michio Nakamura,Naohisa Kumagai,Yuko Shuin,Teruo Shinmyozu,Sigeo Kida +6 more
TL;DR: Sterically controlled lanthanoid complexes, such as as discussed by the authors, functioned as Lewis acid catalysts for enantioselective reduction of ketones (acetophenone, octan-2-one, butan 2-one) with NaBH4 in cyclohexane.
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Dioxygen Oxidation of Coordinated Nitrosyl to Nitro on Dmf-Bridged Dinuclear CoPb Complex
Hideki Furutachi,Hisashi Okawa +1 more
TL;DR: In this paper, the CoIIPbII complex [CoPb(L)(CH3OH)(ClO4)2] reacts with nitrogen monoxide to give the nitrosyl complex, where H2L is a dinucleating macrocycle derived from the [2 : 1 : 1] condensation of 2,6-diformyl-4-methylphenol, ethylenediamine, and diethylenetriamine and has a "salen"- and a "saldien"-like metal-binding site sharing the
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Template Synthesis of a Macrocyclic Tetracopper(II) Complex with Two Bridging Hydroxide Ions in Face-to-face Manner
TL;DR: The reaction of 2,6-diformyl-4-methylphenol, triethylenetetramine, and copper(II) perchlorate hexahydrate in the 2:2:4 molar ratio formed a macrocyclic tetracopper (II) complex.
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