Hexanuclear copper(II) complex of 2-hy­droxy-N,N′-bis­[1-(2-hy­droxy­phen­yl)ethyl­idene]propane-1,3-di­amine incorporating an open-cubane core

ABSTRACT: In the title Schiff base hexa­nuclear copper(II) complex, two discrete environments are present in the structure: CuNO4 and CuNO3. Four copper(II) cations are situated in a distorted square-pyramidal environment, while two copper(II) cations are located in a slightly square-planar geometry. Three of the copper(II) cations occupy three vertices of an open cubane Cu3O4. The title mol­ecular structure, namely, di­aqua­tris­(μ3-1,3-bis­{[1-(2-oxidophen­yl)ethyl­idene]amino}­propan-2-olato)-μ3-hydroxido-dinitrato­hexa­copper(II) ethanol tris­olvate, [Cu6(C19H19N2O3)3(NO3)2(OH)(H2O)2]·3C2H5OH, corres­ponds to a non-symmetric hexa­nuclear copper complex. The complex exhibits one core in which three CuII metal centres are mutually inter­connected, two by two, via three phenolato oxygen anions acting in a μ2-mode. These three copper cations are inter­connected in a μ3-mode by one hydroxyl group. An open-cube structure is generated in which each of the CuII cations of the three CuO4N units is connected by two μ2-O anions from phenolate groups and one μ3-O atom from a hy­droxy anion. Each of the three penta­coordinated CuII cations situated in the open-cube unit has a distorted NO4 square-pyramidal environment. Each of these three CuII centres is inter­connected with another CuII cation via one enolate O atom in μ2-mode, yielding one CuNO4 unit and two CuNO3 units. The penta­coordinated CuII atom has a distorted square-pyramidal environment while the two tetra­coordinated copper(II) cations are situated in a square-planar environment. A series of intra­molecular O—H⋯O hydrogen bonds are observed. In the crystal, the units are connected two by two by inter­molecular C—H⋯O and O—H⋯O hydrogen bonds, thus forming sheets parallel to the ac plane.

SUBMITTER: Kebe M 

PROVIDER: S-EPMC8382066 | biostudies-literature |

REPOSITORIES: biostudies-literature