Abstract
N,N′-Bis[2-(hydroxyiminomethyl)phenyl]oxamide (H4L) provided trinuclear CuIIMIICuII complexes [M{Cu(HL)-(DMF)}2(DMF)2] (MII = Mn 1, Co 2, Ni 3 or Zn 4). The crystal structures of 1-4 have been determined by X-ray crystallography. They are isomorphous and have an oxamidate-bridged trinuclear CuIIMIICuII structure. The CuII resides in a pseudo-macrocyclic framework of (HL)3- comprised of an oxamidate and a hydrogen-bonded dioximate (=N-O⋯H⋯O-N=) groups to form a square-pyramidal structure {Cu(HL)(DMF)} together with a DMF molecule. Two {Cu(HL)(DMF)} entities co-ordinate to a MnII through the oxamidate oxygens to afford a cis octahedral environment about the metal together with two DMF oxygens. The CuII⋯MII intermetallic distance separated by the oxamidate bridge is 5.33-5.49 Å. In the case of 1 and 3 a significant antiferromagnetic interaction operates between the adjacent CuII and MII. The reaction of 1 with MnII in acetonitrile in the presence of KOH and 18-crown-6 formed Mn{Cu(L)}(H2O)4 that has a polymeric structure extended by the dioximate-MnII-dioximate linkage. It is a weak ferromagnet (TC = 5.5 K) exhibiting a weak antiferromagnetic interaction between the ferrimagnetic chains.
| Original language | English |
|---|---|
| Pages (from-to) | 64-70 |
| Number of pages | 7 |
| Journal | Journal of the Chemical Society, Dalton Transactions |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - Dec 1 2001 |
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All Science Journal Classification (ASJC) codes
- Chemistry(all)
Cite this
Trinuclear CuIIMIICuII complexes of an oxamide/dioxime ligand and extension to a bimetallic magnetic compound. / Fukita, Nobuo; Ohba, Masaaki; Shiga, Takuya; Okawa, Hisashi; Ajiro, Yoshitami.
In: Journal of the Chemical Society, Dalton Transactions, No. 1, 01.12.2001, p. 64-70.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Trinuclear CuIIMIICuII complexes of an oxamide/dioxime ligand and extension to a bimetallic magnetic compound
AU - Fukita, Nobuo
AU - Ohba, Masaaki
AU - Shiga, Takuya
AU - Okawa, Hisashi
AU - Ajiro, Yoshitami
PY - 2001/12/1
Y1 - 2001/12/1
N2 - N,N′-Bis[2-(hydroxyiminomethyl)phenyl]oxamide (H4L) provided trinuclear CuIIMIICuII complexes [M{Cu(HL)-(DMF)}2(DMF)2] (MII = Mn 1, Co 2, Ni 3 or Zn 4). The crystal structures of 1-4 have been determined by X-ray crystallography. They are isomorphous and have an oxamidate-bridged trinuclear CuIIMIICuII structure. The CuII resides in a pseudo-macrocyclic framework of (HL)3- comprised of an oxamidate and a hydrogen-bonded dioximate (=N-O⋯H⋯O-N=) groups to form a square-pyramidal structure {Cu(HL)(DMF)} together with a DMF molecule. Two {Cu(HL)(DMF)} entities co-ordinate to a MnII through the oxamidate oxygens to afford a cis octahedral environment about the metal together with two DMF oxygens. The CuII⋯MII intermetallic distance separated by the oxamidate bridge is 5.33-5.49 Å. In the case of 1 and 3 a significant antiferromagnetic interaction operates between the adjacent CuII and MII. The reaction of 1 with MnII in acetonitrile in the presence of KOH and 18-crown-6 formed Mn{Cu(L)}(H2O)4 that has a polymeric structure extended by the dioximate-MnII-dioximate linkage. It is a weak ferromagnet (TC = 5.5 K) exhibiting a weak antiferromagnetic interaction between the ferrimagnetic chains.
AB - N,N′-Bis[2-(hydroxyiminomethyl)phenyl]oxamide (H4L) provided trinuclear CuIIMIICuII complexes [M{Cu(HL)-(DMF)}2(DMF)2] (MII = Mn 1, Co 2, Ni 3 or Zn 4). The crystal structures of 1-4 have been determined by X-ray crystallography. They are isomorphous and have an oxamidate-bridged trinuclear CuIIMIICuII structure. The CuII resides in a pseudo-macrocyclic framework of (HL)3- comprised of an oxamidate and a hydrogen-bonded dioximate (=N-O⋯H⋯O-N=) groups to form a square-pyramidal structure {Cu(HL)(DMF)} together with a DMF molecule. Two {Cu(HL)(DMF)} entities co-ordinate to a MnII through the oxamidate oxygens to afford a cis octahedral environment about the metal together with two DMF oxygens. The CuII⋯MII intermetallic distance separated by the oxamidate bridge is 5.33-5.49 Å. In the case of 1 and 3 a significant antiferromagnetic interaction operates between the adjacent CuII and MII. The reaction of 1 with MnII in acetonitrile in the presence of KOH and 18-crown-6 formed Mn{Cu(L)}(H2O)4 that has a polymeric structure extended by the dioximate-MnII-dioximate linkage. It is a weak ferromagnet (TC = 5.5 K) exhibiting a weak antiferromagnetic interaction between the ferrimagnetic chains.
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U2 - 10.1039/b006613n
DO - 10.1039/b006613n
M3 - Article
SP - 64
EP - 70
JO - Dalton Transactions
JF - Dalton Transactions
SN - 1470-479X
IS - 1
ER -