Crystal structure of tetrakis[μ 2 -2-(dimethylamino)ethanolato-κ 3 N , O : O ]di-μ 3 -hydroxido-dithiocyanato-κ 2 N -dichromium(III)dilead(II) dithiocyanate acetonitrile monosolvate

• Published in: Acta crystallographica. Section E, Crystallographic communications Crystallographic communications, 2016-04, Vol.72 (4), p.489-491
• Main Authors: Rusanova, Julia A., Semenaka, Valentyna V., Omelchenko, Irina V.
• Format: Article
• Language: English
• ISSN: 2056-9890; 2056-9890
• DOI: 10.1107/S2056989016003996

The tetranuclear complex cation of the title compound, [Cr 2 Pb 2 (NCS) 2 (OH) 2 (C 4 H 10 NO) 4 ](SCN) 2 ·CH 3 CN, lies on an inversion centre. The main structural feature of the cation is a distorted seco-norcubane Pb 2 Cr 2 O 6 cage with a central four-membered Cr 2 O 2 ring. The Cr III ion is coordinated in a distorted octahedron, which involves two N atoms of one bidentate ligand and one thiocyanate anion, two μ 2 -O atoms of 2-(dimethylamino)ethanolate ligands and two μ 3 -O atoms of hydroxide ions. The coordination geometry of the Pb II ion is a distorted disphenoid, which involves one N atom, two μ 2 -O atoms and one μ 3 -O atom. In addition, weak Pb...S interactions involving the coordinating and non-coordinating thiocyanate anions are observed. In the crystal, the complex cations are linked through the thiocyanate anions via the Pb...S interactions and O—H...N hydrogen bonds into chains along the c axis. The chains are further linked together via S...S contacts. The contribution of the disordered solvent acetonitrile molecule was removed with the SQUEEZE [Spek (2015). Acta Cryst. C 71 , 9–18] procedure in PLATON . The solvent is included in the reported molecular formula, weight and density.