6- -2,2 -bipyridine platinum complexes

Despite the interest in B(C6Fs)3 as a Lewis acid catalyst for organic reactions or a co-catalyst for olefinic polymerizations, little is known of its reaction with water. There is a report of the compound [NHEt3][HOB(C6F5)3] [158] and of the platinum complex, [Pt[HOB(C6Fs)3 Me(Bu2bpy)](Bu2bpy = 4,4 -di-ferf-butyl-2,2 -bipyridine),... 

Dendrimers containing a- and metal-bipyridine-bonded platinum and palladium complexes have been prepared.323-327 Puddephatt and co-workers have generated dendrimers containing both palladium and platinum complexes coordinated to bidentate ligands, 276.325 Dendrimer 276 was synthesized via oxidative-addition of a C—Br bond to a platinum complex to form the dendrimer core. Subsequent reaction with metal complexes gave homo- or heterometallic materials. 

NjCjH, lH-Pyrazole, 3,5-dimethyl-, boron-copper complex, 21 109 N2C8H20, 1,2-Ethanediamine, A,/V -bis(l-meth-ylethyl)-, platinum complex, 21 87 N2C10HS, 2,2 -Bipyridine, ruthenium complex, 21 127... 

N2C10H, 2,2 -Bipyridine, palladium complex, 22 170 mthenium complex, 21 127 NjCioH, 2,2 -Bipyridine, chromium complexes, 23 180 NiC,oH24, 1,2-Ethanediamine, Al,Al -dimethyl-N,N -bis( 1 -methylethyl), platinum complex, 21 88... 

A platinum complex with a bipyridine as the most widely used ligand is easily prepared in high yields by reaction with Pt(Me)2(DMSO)2 in toluene to give an air- and moisture-stable product. The ligand exchange reactions proceed easily with other ligands such as phosphine, CO, and pyridine derivative, as shown in Eq. (7.8) [48]. 

Platinum (260-262) and palladium (262,263) complexes have been incorporated into dendrimeric materials. Polymers incorporating both platinum and palladium units coordinated to bipyridine ligands have been reported by Pudde-phatt and co-workers (114) (262). These dendrimers were prepared via oxidative addition of a C—Br bond to a platinum complex, giving the core molecule. Further reaction with platinum or palladium complexes resulted in the homo- or heterometallic materials, respectively. 

The intercalation of platinum complexes containing bidentate or tridentate aromatic amines was first proposed for binding to tRNA and then to DNA [53]. The structures of the relevant complexes of palladium and platinum are shown in Figure 1.5 and a requisite is the presence of planar ligands such as bipyridine, terpyridine, or o-phenanthroline, which are coplanar with the coordination plane formed by the four ligand donor atoms and the metal ion. The similar pyridine derivative, [Pt(en)py2], where the pyridine Ugands are forced by nonbonded steric constraints to be out of the coordination plane, does not intercalate. 

In 1986, Breikss and Abruna reported electrochemical and mechanistic studies on a close analogue of the rhenium complex, (Dmbpy)Re[CO]3Cl, where Dmbpy = 4,4 dimethyl 2,2 bipyridine. The cyclic voltammogram of the complex at platinum in CH3CN/tetrabutylammonium perchlorate is shown in Figure 3.56 for simplicity we will consider only the electrochemistry taking place above c. —2.3V vs. SCE. 

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