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- W2000957490 abstract "A phenol-based macrocyclic compartmental ligand (L)2−, having an N(amine)2O2 metal-binding site with 1,3-trimethylene chain between the two aminic nitrogen atoms and an N(imine)2O2 site with 1,8-naphthalene chain between the two iminic nitrogen atoms, has afforded the following heterodinuclear MIICuII complexes, [MCu(L)(dmf)2](ClO4)2 (M=Mn (1), Co (2), Ni (3), Zn (4)). X-ray crystallographic studies for 1–4 demonstrate that the MII resides in the N(amine)2O2 site and the CuII in the N(imine)2O2 site of the constrained macrocyclic ligand. The MII has a six-coordinate geometry together with two dmf molecules at the axial site and the CuII has a square-pyramidal geometry with a perchlorate oxygen atom at the apical site. Magnetic, visible spectral and electrochemical properties of the complexes are examined. A frozen dmf solution of 1 at liquid nitrogen temperature shows an EPR signal with a Mn hyperfine structure (AMn=103×10−4 cm−1) at ∼2400 Ga, which is attributed to the ST=2 ground state of the spin-coupled MnII (S=5/2)–CuII (S=1/2). A qualitative analysis is made for the EPR of 1 in comparison with the EPR of the ST=1/2 state of spin-coupled NiII (S=1)–CuII (S=1/2) of 3." @default.
- W2000957490 created "2016-06-24" @default.
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- W2000957490 date "2002-09-01" @default.
- W2000957490 modified "2023-10-12" @default.
- W2000957490 title "Heterodinuclear MIICuII complexes of a constrained macrocyclic compartmental ligand. EPR studies of spin-coupled MnIICuII (ST=2) and NiIICuII (ST=1/2)" @default.
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- W2000957490 doi "https://doi.org/10.1016/s0020-1693(02)01099-x" @default.
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