Chemistry Of Precious Metals ✦ Tested & Limited

Precious metals display a wide variety of oxidation states, though they generally prefer low-spin configurations: Predominantly +1positive 1 . It forms linear complexes like Gold (Au): Commonly +1positive 1 +3positive 3 typically adopts a square planar geometry.

The most significant chemical application of precious metals is in .

Rhodium (Rh) is uniquely efficient at reducing nitrogen oxides ( NOxcap N cap O sub x Chemistry of Precious Metals

Precious metals are often called "noble" because they resist oxidation and protonic acids.

Metals like Palladium (Pd) and Platinum (Pt) have a high affinity for hydrogen and unsaturated hydrocarbons. Pd can absorb up to 900 times its own volume of hydrogen gas, making it essential for hydrogenation reactions. Precious metals display a wide variety of oxidation

). This means they prefer to remain in their metallic (0) state rather than forming ions.

Notable for reaching very high oxidation states. Osmium tetroxide ( OsO4cap O s cap O sub 4 ) features Os in the +8positive 8 state and is a powerful (though toxic) oxidizing agent. 5. Emerging Applications: Photochemistry and Medicine Cancer Treatment: Cisplatin ( Rhodium (Rh) is uniquely efficient at reducing nitrogen

Precious metals form stable bonds with carbon, leading to critical catalysts like the Grubbs' catalyst (Ruthenium) for olefin metathesis or Wilkinson’s catalyst (Rhodium) for hydrogenation. 4. Oxidation States and Geometry