A "CO-like matrix", showing coordination analogous to that of carbonyl groups, is provided by silacalix[4]phosphinine macrocycles. Reaction with Au(I) leads to the first gold(I) complexes of macrocycles, which can be reduced with sodium or potassium to the paramagnetic gold(0) complexes (an example is shown), as evidenced by cyclic voltammetry and EPR spectroscopy.
ChemInform Abstract The title compounds (III) are obtained according to the scheme and characterized by spectral (31P, 13C NMR, MS) data, and an X-ray structure analysis of the tetrasulfide (IV) of (IIIb) (space group P1, Z=2). These compounds are of interest as components of organic metals and superconductors.
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