Selective displacement of chloride from
cyclopentadienyl(1,4-dichlorobenzene)iron(1+) by a
series
of cyclic secondary amine nucleophiles is described. This
selectivity, in combination with further
manipulation of the complexes, allows access to a series of
unsymmetrical and/or functionalized
tetraalkyl-p-phenylenediamine complexes. A series of
demetalated phenylenediamines were shown
by CV to have redox potentials distributed over a range of 320 mV, as a
consequence of remote
functionality. Preliminary fluorescence studies on a series of
electron acceptor-substituted
phenylenediamines indicated quenching of the phenylenediamine
fluorescence, attributable to rapid
electron transfer.
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