Molar mass 949.4 g/mol | Appearance colorless solid | |
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Karstedt's catalyst is an organoplatinum compound derived from divinyl-containing disiloxane. This coordination complex is widely used in hydrosilylation catalysis. It is a colorless solid that is generally assumed to be a mixture of related Pt(0) alkene complexes. The catalyst is named after Bruce D. Karstedt, who developed it in the early 1970s while working for General Electric.
Contents
Applications
Carbon-silicon bonds are created via hydrosilylation reactions. This reaction has very important applications to industry. While it is favorable thermodynamically, hydrosilylation does not proceed in the absence of a catalyst. It is produced by treatment of chloroplatinic acid by the divinyltetramethyldisiloxane.
The catalyst can also be used in a reductive amination reaction between a carboxylic acid and an amine with phenylsilane as the reducing agent.
Structure and bonding
The oxidation state of the platinum is 0. Using X-ray crystallography, the structure of the complex Pt2[(Me2SiCH=CH2)2O]3 has been confirmed. Each Pt(0) center is surrounded by three alkene ligands. The Pt center and six coordinated carbon atoms are approximately coplanar, as found for simpler complexes such as Pt(C2H4)3.