TY - JOUR
T1 - μ-hydroxo-μ-phenolato dinuclear nickel(II) complexes in a mixed-spin state and their urea adduct as relevance to the urease active site
AU - Amase, Rie
AU - Shiraishi, Hitomi
AU - Miyasato, Yuji
AU - Ohba, Masaaki
AU - Okawa, Hisashi
PY - 2005
Y1 - 2005
N2 - Dinucleating compartmental ligands (2,6-bis{N-[(2-dimethylamino)ethyl] iminomethyl}-4-methylphenol (HL 1) and 2-{N-[(2-dimethylamino)ethyl] iminomethyl}-6-{N-methyl-N-[2-(dimethylamino)ethyl]aminomethyl}-4-methylphenol (HL 2)) have afforded the following dinuclear nickel(II) complexes: [Ni 2(L 1)(OH)(py)(H 2O)](ClO 4) 2·H 2O (1), [Ni 2(L 2)(OH)(MeOH) (H 2O)](ClO 4) 2·CH 3CN (2), and [Ni 2(L 2)(OH)(dmf) 2](ClO 4) 2 (3). X-ray crystallographic studies for 1 and 3 have clarified a μ-hydroxo-μ-phenolato dinuclear structure in a mixed-spin state with one pseudo octahedral Ni(II) (S = 1) and one planar Ni(II) (S = 0). The urea adducts, [Ni 2(L 1)(OH)(urea)(H 2O)](ClO 4) 2·H 2O (1′) and [Ni 2(L 2)(OH)(urea)(H 2O)](ClO 4) 2 (2′), were prepared by the reaction of 1 and 2 with urea, respectively, and were structurally characterized to be in the mixed-spin state. The relevance of 1′ and 2′ to urease is discussed.
AB - Dinucleating compartmental ligands (2,6-bis{N-[(2-dimethylamino)ethyl] iminomethyl}-4-methylphenol (HL 1) and 2-{N-[(2-dimethylamino)ethyl] iminomethyl}-6-{N-methyl-N-[2-(dimethylamino)ethyl]aminomethyl}-4-methylphenol (HL 2)) have afforded the following dinuclear nickel(II) complexes: [Ni 2(L 1)(OH)(py)(H 2O)](ClO 4) 2·H 2O (1), [Ni 2(L 2)(OH)(MeOH) (H 2O)](ClO 4) 2·CH 3CN (2), and [Ni 2(L 2)(OH)(dmf) 2](ClO 4) 2 (3). X-ray crystallographic studies for 1 and 3 have clarified a μ-hydroxo-μ-phenolato dinuclear structure in a mixed-spin state with one pseudo octahedral Ni(II) (S = 1) and one planar Ni(II) (S = 0). The urea adducts, [Ni 2(L 1)(OH)(urea)(H 2O)](ClO 4) 2·H 2O (1′) and [Ni 2(L 2)(OH)(urea)(H 2O)](ClO 4) 2 (2′), were prepared by the reaction of 1 and 2 with urea, respectively, and were structurally characterized to be in the mixed-spin state. The relevance of 1′ and 2′ to urease is discussed.
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U2 - 10.1246/bcsj.78.1814
DO - 10.1246/bcsj.78.1814
M3 - Article
AN - SCOPUS:33750531452
VL - 78
SP - 1814
EP - 1820
JO - Bulletin of the Chemical Society of Japan
JF - Bulletin of the Chemical Society of Japan
SN - 0009-2673
IS - 10
ER -