A tetranuclear mu(3)-alkoxo-bridged cubane-like copper(II) complex containing 2-(ethylamino)ethanol and acetate: Synthesis and structural characterization

YILMAZ V. T., Kars V., Kazak C.

ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE, vol.633, no.2, pp.351-353, 2007 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 633 Issue: 2
  • Publication Date: 2007
  • Doi Number: 10.1002/zaac.200600300
  • Journal Name: ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.351-353
  • Keywords: copper, tetranuclear copper complex, alkoxo bridge, 2-(ethylamino)ethanol, MAGNETIC CHARACTERIZATION, DICUBANE TYPE, LIGANDS, CLUSTER, SALTS, BASE
  • Ondokuz Mayıs University Affiliated: Yes

Abstract

A tetranuclear cubane-like complex, [Cu-4(mu-Etae)(4)(OAC)(4)](H2O)-H-. (1), with 2-(ethylamino)ethanol (EtaeH) and acetate (OAc)(-) ligands has been synthesized and characterized by elemental analysis, IR spectroscopy, and single crystal X-ray diffraction. Complex 1 crystallizes in the orthorhombic space group Pccn and consists of a tetranuclear [Cu4O4](4+) cubane core in which four copper(II) ions are bridged by mu(3)-alkoxide oxygen atoms of the Etae(-) anion. The amine N atom of Etae(-), and one of the O atom OAc also coordinate to the copper(II) ions forming a distorted square-pyramidal geometry with a CuO4N chromophore. The (CuCu)-Cu-... separations with in the [Cu4O4]4(+) cubanerange from 2.905(2) to 3.377(2) angstrom, and these short Cu-Cu separations are responsible for the anti-ferromagnetic coupling between the copper centers. The cubane-like units are linked by N-(HO)-O-... hydrogen bonds into one-dimensional supramolecular chains, which are further arranged in a two-dimensional array by van der Waal's interactions.