IRON DODECACARBONYL Chemische Eigenschaften,Einsatz,Produktion Methoden
R-S?tze Betriebsanweisung:
R11:Leichtentzündlich.
R23/24/25:Giftig beim Einatmen, Verschlucken und Berührung mit der Haut.
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
S-S?tze Betriebsanweisung:
S16:Von Zündquellen fernhalten - Nicht rauchen.
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S28:Bei Berührung mit der Haut sofort abwaschen mit viel . . . (vom Hersteller anzugeben).
S33:Ma?nahmen gegen elektrostatische Aufladungen treffen.
S36/37/39:Bei der Arbeit geeignete Schutzkleidung,Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
S45:Bei Unfall oder Unwohlsein sofort Arzt zuziehen (wenn m?glich, dieses Etikett vorzeigen).
S7/9:Beh?lter dicht geschlossen an einem gut gelüfteten Ort aufbewahren.
Chemische Eigenschaften
Tri-iron dodecacarbonyl
forms deep green, diamagnetic crystals which decompose at 140°C, but which can be sublimed
slowly in vacuo. It dissolves in organic solvents and in pentacarbonyl iron in which
its molecular weight corresponds to Fe3(CO)12.
synthetische
Tri-iron Dodecacarbonyl was first obtained by thermal decomposition of non aqueous solutions
of the enneacarbonyl at 100°C :
6Fe2(CO)9 -> 2Fe3(CO)12+6Fe(CO)5
but is now usually prepared from solutions of carbonylferrate anions. One method uses
the oxidation of these ions with manganese(IV) oxide followed by acidification and extraction
of the carbonyl into petroleum ether. In another method,iron pentacarbonyl
is treated with aqueous triethylamine to form the dark red [Et3NH][Fe3(CO)11H] which is
then acidified and the carbonyl extracted into petroleum ether.
Structure and conformation
The structure of Fe3(CO)12 (Fig.9) is related to that of Fe2(CO)9 in that it can be
described as a triangular metal cluster in which one bridging group of the Fe2(CO)9 system is replaced by an Fe(CO)4 group. This X-ray data is in agreement with the Mssbauer
spectrum which shows the presence of two types of iron atom ; two of the iron atoms
show substantial quadrupole splitting and have isomer shifts similar to those of the iron
atoms in Fe2(CO)9, while the other iron atom shows little splitting as might be expected for
an octahedral environment. A similar structure is possessed by the [Fe3(CO)11H] anion in
which one of the bridging carbonyl groups is replaced by a bridging hydrogen atom.
IRON DODECACARBONYL Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
