Bidentate bridges

First example of p(/), /) )-C104 as a bidentate bridging ligand (to Ag ) chelating /) -C104 identified in 197 4... 

In Fig. 20 the hydration pattern of N and O-atoms is shown schematically 158). Some of the solvent molecules underly interaction only with one base atom whereas others will bridge two atoms of the nucleotide (bidentate bridging). 

Besides the oxide sulfate described above, (NH4)2[Pt2(S04)4(H20)2] is obtained in the reaction of Pt(N03)2 with concentrated sulfuric acid in sealed glass ampoules at 400 °C.124 In the crystal structure, Pt2 dumbbells are coordinated by four bidentate-bridging sulfate ions and two axial H20 molecules. The... 

The only report of coordination of a dithiazolyl radical to date is the formation of the complex TTTACu(hfac)2.75 In it the TTTA molecules played the role of a bidentate bridging ligand, forming an alternating chain with the Cu(hfac) units. 

Asp-M Monodentate Asp-M Bidentate, chelating Asp-M Bidentate, bridging y-Carboxyglutamate... 

Br) and [PtCl2L]3. The small shift in v(CN) on co-ordination indicates unidentate bonding via P for the monomers. However, the i.r. data suggest that L acts as a bidentate bridge in the trimer, for which the structure (91) was... 

A second example of a bis cyclopentadienyl uranium complex has resulted from the use of a bidentate, bridged bis(cyclopendadienyl) ligand to avoid further reaction to a tris species. It is prepared by the addition of the dianion of bis(cyclo-pentadienyl)methane to uranium tetrachloride in THE to give [CH2( — 5114)2]... 

The diazines also form metal complexes. Thus, pyrazine forms tetrahedral and octahedral complexes with Co11 and other transition metals it functions as a monodentate and also as a bidentate bridging ligand to give polymeric complexes. The stability of these complexes is increased by back-bonding. 

Ni2(OSCPh)4(EtOH) SqPl + SqPy Dinuclear bidentate bridging PhCSO-(233) 201-206 222-223 (S) 250 (Ni) 1737, 1738... 

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