Ferrocene-Containing Sterically Hindered Phosphonium Salts.

The synthesis and physical properties of the series of the ferrocenyl-containing sterically hindered phosphonium salts based on di(-butyl)ferrocenylphosphine is reported. Analysis of voltamogramms of the obtained compounds revealed some correlations between their structures and electrochemical properties. The elongation of the alkyl chain at the P atom as well as replacement of the Br anion by [BF₄] shifts the ferrocene/ferrocenium transition of the resulting salts into the positive region.

Vibrational spectra and conformational isomerism of calixarene building blocks: 2-benzylphenol.

The conformations and vibrational spectra of 2-benzylphenol have been analysed within the framework of scaled quantum mechanics. It is shown that the solid-state conformation of the 2-benzylphenol molecule corresponds to one of four potential energy minima predicted by non-empirical quantum chemical calculations for the isolated molecule. In the molten state and in diluted CCl4 solutions of the title compound this conformer coexists with another two spectroscopically detected conformations.