MOLECULAR STRUCTURE OF PHOSPHAFERROCENE AND CHARGE-DENSITY DISTRIBUTION AT LOW TEMPERATURE
While the chemical reversibility of the oxidations of (TPP)ZnL in EtCl, seen here is interesting, it is a t variance with previously reported work in acetonitrile. I t is surprising that no measurable quantity of the (8-py) derivative is formed and suggests that the solvent system plays an important role in the intermediate stablization of two possible oxidative pathways. Since the isolation of the (p-py) derivative was easily repeated and the [(TPP)ZnL]+ titration showed mixed species spectra, this solvent effect must indeed be operative. It should be noted, however, that even with the 500-ms time scale of our spectral acquisitions we cannot determine the exact nature of the intermediates in these pathways. Spectral changes were instantaneous with ligand addition.