Metal carbonyl 18-electron complexes is sometimes catalysed by catalytic amounts of oxidants, via electron-transfer. Metal carbonyls react with reducing agents such as metallic sodium or sodium amalgam to give carbonylmetalate (or carbonylate) anions: For iron pentacarbonyl, one obtains the tetracarbonylferrate with loss of CO: Mercury can insert into the metal-metal bonds of some polynuclear metal carbonyls: The CO ligand is often susceptible to attack by nucleophiles. For example, trimethylamine oxide and bistrimethylsilylamide convert CO ligands to CO and CN, respectively. In the "Hieber base reaction", hydroxide ion attacks the CO ligand to give a metallacarboxylic acid, followed by the release of carbon
Mercury in fiction Mercury in fiction The planet Mercury has often been used as a setting in science fiction. Recurring themes include the dangers of being exposed to solar radiation and the possibility of escaping excessive radiation by staying within the planet's slow-moving terminator (the boundary between day and night). Another recurring theme is autocratic governments, perhaps because of an association of Mercury with hot-temperedness. Giovanni Schiaparelli announced in 1889 that Mercury was tidally locked to the Sun, orbiting with one face permanently turned toward it and another face turned away. Theories stated that the "brightside" had molten metal puddles, the "darkside" had