Azides of Palladium

Not much is known about the normal azide Pd(N3)2 except that it is a brown, water-insoluble solid which is very sensitive to heat, friction, and impact [139,158]. It is precipitated when solutions of palladium salts and azide are combined, e.g., 0.1 M sodium azide and 0.01 M palladium perchlorate are mixed in molar ratios, but the precipitate cannot be dried without exploding [166]. This azide is occasionally obtained as an undesired intermediate to the complex paDadium azides. 

Complex palladium azides are obtained by dissolving palladium salts in excess azide, e.g., palladium nitrate and sodium azide (1 4) yield a triazido anion, [Pd (N3)3] [167]. Similarly, a tetraazido anion, [Pd (N3)4] , is obtained from K2 [PdCU] by ligand exchange [162]. Another all-azido anion is the azide-bridged, binuclear complex [Pd2(N3)6] [168]. All of these have been isolated as salts of large organic cations. 

Also known are a variety of mixed azido complexes such as the neutral structure [L2Pd (N3)2] [168,170] and its binuclear variation, [LPd (N3)2]2 [168]. A binuclear cation of the suggested composition (a) [171] and a neutral 

Complexation involves redox reaction sensitive to light h 

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