Pradeep, Chullikkattil P. ; Supriya, Sabbani ; Zacharias, Panthapally S. ; Das, Samar K. (2006) A tetra-nuclear copper(II) complex stabilizes an extended structure of a water nonamer: synthesis and characterization of [Cu4(C54H46N4O14)(OH)2] · 10H2O Polyhedron, 25 (18). pp. 3588-3592. ISSN 0277-5387
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Official URL: http://www.sciencedirect.com/science/article/pii/S...
Related URL: http://dx.doi.org/10.1016/j.poly.2006.07.008
Abstract
A tetra-nuclear copper(II) complex [Cu4(C54H46N4O14)(OH)2] · 10H2O (1) has been synthesized starting from l-tyrosine, NaOH, 2,6-diformyl-4-methylphenol (dfp) and CuSO4 · 5H2O. Compound 1 crystallizes from an ethanol-water mixture in triclinic P1̅ space group. In the crystal of 1, two binuclear copper units, related by a center of symmetry, are bridged by two hydroxo bridges and results in the formation of a tetra-nuclear {Cu4} structure. Five lattice water molecules, located in the asymmetric unit, interact among themselves and form an unusual form of a water nonamer. In the crystal, the water nonamer is again hydrogen bonded to the next nonamer forming a chainlike polymer. Each {Cu4} complex unit attaches four such water nonamer chains. Variable temperature magnetic data fit to the Bleaney-Bower's equation with a Curie type of impurity of S = 0.5. The best fit of the magnetic data to this equation yielded 2J = -217, g = 2.019 and a TIP value of 60 × 10-6 cm3 mol-1.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | Schiff-base Ligand; Tetra-nuclear Copper(II) Complex; Crystal Structure; Extended Chainlike Structure of Water Nonamer; Supramolecular Hydrogen Bonding Network; Magnetic Studies |
| ID Code: | 63427 |
| Deposited On: | 29 Sep 2011 04:30 |
| Last Modified: | 29 Sep 2011 04:30 |
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