TY - JOUR
T1 - Syntheses, structures, and magnetic properties of cubane-based cobalt and nickel complexes with ONO-tridentate ligands
AU - Yoshitake, Megumi
AU - Nishihashi, Momoko
AU - Ogata, Yasumasa
AU - Yoneda, Ko
AU - Yamada, Yasunori
AU - Sakiyama, Hiroshi
AU - Mishima, Akio
AU - Ohba, Masaaki
AU - Koikawa, Masayuki
N1 - Funding Information:
This work was supported by JSPS KAKENHI Grant Number JP23550080 and JP26410075 from Japan Society for the Promotion of Science (JSPS).
Publisher Copyright:
© 2017 Elsevier Ltd
PY - 2017/11/4
Y1 - 2017/11/4
N2 - Three types of cubane-based complexes, [Co4(L1-H)4Cl2(MeOH)2] (1) [H2L1-H = N-(2-hydroxymethylphenyl)salicylideneimine], [Ni4(L1-Bz)4(EtOH)4] (2) [H2L1-Bz = N-(2-hydroxymethylphenyl)-5,6-benzosalicylideneimine], and [Co2Ni(L1-H)2(HL1-H)(CH3COO)2] (3), have been characterized by X-ray crystal structure analyses and magnetic measurements. Homo-metal complexes 1 and 2 are tetranuclear complexes. Complex 1 has a defective double-cubane metal core. The valence state of cobalt ions is assigned to mixed valence Co(II)2Co(III)2. On the contrary, 2 takes a simple cubane core comprised of four [Ni(II)(L1-Bz)] monomer units. Complex 3 has a novel hetero-metal and mixed-valence trinuclear metal core structure. Cryomagnetic studies for 1–3 indicate that ferromagnetic interactions are dominate due to the cubane-based metal core structures.
AB - Three types of cubane-based complexes, [Co4(L1-H)4Cl2(MeOH)2] (1) [H2L1-H = N-(2-hydroxymethylphenyl)salicylideneimine], [Ni4(L1-Bz)4(EtOH)4] (2) [H2L1-Bz = N-(2-hydroxymethylphenyl)-5,6-benzosalicylideneimine], and [Co2Ni(L1-H)2(HL1-H)(CH3COO)2] (3), have been characterized by X-ray crystal structure analyses and magnetic measurements. Homo-metal complexes 1 and 2 are tetranuclear complexes. Complex 1 has a defective double-cubane metal core. The valence state of cobalt ions is assigned to mixed valence Co(II)2Co(III)2. On the contrary, 2 takes a simple cubane core comprised of four [Ni(II)(L1-Bz)] monomer units. Complex 3 has a novel hetero-metal and mixed-valence trinuclear metal core structure. Cryomagnetic studies for 1–3 indicate that ferromagnetic interactions are dominate due to the cubane-based metal core structures.
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U2 - 10.1016/j.poly.2017.03.043
DO - 10.1016/j.poly.2017.03.043
M3 - Article
AN - SCOPUS:85017408400
SN - 0277-5387
VL - 136
SP - 136
EP - 142
JO - Polyhedron
JF - Polyhedron
ER -