In heterogeneous catalysis, the catalyst is in a different phase from the reactants. Safety of 1,1′-Bis(di-tert-butylphosphino)ferrocene-palladium dichloride, At least one of the reactants interacts with the solid surface in a physical process called adsorption in such a way. 95408-45-0, name is 1,1′-Bis(di-tert-butylphosphino)ferrocene-palladium dichloride. In an article，Which mentioned a new discovery about 95408-45-0
The reaction of [Pd(dtbpf)Cl2] (dtbpf = 1,1?-bis(di-tert-butylphosphino)ferrocene) with sodium bromide yields [Pd(dtbpf)Br][Br], which displays an interaction between the iron and palladium atoms. The structure of this compound has been obtained and is compared to those of the previously reported [Pd(dtbpf)X]+ (X = Cl, I) analogues. Similar to [Pd(dtbpf)Cl]+, [Pd(dtbpf)Br]+ appears to undergo a solid-state isomerization at low temperature to a species in which the Fe-Pd interaction is disrupted. In addition to 1H and 31P{1H} NMR and visible spectroscopy, the [Pd(dtbpf)X]+ (X = Cl, Br) compounds were also characterized by zero-field 57Fe Moessbauer spectroscopy. DFT calculations on [Pd(dtbpf)X]+ (X = Cl, Br, I) show that the Fe-Pd interaction is weak and noncovalent and that the strength of the interaction decreases as the halide becomes larger. A related trend is noted in the potential at which oxidation of the iron center occurs; the larger the halide, the less positive the potential at which oxidation occurs. Finally, the catalytic activity of [Pd(dtbpf)X]+ (X = Cl, Br, I) in the arylation of an aromatic ketone was examined and compared to the activity of [Pd(dtbpf)Cl2].
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Reference：
Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method