Chelates s. Complex salts

Characterization of compounds s. subentry derivatives Chelates s. Complex salts, inner... 

Characterization of compounds s. subentry derivatives Chelates s. Complex salts, inner Chloranil as reagent 16, 524 Chlorides s. a. Halides, Replacement... 

Although the [Zn(bpy)3] + ion is labile, a number of optical studies have been made (91). The phenomenon in which the optical activity of a labile tris (chelate) complex is enhanced in the presence of a chiral environment compound is known as the Pfeiffer effect (298, 449) and was first observed in complexes of 1,10-phenanthroline and 2,2 -bipyri-dine. A number of examples involving [Zn(bpy)s]2+ salts are known (298, 478, 636). 

Compounds containing M-tj--alkene bonds are generally prepared by direct replacement of a less strongly bound ligand such a.s a halide ion (cf. Zeise s salt), a carbonyl, or another alkene. Chelating dialkene complexes can be made similarly, e.g. with m-cff-cycloocta-i.S-diene (cod) ... 

Scherg, T., Schneider, S.K., Frey, G.D. et al. (2006) Bridged imidazolium salts used as precursors for chelating carbene complexes of palladium in the Mizoroki-Heck reaction. Synlett, 2894-907. 

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