Tetrazolate ligands

The azido complex [(T) -Cp )(N3)Rh( j.-N3),Rh(N3)(Ti -Cp )] with trifluoroace-tonitrile gives the tetrazole complex with two terminal and one bridging tetrazolate ligands as well as one unreacted bridging azido group, 193... 

Tetrazole complexes of Ru have received far less attention than tiiazole or, in general, other heterocyclic ligands. Complex formation of Ru(bpy)2 and Ru(4,4 -Me2bpy)2 groups with the tetrazole ligands (82)-(84) has been studied, and electronic spectroscopic and electrochemical properties reported. ... 

Mono- and binuclear mthenium(ll) polypyridyl complexes containing 5-aryl-177-tetrazole ligands were analogously prepared <2006IC695>. 

The introduction of a tetrazolate ligand on rhenium complexes allows for a tunability of the photophysical properties of these species. The use of a simple protonation-deprotonation protocol enables to reversibly change, light-emission output and performance of a series of Re(i)-aryl tetrazolate-based phosphors. ... 

Reedijk and co-workers have studied the iron(II) spin-state crossover in [Fe(teec)6]X2, where X is BF4, CIO4, or PFg, and teec is the monodentate l-(2-chloroethyl)tetrazole ligand. Depending upon the anion and the rate of precipitation, these complexes exhibit differing, partial or complete, spin-state crossover behavior with gradual or sharp, one- or two-step, transitions both with and without hysteresis. 

The use of a Ru(ll) catalyst containing a proline-derived tetrazole ligand has been reported in a synthetic application the reduction of an iminium cation en route to (5)-(—)-lennoxamine (Fig. 14). The study provided an interesting contrast between the use of the ATH and AH reduction methods, with selection dependent on the metal used [68]. 

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