
TY  - JOUR
A1  - D'Alessandro, Deanna M. 
A1  - Keene, F. Richard 
A1  - Steel, Peter J. 
A1  - Sumby, Christopher J. 
T1  - Ruthenium(<emph type="6">II</emph>) Complexes of Multidentate Ligands Derived from Di(2-pyridyl)methane
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 2003
VL  - 56
IS  - 7
SP  - 657
EP  - 664
KW  - 
UR  - https://doi.org/10.1071/CH03019 
N2  - Bis(2,2&#8242;-bipyridyl)ruthenium complexes of the model ligand di(2-pyridyl)methane (1) and its multidentate derivatives 1,1,2,2-tetra(2-pyridyl)ethane (2), tetra(2-pyridyl)ethene (3), and hexa(2-pyridyl)[3]radialene (4) have been prepared and characterized by NMR, visible absorption spectroscopy, electrochemical measurements, and, in two cases, by X-ray crystallography. Complexes of (2) and (3) exist as conformationally rigid species with lower than expected symmetry. Ligands (2) and (3) proved surprisingly resistant to forming dinuclear ruthenium complexes. The two diastereoisomeric dinuclear complexes of (4), &#916; &#x039B;/&#x039B; &#916; and &#916; &#916;/&#x039B; &#x039B; (rac), are shown to be locked in conformations of C1 and C2 point-group symmetry, respectively. This represents a rare example where the &#916; &#x039B;/&#x039B; &#916;-dinuclear complex of a achiral, symmetrically bridging ligand is not a meso compound. 
ER  -

