2-Phenyl-6- pyridine, reaction with platinum

Conversion of norbornadiene to nortricyclenes can also be achieved with organomercurials. This reaction proceeds via transmetalation to form a c-bonded organopalladium system which inserts norbornadiene. Thus an enrfo-cw-addition is observed. Conversions of this type were observed in the phenylation of dichloro(t -norbornadiene)palladium either with diphenyl-mercury or, more conveniently, with sodium tetraphenylborate to give di-/r-chlorobis(2 5,6-t -c ffo-3-phenylbicyclo[2.2.1]hept-e /o-2-yl)palladium (30) via cis addition.By contrast, the analogous platinum complex did not give a phenylation product. The palladium complex 30 underwent reversible ring closure to a nortricyclenyl complex 31 with pyridine. ... 

A series of iridium(III) complexes of the type Ir(L-L)3 have been prepared by reaction of a glycerol solution of Ir(acac)3 and L-L (2-arylpyridine or 2-aryl-l-qui-noline) in an open vessel equipped with a reflux condenser. 5 This represented an improvement on the analogous methodology using a domestic microwave oven as less ligand was required, but YIFs were only 0.82-1.2. In the case of 2-phenyl-l-quin-oline, a 10% yield of the Ir complex was obtained in 20 min, while only trace amounts were produced after 10 h of conventional reflux. Cyclometallated platinum(II) complexes of the type PtCl(L-L)L where L-L = 2-phenylpyridine, 2-(2 -thienyl)pyridine, or benzoquinoline have also been prepared but not with any enhancement in yield (YIF = 0.58-1.0). 55... 

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