Reference of 14220-64-5, Chemistry is the science of change. But why do chemical reactions take place? Why do chemicals react with each other? The answer is in thermodynamics and kinetics.In a document type is Article, and a compound is mentioned, 14220-64-5, Bis(benzonitrile)palladium chloride, introducing its new discovery.
Synthesis and dynamic NMR studies of rhenium(I) tricarbonyl bromide complexes of benzimidazolylpyridine ligands. Crystal structure of [ReBr(CO)3{2,6-bis(1?, 5?, 6?-trimethylbenzimidazol-2?-yl)pyridine}]
Pentacarbonylbromorhenium(I) reacted with 2,6-bis(benzimidazol-2?-yl)pyridine (bbip), 2,6-bis(1?-methylbenzimidazol-2?-yl)pyridine (bmbip), 2,6-bis(5?,6?-dimethylbenzimidazol-2?-yl)pyridine (bdmbip), and 2,6-bis(1?,5?,6?-trimethylbenzimidazol-2?-yl)pyridine (btmbip) to form stable octahedral complexes of type fac-[ReBr(CO)3L] (L=bbip, bmbip, bdmbip or btmbip) in which L is acting as a bidentate chelate ligand. At above-ambient temperatures in solution the complexes are fluxional with the nitrogen ligand oscillating between equivalent bidentate bonding modes. Rates and activation energies for these fluxions have been investigated by NMR methods. At low temperatures rotation of the uncoordinated benzimidazolyl unit is restricted and for fac-[ReBr(CO)3(btmbip)] in CD2Cl2 solution, two preferred rotamers exist in 89:11% relative abundances. A rotational energy barrier has been estimated. The X-ray crystal structure of fac-[ReBr(CO)3)(btmbip)] confirms the bidentate chelate bonding of btmbip with a N-Re-N angle of 74.2. The pendant benzimidazole unit is inclined at an angle of 60.7 to the pyridine ring.
Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.Reference of 14220-64-5. In my other articles, you can also check out more blogs about 14220-64-5
Reference：
Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method