Cation structures trinuclear complexes

Structural studies on the trimer (4) showed that the conformation of the six-membered Pt303 ring is dependent on the counter-ion present with the cation [ 14,15]. On this basis it was suggested that the ring does not have a rigid conformation in solution. No studies with the trinuclear complexes and DNA have been reported. 

The alkynyl ligand of Pt-phosphine complexes serves as the metallaligand that binds Ag(i) or Cu(i), forming di- or trinuclear complexes. Cationic Ag(i) and Gu(i) centers are bonded with two m-dialkylplatinum complexes to yield the trinuclear complexes with 7r-coordination of the four alkynyl ligands to a alkynyl ligands of the complexes with a /r< / i -structure to GuCNOa) forms the PtCu2 complex 709. " ... 

Figure 2.43. Molecular structures of trinuclear complexes built around an octahedral cobalt, iron or zinc cation.

Similar observations were made with bis[alkoxy(alkylamino)carbene]gold complexes, which are prepared by ring opening of trinuclear precursors with trifluoromethanesulfonic (triflic) acid. Through anion metathesis, several crystalline forms were obtained, the structures of which were determined. The triflate salt has a chain of cations in the crystal, while the chloroform solvate of a />-benzoquinolate contains only monomeric cations. In the solvent-free crystals, dimers are present (Scheme 59).251... 

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