The role of intermolecular interactions in the assemblies of FeII and CoII tetrakis-isothiocyanatometalates with tris(1,10-phenanthroline)-RuII: Crystal structures of two dual-metal assemblies featuring octahedral cationic and tetrahedral anionic modules
Artikel i vetenskaplig tidskrift, 2008

Two new dual-metal assemblies: 2[Ru(phen)3]2+·[Fe(SCN)4]2−·2SCN−·4H2O 1 and [Ru(phen)3]2+·[Co(SCN)4]2− 2, (phen:1,10-phenanthroline), have been prepared and their structures were characterized by X-ray diffraction. In 1, the cationic octahedral enantiomers are arranged with a ΛΔΛΔΛ sequence supported by π–π stacking and the anionic inorganic tetrahedral units are oriented between these stacks by interacting with the nearby water molecules through strong O–H...O and O–H...S hydrogen bonds. In 2, homochiral double helices in the b-direction are revealed, with tetrakis-isothiocyanate CoII anions arranged in the crystal to furnish one-dimensional (1D)-helical chains with S...S intermolecular interactions at 3.512(2) and 3.966(2)Å supporting [Ru(phen)3]2+ Λ- and Δ-helices with Ru...Ru shortest distance of 8.676(7)Å. In both 1 and 2, the supramolecular assembly is maintained by C–H...S hydrogen bonds extending between the phenanthroline aromatic carbons in the cationic nodes and the sulphur atoms of the isothiocyanates anions. Analysis of S...S interactions in isothiocyanate containing compounds using Cambridge structural database (CSD) showed an angle dependence categorizing these interactions into “type-I” and “type-II”.

racemates

double-helices

S...S intermolecular interaction

X-ray single-crystal structure determination

hydrogen bonding

dual-metals

Författare

Mohamed I D M Ghazzali

Chalmers, Kemi- och bioteknik, Fysikalisk kemi

Vratislav Langer

Chalmers, Kemi- och bioteknik, Oorganisk miljökemi

Lars Öhrström

Chalmers, Kemi- och bioteknik, Fysikalisk kemi

Journal of Solid State Chemistry

0022-4596 (ISSN) 1095-726X (eISSN)

Vol. 181 9 2191-2198

Ämneskategorier

Oorganisk kemi

Organisk kemi

DOI

10.1016/j.jssc.2008.04.039