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David Reed Created 2026-10-20 Updated 2026-11-05
Iridium is the chemical element with atomic number 77 and symbol . It is a transition metal. It is a dense platinum-group metal with strong corrosion resistance. Iridium-containing complexes and oxides can serve as catalysts, illustrating how oxidation state and coordination change the behavior of a chemically resistant bulk metal.
John David Kennedy Created 2026-10-24 Updated 2026-11-05
John David Kennedy coauthored research with Norman Greenwood and David Reed on reactions of the octahydrotriborate anion with transition-metal complexes. The work characterizes a borallyl iridium product, connecting boron-hydride cluster chemistry with metal coordination.
A cluster fragment can bind a metal through more than one atom. Establishing that connectivity requires evidence about the actual product, rather than assuming that every boron-hydride reagent retains its starting geometry.[ref]
Reactions of the octahydrotriborate(1-) anion, B3H8-, with some complexes of cobalt(I), cobalt(II), rhodium(I), and iridium(I), and the characterization of the borallyl complex IrIII(eta3-B3H7)(CO)H(PPh3)2 by Norman N. Greenwood and others. Abstract: reactions and characterized borallyl iridium product
Journal of the Chemical Society, Dalton Transactions, 196–200. The published title uses bracketed formulas and superscript oxidation states. The original abstract records octahydrotriborate reactions and a borallyl iridium product; it must not be cited as direct crystallographic proof of a different rhodium compound.