Iron pentacarbonyl

• Pentacarbonyliron
• Iron carbonyl
• IPC (I for iron )

Oily yellow to red liquid with musty odor

Liquid

1.45 g · cm -3 ( 25 ° C)

-21 ° C.

105 ° C.

31 hPa ( 20 ° C)

Very bad ( 200 mg / l ) in water

1.453 (22 ° C)

Risk

25 mg · kg -1 ( LD50, rat, oral)

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Iron pentacarbonyl is a chemical compound, and the simplest of the three well-known carbonyls of iron. It is up to standard conditions as a yellow liquid.

Production

Technically iron pentacarbonyl is prepared from a finely divided iron, and carbon monoxide at 150 to 200 ° C under a pressure of 100 bar. Pure iron oxide without reacting with CO at room temperature and normal pressure.

It can be purified by distillation, and reproduces its decomposition above 150 ° C carbon monoxide in addition to a particularly pure iron powder ( 99.98 to 99.999 % of iron ), the so-called carbonyl iron.

Use

Iron pentacarbonyl is a basic material for the synthesis of organometallic iron compounds that have as a versatile catalytic properties.

Earlier it was used as an antiknock agent in gasoline, for example, in Motalin ( premium gasoline based on the Leuna synthetic gasoline in Germany during the 1920s and 1930s ). However, this use was abandoned because iron oxides were deposited in the engine and the spark plugs. Iron pentacarbonyl with 92 RON at an addition concentration of about 6.5 g / L had been reached.

Iron pentacarbonyl existed in the GDR as a rust stopper or rust inhibitor. It was used to remove rust stains on metal surfaces or as a primer coating on steel. This was a red-brown, slightly oily liquid with a faint odor.