Rhodium I and Gold III Complexes

Reactions of a number of j8-diketonate complexes with phen, shown in equation (13), have been followed at high pressures. The negative values found 

Some gold(III) nucleobase complexes have been observed by VTNMR spectroscopy to undergo rapid site exchange in the presence of free nucleobases (nuc). The negative entropy of activation suggests the operation of an associative process such as reaction (14). Rate constants and activation parameters have also been 

The literature available from the end of the last report (December 1986) to June 1988 is covered in this review. There is also a change in emphasis, in that only oxidation states Cr(II)- Cr(VI) will be discussed in this chapter, with data for lower oxidation states of chromium being covered in other sections of this volume. 

Casabo, X. Solans, and M. Font Altaba, Polyhedron, 6, 1239 (1987). 

---

This simple rule is broadly applicable to the chemistry of palladium(II) and platinum(II) and also to isomerization reactions of square-planar iridium(I), rhodium(I) and gold(III) complexes. However, there are exceptions. In complexes of the type [MX2L2] (M = Pd, Pt X = halide L = phosphine, thioether) the favored direction of isomerization is highly dependent upon the nature of the phosphine or thioether. The favored direction of isomerization reactions in solution is, of course, dependent upon solvent polarity in cases where a pair of isomers exhibit different dipole moments. 

---