Abstract
Addition of carbon tetrachloride or chloroform to acetonitrile solutions of the bis(fulvalene)dicobalt monocation results in the appearance of new absorption features which are attributed to formation of electron donor-acceptor complexes. The association constants of these complexes aer 2.36 /mole fraction (carbon tetrachloride) and 2.74 /mole fraction (chloroform). Excitation in the absorption bands of the donor-acceptor complexes results in oxidation of the monocation to the dication with high quantum yields. A donor-acceptor complex is also formed when sodium tetraphenylborate is added to acetonitrile solutions of the bis(fulvalene)dicobalt dication. Spectroscopic determination of the association constant of the dication with tetraphenylborate yields a value of 26.3 /mole fraction. Excitation of the absorption bands of the ion-pair results in high quantum yields for formation of the bis(fulvalene) dicobalt monocation. Biphenyl is found in photolyzed solutions as a byproduct of the oxidation of the tetraphenylborate anion.
| Original language | English |
|---|---|
| Pages (from-to) | 273-292 |
| Number of pages | 20 |
| Journal | Coordination Chemistry Reviews |
| Volume | 64 |
| Issue number | C |
| DOIs | |
| Publication status | Published - 1985 |
ASJC Scopus subject areas
- Physical and Theoretical Chemistry