Cyclometalating terdentate

The terdentate cyclometalated complexes [Ir(L)(L )]2+ and [Ir(L )2]1, L = 2,6-bis(7 -methyl-4 -phenyl-2 -quinoyl)pyridine (233), L = monoanion of L (234), luminesce at 77 K in MeOH/EtOH (lmax = 592 nm, r =20 ps) and at room temperature in deoxygenated acetonitrile (imax 620 nm, r = 325 ns).405 Both compounds undergo four reversible, ligand-centered, one-electron reduction processes. 

Fig. 18 Schematic structures of cyclometalated bis-terdentate complexes the two terdentate planar systems are roughly perpendicular to each other...

Table 12 Photophysical properties of selected Ir(III) complexes of terdentate cyclometalating ligands3... 

A dimethylplatinum(ii) complex having monoimine of ethylenediamine with 9-phenanthraldehyde undergoes oxidative addition of Mel to afford dimethyl(iodo)platinum(iv) complex with terdentate C,jV,A-ligand. Complex 1029 with a six-membered cyclometallated imine ring and its isomer with a five-membered ring are obtained as a mixture (Equation (190)). ... 

The rates of chloride dissociation for triphenylphosphine substitution have been measured for a series of cyclometalated [Pt(N-N-C)Cl] complexes containing terdentate N-N-C anionic ligands derived from deprotonated alkyl-, phenyl-and benzyl-6-substituted 2,2 -bipyridines. The main factor controlling the rate is... 

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