A tetranuclear copper(II) cluster: bis(μ-4-chlorobenzoato-κ²O:O′)(4-chlorobenzoato-κ²O,O′)(4-chlorobenzoato-κO)tetrakis(μ₃-2-pyridylmethanolato-κ⁴N,O:O:O)tetracopper(II)

Abstract

The title compound, [Cu(4)(C(7)H(4)ClO(2))(4)(C(6)H(6)NO)(4)], consists of isolated tetranuclear clusters, where the Cu(2+) cations are five- and sixfold coordinated by O atoms from the 4-chlorobenzoate anions and by pyridine N and methanolate O atoms from bidentate 2-pyridylmethanolate ligands. While three Cu atoms are six-coordinated by an NO(5) donor set forming distorted octahedra, the fourth Cu atom is five-coordinated by an NO(4) donor set forming a distorted tetragonal-pyramidal coordination around the Cu atom. The nucleus is a deformed cubane-like Cu(4)O(4) structure, with Cu···Cu distances in the range 3.0266 (11)-3.5144 (13) Å.

Magneto-structural correlations in a family of di-alkoxo bridged chromium dimers

“…Both hmpH and hepH (Fig. 2) have found widespread use in the coordination chemistry of an array of 3d metals, including Mn, 57,58 Fe, 59 Ni, 60 Co, 61 Cu, 62 Ti, 63 Zn, 64 and V, 65 but as yet nothing has been reported with Cr(III). Our primary interest was therefore to examine simple reactions between pyridine alcohol ligands and Cr(III) salts in the absence of any other chelating or bridging ligands.…”

Reactivity of homoleptic and heteroleptic core paddle wheel Cu(II) compounds

“…The asymmetric furthest oxygen atoms [40][41][42][43][44], which are typically generated in chelate carboxylates due to the Jahn-Teller effect [45] occupy the axial sites. In addition, this six coordinate array is underpinned by the elongation of the CeO carboxylic bond length (C1A-O2A 1.247 Å, C1B-O2B 1.248 Å) respect to the CeO bond of the uncoordinated piperonylic acid (1.214-1.223 Å), clearly suggesting that this oxygen is coordinated [44].…”