Transition metal complexes having 2,2'-bipyridine ligands substituted by at least one ammonium alkyl radical
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United States of America Patent
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Apr 25, 1995
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N/A
app pub date -
Dec 14, 1993
filing date -
Dec 15, 1992
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Abstract
Complexes of the general formula I ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3, which may be the same or different, each represent a straight or branched alkyl radical having 1 to 5 carbon atoms or together with the adjacent nitrogen atom a heterocyclic radical having 5 to 7 carbon atoms; 'alk' represents a straight or branched alkylene radical having 1 to 5 carbon atoms; R.sub.4 to R.sub.8, which may be the same or different, represent hydrogen, or a hydroxy, alkoxy, aryloxy or primary secondary or tertiary amino group, or the group -alk-N.sup.+ (R.sub.1 R.sub.2 R.sub.3) wherein 'alk', R.sub.1, R.sub.2 and R.sub.3 have the meanings given above; M represents a transition metal such as Fe, Ru or Os; X represents an anion and n is an integer corresponding to the number of positive charges of the complex.
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