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Mono- and polynuclear Cu(II) coordination compounds that contain diazine ligands
- Source :
-
Polyhedron . Aug2008, Vol. 27 Issue 12, p2650-2654. 5p. - Publication Year :
- 2008
-
Abstract
- Abstract: Cu(OTf)2(2-mepyz)2(H2O)2 (2-mepyz=2-methylpyrazine; OTf− = =triflate), 1, and Cu(OTf)2(H2O)2(pyz) (pyz=pyrazine), 2, consist of monomeric and polymeric structures, respectively. Both compounds contain octahedral Cu(II) metal centers surrounded by trans-coordinated OTf−, H2O, and diazines, either 2-mepyz in the case of 1 or pyz in 2. In 1, O–H⋯O(triflate) hydrogen bonds link CuO4N2 monomers into quasi-1D chains which are joined via O–H⋯N interactions to afford a three-dimensional (3D) network. Pyz ligands in 2 link CuO4N2 octahedra into linear chains similar to Cu(NO3)2(pyz). Magnetically, neither 1 or 2 show indications for long-range magnetic ordering (LRO) above 2K. Least-squares fits of the magnetic susceptibility data, χ(T), to a Bonner–Fisher uniform chain model gave 2J/k B =−0.005(1) and −6.0(1)K for compounds 1 and 2, respectively, indicative of negligible and moderate antiferromagnetic coupling between spin-1/2 Cu(II) ions. Inter-chain magnetic interactions seem to be negligible for both systems. [Copyright &y& Elsevier]
- Subjects :
- *LIGANDS (Chemistry)
*POLYMERS
*MONOMERS
*COMPLEX compounds
Subjects
Details
- Language :
- English
- ISSN :
- 02775387
- Volume :
- 27
- Issue :
- 12
- Database :
- Academic Search Index
- Journal :
- Polyhedron
- Publication Type :
- Academic Journal
- Accession number :
- 33664510
- Full Text :
- https://doi.org/10.1016/j.poly.2008.05.007