Chemistry is traditionally divided into organic and inorganic chemistry. Application In Synthesis of (2,2¡ä-Bipyridine)dichloropalladium(II), The former is the study of compounds containing at least one carbon-hydrogen bonds.In a patent£¬Which mentioned a new discovery about 14871-92-2
New complexes of palladium(II) with chelating heterocyclic nitrogen ligands. Characterization and catalytic in CO-styrene copolymerization. Crystal structure of [Pd(bipy)2][BAr?4]2, Ar? = [3,5-(CF3)2C6H’3]
New bis-chelated palladium (II) derivatives [Pd(bipyR)2]2+ and [Pd(bipy)(bipyR)]2+ (bipy = 2,2?-bypiridine, bipyR = 6-Me, 6-Et, 6-i-Pr-2,2?-bipyridine) have been isolated as [BAr?4]- salts (Ar?=[3,5-(CF3)2C6H3]) and tested as catalyst precursors in the CO-styrene or 4-tert-butylstyrene (TBS) copolymerization. The comparison of their activity with that of [Pd(bipy)2][BAr?4]2 prepared for comparative purpose shows that the presence of a 6-substituent on the bipy has a negative effect. On the other hand, comparison of the activities of [Pd(bipy)2][BAr?4]2 and [Pd(bipy)2][PF6]2, reported to be one of the best catalytic precursors for this reaction, shows that the [BAr?4]- anion increases the activity under various reaction conditions. The results obtained with [Pd(bipy)2][BAr?4]2 at low pressure (pCO = 10 atm) are among the best reported for this type of precatalysts. A study related to the use of 2,2,2-trifluoroethanol (TFE), as solvent, allows the optimisation of the amount of alcohol required for the copolymerization reaction. The X-ray structure of [Pd(bipy)2][BAr?4]2 shows that the conformation of the cation is similar to that observed in the corresponding [BF4]- salt, but remarkably different from that of [Pd(bipy)2][PF6]2.
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Reference£º
Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method