He discovered nickel carbonyl, a previously unknown compound and the first-discovered in the class of metal carbonyls, which could be easily Clydach, near Swansea, Wales for final purification.
12.
Nickel carbonyl is formed with carbon monoxide already at 80 �C and atmospheric pressure, finely divided iron reacts at temperatures between 150 and 200 �C and a carbon monoxide pressure of 50 to 200 bar.
13.
The Occupational Safety and Health Administration ( OSHA ) has set the legal limit ( permissible exposure limit ) for the workplace at 1 mg / m 3 per 8-hour workday, excluding nickel carbonyl.
14.
Iron carbonyl is stable as iron pentacarbonyl, where five carbon monoxide molecules are pendantly bonded to the iron atom, while nickel carbonyl is stable as nickel tetracarbonyl, which has four carbon monoxide molecules pendantly bonded to the nickel atom.
15.
The reaction with nickel tetracarbonyl, for example, proceeds through an unstable acyl nickel carbonyl complex which then undergoes electrophilic substitution to give the desired aldehyde ( using H + as the electrophile ) or ketone ( using an alkyl halide ) product.
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