(4′-Ethynyl-2,2′:6′,2′′-terpyridine)(2,2′:6′,2′′-terpyridine)ruthenium(II) bis(hexafluoridophosphate) acetonitrile disolvate

• Main Authors: Weizhong Chen, Francisca N. Rein, Brian L. Scott, Reginaldo C. Rocha
• Format: Article
• Language: English
• Published: International Union of Crystallography 2013-02-01
• Series: Acta Crystallographica Section E
• Online Access: http://scripts.iucr.org/cgi-bin/paper?S1600536812051227

The title heteroleptic bis-terpyridine complex, [Ru(C15H11N3)(C17H11N3)](PF6)2·2CH3CN, crystallized from an acetonitrile solution as a salt containing two hexafluoridophosphate counter-ions and two acetonitrile solvent molecules. The RuII atom has a distorted octahedral geometry due to the restricted bite angle [157.7 (3)°] of the two mer-arranged N,N′,N′′-tridendate ligands, viz. 2,2′:6′,2′′-terpyridine (tpy) and 4′-ethynyl-2,2′:6′,2′′-terpyridine (tpy′), which are essentially perpendicular to each other, with a dihedral angle of 87.75 (12)° between their terpyridyl planes. The rod-like acetylene group lies in the same plane as its adjacent terpyridyl moiety, with a maximum deviation of only 0.071 (11) Å from coplanarity with the pyridine rings. The mean Ru—N bond length involving the outer N atoms trans to each other is 2.069 (6) Å at tpy and 2.070 (6) Å at tpy′. The Ru—N bond length involving the central N atom is 1.964 (6) Å at tpy and 1.967 (6) Å at tpy′. Two of the three counter anions were refined as half-occupied.