Synthesis and Crystal Structure of Mixed-valence Hexanuclear Manganase Oxide Complex, Hexakis(mu(2)-pivalato)-tetrakis(mu(3)-pivalato)-mono(pyridine)-tris(pivalic acid)-bis(mu(4)-oxo)dimanganese(III) tetramanganase(II)

SARI M., POYRAZ M., Bueyuekguengoer O.

JOURNAL OF CHEMICAL CRYSTALLOGRAPHY, vol.39, no.8, pp.549-552, 2009 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 39 Issue: 8
  • Publication Date: 2009
  • Doi Number: 10.1007/s10870-009-9527-y
  • Journal Name: JOURNAL OF CHEMICAL CRYSTALLOGRAPHY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.549-552
  • Keywords: Mixed-valence, Hexanuclear structure, Clusters, Crystal structure
  • Ondokuz Mayıs University Affiliated: Yes

Abstract

The complex, [Mn6O2(OOCCMe3)(10)(HOO-CCMe3)(3)(py)], has a hexanuclear structure with a Mn6O2 core. This complex crystallizes in the monoclinic space group P2(1)/n with a = 17.757(5) angstrom, b = 27.413(5) angstrom, c = 22.348(5) angstrom, beta = 90.233(5)degrees, V = 9,040(4) angstrom(3) and Z = 4. It contains a [Mn6O2](10+) core that can be described as two edge-sharing Mn-4 tetrahedra at the centre of each of which tetrahedron lies a mu(4)-O2- ion. All Mn atoms are six-coordinate and possess distorted octahedral geometry. Mn-4 exhibits butterfly arrangement with both mu(4)-O atoms on the same side of the molecule. The complex is mixed-valence ((Mn4Mn2III)-Mn-II), and the Mn-III centers are assigned as the two central metal ions bridged by two O2- ions.