Olefin Complexes of Silver(I) and Copper(I) #beta#-Diketonates

摘要

Reactions of silver(I) and copper(I) 1,1,1,5,5,5-hexafluoroacetylacetonate (hfacac) with dienes 1,2, and 3 resulted in some stable complexes. All of them showed an equal molar ratio of hfacac to diene per coordinated metal ion. The structure of Ag(hfacac)(1)(THF) 6 was solved by X-ray diffraction analysis. The complex crystallized in the monoclinic space group P2_1 with a = 6.342(3), b = 32.89(7), c = 11.680(2) A, and z = 4. It was mononuclear with inclusion of a solvent molecule. Since the C_2v symmetry of 3 retained upon forming both silver(I) and Cu(I) complexes, a fast equilibrium of dissociation/recombination must have happened in the soltions. The changes of ~1H and ~13C NMR chemical shifts caused by coordination were measured.