How is (2-Butenyl)chloropalladium dimer (CAS: 12081-22-0) typically synthesized?

(2-Butenyl)chloropalladium dimer is synthesized through palladium-catalyzed chlorination of 2-butene. The process involves the use of palladium as a catalyst, typically in the presence of a chloride source. The reaction is carried out under an inert atmosphere to avoid decomposition. High yields and good selectivity are achieved under optimized conditions, but precise control of reaction parameters is essential for reproducibility.