Iridium acetate Solid

Iridium acetate Solid Description

Iridium Acetate is a moderately water soluble crystalline Iridium source that decomposes to Iridium oxide on heating. It is generally immediately available in most volumes. Iridium is a chemical element with the symbol Ir and atomic number 77.

A very hard, brittle, silvery-white transition metal of the platinum group, iridium is considered to be the second-densest metal (after osmium) with a density of 22.56 g/cm3 as defined by experimental X-ray crystallography. However, at room temperature and standard atmospheric pressure, iridium has been calculated to have a density of 22.65 g/cm3, 0.04 g/cm3 higher than osmium measured the same way.

Still, the experimental X-ray crystallography value is considered to be the most accurate, and as such iridium is considered to be the second densest element.It is the most corrosion-resistant metal, even at temperatures as high as 2000 °C. Although only certain molten salts and halogens are corrosive to solid iridium, finely divided iridium dust is much more reactive and can be flammable. Iridium was discovered in 1803 among insoluble impurities in natural platinum. Smithson Tennant, the primary discoverer, named iridium after the Greek goddess Iris, personification of the rainbow, because of the striking and diverse colors of its salts.

Iridium is one of the rarest elements in Earth’s crust, with annual production and consumption of only three tonnes. 191Ir and 193Ir are the only two naturally occurring isotopes of iridium, as well as the only stable isotopes; the latter is the more abundant.

The most important iridium compounds in use are the salts and acids it forms with chlorine, though iridium also forms a number of organometallic compounds used in industrial catalysis, and in research.

Iridium metal is employed when high corrosion resistance at high temperatures is needed, as in high-performance spark plugs, crucibles for recrystallization of semiconductors at high temperatures, and electrodes for the production of chlorine in the chloralkali process. Iridium radioisotopes are used in some radioisotope thermoelectric generators. Mostly used in wax oil catalytic cracking and heavy oil catalytic cracking.

The catalytic water-oxidation activity of Wilkinson’s iridium acetate trimer has been characterized electrochemically and by using chemical oxidants. Results show it can function as an operationally homogeneous water-oxidation catalyst when driven with sodium periodate as a primary oxidant, but rapidly decomposes using Ce(IV) as a primary oxidant.

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