Silver triazenide complexes

Studies of electronic spectra are confined almost exclusively to derivatives of silver(I) (236, 237) and mercury(II) (79, 194, 234), both of which have been investigated extensively. Data have also been recorded for copper(II) triazenide complexes (79, 236) and nickel(II) (84). 

High yields of the moisture-sensitive tris(chelates) Fe(ArNNNAr)3 have been obtained by shaking anhydrous iron(III) chloride with silver(I) triazen-ides in dry ether at room temperature (18). Silver triazenides also react with the iron complexes FeX(CsH5)L2 [L = PPhj, P(OMe)j, P(OPh>3, or CO] via unstable binuclear species (C5H5)LFe(ArNNNAr)AgX to give the chelate triazenide complexes Fe(ArNNNAr)(C5H5)L (13). The complexes... 

The ability of copper(I) and silver(I) salts to react with triazenes was first noted by Peter Griess in 1866 (90), and triazenide complexes of these metals have attracted considerable attention during the intervening years. In marked contrast the first gold triazenide complexes have only recently been reported. 

Finally, copper(I), silver(I), and mercury(II) triazenides react with selected rhodium(I), iridium(l), and platinum(II) halide complexes to afford metal-metal bonded binuclear triazenide-bridged species 129). 

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