Charge delocalization in ruthenium-quinone complexes. Structural characterization of bis(bipyridine)(3,5-di-tert-butylsemiquinonato)ruthenium(II) perchlorate and trans-bis(4-tert-butylpyridine)bis(3,5-di-tert-butylquinone)ruthenium
Two complexes of ruthenium containing 3,5-di-tert-butylquinone ligands have been characterized crystallographically. The perchlorate salt of bis(bipyridine)(3,5-di-tert-butylsemiquinonato)ruthenium(II), (Ru(bpy)2(DBSQ))ClO4, crystallizes in the monoclinic space group P21/c with a = 15.361 (2) A, b = 24.229 (3) A, c = 11.026 (2) A, US = 103.51 (1), and Z = 4. The complex cation is octahedral in structure, with Ru-O and Ru-N lengths that are typical of Ru(II) and Ru(III) complexes. Structural features of the quinone ligand show one C-O length with a value found typically for semiquinones and the second length to be slightly longer. trans-Bis(4-tert-butylpyridine)bis(3,5-di-tert-butylquinone)ruthenium, Ru(4-t-Bupy)2(DBQ)2, crystallizes in the triclinic space group P anti 1 with a = 9.072 (2) A, b = 11.068 (2) A, c = 11.554 (2) A, = 90.25 (2), US = 99.51 (2), el = 95.96 (2), and Z = 1 with crystallographic inversion symmetry imposed on the molecule. Bond lengths to the metal fail to provide information on the charge distribution within the molecule. Quinone C-O lengths are intermediate between catecholate and semiquinonate values, suggesting charge delocalization within the ruthenium-quinone chelate ring.
- Research Organization:
- Univ. of Colorado, Boulder
- OSTI ID:
- 6295001
- Journal Information:
- Inorg. Chem.; (United States), Vol. 26:11
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
BIPYRIDINES
CHARGE DISTRIBUTION
CRYSTAL STRUCTURE
PERCHLORATES
QUINONES
RUTHENIUM COMPLEXES
BOND ANGLE
BOND LENGTHS
EXPERIMENTAL DATA
SPACE GROUPS
AROMATICS
AZINES
CHLORINE COMPOUNDS
COMPLEXES
DATA
DIMENSIONS
HALOGEN COMPOUNDS
HETEROCYCLIC COMPOUNDS
INFORMATION
LENGTH
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
OXYGEN COMPOUNDS
PYRIDINES
TRANSITION ELEMENT COMPLEXES
400201* - Chemical & Physicochemical Properties