And ligands bridging

Cu(4,4 -bipy)Br2 298 1.85 Farad probably octahedral, polymeric structure involving halide and ligand bridging 69F3... 

Many complexes have more than one coordination mode of BH4 featured in their structure, e.g. [U ()9 -BH4)()9 -BH4)2(dmpe)2]. Likewise, whereas [M(BH4)4] are monomeric 12-coordinate complexes for M = Zr, Hf, Np, Pu, they are polymeric for M = Th, Pa, U the coordination number rises to 14 and each metal centre is coordinated by two r) -BH4 and four bridging r) -BH4 groups. It is clear that among the factors which determine the mode adopted are the size of the metal atom and the steric requirements of the co-ligands. Many of the complexes... 

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... 

Finally, we consider the alternative mechanism for electron transfer reactions -the inner-sphere process in which a bridge is formed between the two metal centers. The J-electron configurations of the metal ions involved have a number of profound consequences for this reaction, both for the mechanism itself and for our investigation of the reaction. The key step involves the formation of a complex in which a ligand bridges the two metal centers involved in the redox process. For this to be a low energy process, at least one of the metal centers must be labile. 

Other ligands that react to form these Hg(I) complexes are 1,2- and 1,4-diaminoben-zene, 1,10-phenanthroline , and the bridged ring compound ... 

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