Tris(dibenzylideneacetone)dipalladium(0)

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Tris(dibenzylideneacetone)­dipalladium(0)
Names
IUPAC name
Tris(dibenzylideneacetone)dipalladium
Other names
Pd2(dba)3
Identifiers
ECHA InfoCard
 100.122.794 Edit this at Wikidata
Properties
C51H42O3Pd2
Molar mass 915.73 g·mol−1
Melting point 152 to 155 °C (306 to 311 °F; 425 to 428 K)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Tris(dibenzylideneacetone)dipalladium(0) or [Pd2(dba)3] is an

homogeneous catalyst in organic synthesis.[1]

Preparation and structure

Pd2(dba)3

First reported in 1970,[2] it is prepared from dibenzylideneacetone and sodium tetrachloropalladate. Because it is commonly recrystallized from chloroform, the complex is often supplied as the adduct [Pd2(dba)3·CHCl3].[1] The purity of samples can be variable.[3]

In [Pd2(dba)3], the pair of Pd atoms are separated by 320 

pm but are tied together by dba units.[4] The Pd(0) centres are bound to the alkene parts of the dba ligands
.

Applications

[Pd2(dba)3] is used as a source of soluble Pd(0), in particular as a

Trost asymmetric allylic alkylation, as well as Buchwald–Hartwig amination.[5]

Related Pd(0) complexes are [Pd(dba)2][6] and tetrakis(triphenylphosphine)palladium(0).

References

  1. ^
    doi:10.1002/047084289X.rt400.pub2
  2. doi:10.1039/C29700001065
    .
  3. doi:10.1021/om201217r
  4. doi:10.1021/ic50138a020
    .
  5. ISBN 978-1-891389-53-5
    .
  6. ^ John R. Stille, F. Christopher Pigge, Christopher S. Regens, Ke Chen, Adrian Ortiz and Martin D. Eastgate "Bis(dibenzylideneacetone)palladium(0)" E-eros. 2013.
    doi:10.1002/047084289X.rb138.pub3
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