A bis 1,10-phenanthroline ligand leading to octahedral Ru(II) complexes containing a well-defined axis

摘要

A bis-chelating ligand (1), made of two 1,10-phenanthroline subunits connected with a p-(CH_2)_2C_6H_4(CH_2)_2-spacer through their 4 positions, has been prepared, using Skraup syntheses and reaction of the anion of 4-methyl-7-anisyl-1,10-phenanthroline with #alpha#,#alpha#-dibromo-p-xylene. Complexation of 1 with Ru(CH_3CN)_4Cl_2 and subsequent reaction with 4,4'-dimethyl-2,2'-bipyridine afforded an octahedral Ru(II)tris-diimine complex, in which a well-defined axis running through the terminal anisyl substituents and the central metal has been created, as shown by an X-ray molecular structure analysis.