Editing Palladium (section)

===Palladium(II)===
[[Palladium(II) chloride]] is the principal starting material for other palladium compounds. It arises by the reaction of palladium with chlorine. It is used to prepare heterogeneous palladium catalysts such as palladium on barium sulfate, palladium on carbon, and palladium chloride on carbon.<ref>{{OrgSynth|title = Palladium Catalysts|author = Mozingo, Ralph |collvol = 3|collvolpages = 685|year = 1955|prep = cv3p0685}}</ref> Solutions of PdCl<sub>2</sub> in nitric acid react with [[acetic acid]] to give [[palladium(II) acetate]], also a versatile reagent. PdCl<sub>2</sub> reacts with [[ligands]] (L) to give square planar complexes of the type PdCl<sub>2</sub>L<sub>2</sub>. One example of such complexes is the [[benzonitrile]] derivative [[Bis(benzonitrile)palladium dichloride|PdCl<sub>2</sub>(PhCN)<sub>2</sub>]].<ref>{{cite book |pages=60–63 |volume=28 |doi=10.1002/9780470132593.ch13 |date=1990 |first1=Gordon K. |last1=Anderson |first2=Minren |last2=Lin |last3=Sen |first3=Ayusman |last4=Gretz |first4=Efi |title=Inorganic Syntheses |chapter=Bis(Benzonitrile)Dichloro Complexes of Palladium and Platinum |isbn=978-0-470-13259-3}}</ref><ref>{{cite journal |doi=10.1134/S1070328408110110 |title=Palladium complexes based on optically active terpene derivatives of ethylenediamine |journal=Russian Journal of Coordination Chemistry |volume=34 |issue=11 |pages=855–857 |year=2008 |last1=Zalevskaya |first1=O. A |last2=Vorob'eva |first2=E. G |last3=Dvornikova |first3=I. A |last4=Kuchin |first4=A. V |s2cid=95529734}}</ref>

{{block indent|1= PdCl<sub>2</sub> + 2 L → PdCl<sub>2</sub>L<sub>2</sub> (L = [[PhCN]], [[Triphenylphosphine|PPh<sub>3</sub>]], [[Ammonia|NH<sub>3</sub>]], etc.)}}

The complex [[bis(triphenylphosphine)palladium(II) dichloride]] is a useful catalyst.<ref>{{OrgSynth|title = Palladium-catalyzed reaction of 1-alkenylboronates with vinylic halides: (1Z,3E)-1-Phenyl-1,3-octadiene|collvol = 8|collvolpages = 532|author1-link=Norio Miyaura|author1= Miyaura, Norio|author2 = Suzuki, Akira|name-list-style=amp|year = 1993|prep = cv8p0532}}</ref>

[[File:Pd(OAc)2.jpg|thumb|left|[[Palladium(II) acetate]]]]
[[File:Platinum-palladium ore, Stillwater mine MT.JPG|thumb|Platinum-palladium ore from the Stillwater mine in the Beartooth Mountains, Montana, US]]
[[File:Sulfidic serpentintite (platinum-palladium ore) Johns-Manville Reef, Stillwater Complex.jpg|thumb|Sulfidic serpentintite (platinum-palladium ore) from the Stillwater mine in Montana]]