New Directions in Iron‐Cyanide Chemistry Stephen A. Koch, Department of Chemistry State University of New York, Stony Brook, Stony Brook, NY 11794‐3400,
[email protected] Iron(CN)x(CO)y centers are present at the active sites of the two major class of hydrogenase enzymes. As an extension of investigations on fundamental Iron cyanide chemistry, ruthenium and osmium cyanide compounds have been synthesized and characterized. As was the case for iron, [Ru(CN)xLy]n and [Os(CN)xLy]n complexes where L are monodentate ligands and x is less than five were virtually unknown. New compounds include [RuII(CN)5(CO)]3‐, [RuII(CN)4(CO)2]2‐ and [RuII(CN)4(pyridine)(CO)]2‐. A key goal is the development of systems that mimic the reactivity of the hydrogenase enzymes.
O1
O1
O1
C1
C3
N3 C1 C5 C3
N5
C1
N1
N3
C2
C2 Ru1
N2
N2
C2
C1
C3 Ru1
N4
Ru1
C4
N1
C5 N5
N2
C2
N1
C3
N2
C4
C6 N6 O1
N4
[RuII(CN)5(CO)]3-
trans-[RuII(CN)4(CO)2]2-
trans-[RuII(CN)4(CO)(py)]2-