Ferrocene containing cryptands

Fig. 6-2. Schematic representation of a ferrocene-containing macrocycle in which the ferrocene moiety is attached to a cryptand, spherand or cavitand. Fc = 1-substituted or 1,1 -disubstituted ferrocene jc = O, S, or NR m,n,p = 1,2, or 3 y = number of ferrocene units attached, usually 1 to 4.

Some spectroscopic studies on metallocenes are as follows Gas phase syndiesis of unsymmetrically substituted ruthenocenes have been prqiared by gas phase electrocyclic reactions of pentadieny] ruthenium complexes. In the continuing soies of ptqiers on the Mdssbauer spectra of ferrocenes, azaferrocenes and phosphaferrocenes have been examined. H NMR studies have been carried out on the compounds of iod(4)iruthenoceniums(II,IV). A series of multinuclear NMR and X-ray single crystal diffraction shidies of metallocene containing cryptands has been carried out in addition to coordination studies of these species. ... 

The cryptand (33) containing three ferrocene redox centers (78) has been prepared by our group via the synthetic pathway shown in Scheme 13. Although electrochemically insensitive to Group IA metal cations, this cryptand does electrochemically recognize Zn2+ and forms an isola-ble 2Zn2t (33) bimetallic complex. 

In general, there are two types of macrocycles or cryptands containing the ferrocene unit. The first is that in which the ferrocene is appended to either a macrocycle — represented schematically by Fig. 6-1, or to a cryptand, spherand or cavitand (Fig. 6-2). The second class of compounds has ferrocene incorporated... 

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