Syntheses, structures and coordination modes of acetatopalladium(II) complexes with 1,3-bis(2-arylimino)isoindoline ligands of different steric influence was written by Broering, Martin;Kleeberg, Christian;Tejero, Esther Consul. And the article was included in European Journal of Inorganic Chemistry in 2007.Recommanded Product: 3,6-Dimethyl-2-pyridinamine This article mentions the following:
Acetatopalladium(II) chelate complexes I (12 X = C, R1 = R2 = R3 = H; 14 X = C, R1 = R3 = Me, R2 = H; 15 X = N, R3 absent, R1 = H, R2 = Me) and tetranuclear palladacycles II (13) of 1,3-bis(2-arylimino)isoindoline (bai) ligands (4–7; L1-L4) with different degrees of steric congestion were prepared and characterized by NMR and XRD with respect to nuclearity and coordination mode. In particular, the propensity for heteroaryl ring rotation and C-H activation was investigated. Palladium(II) ions bind to bai ligands in different coordination modes, either as classical Werner-type N,N,N bonded complexes or as carbometalated C,N,N chelates after pyridyl ring rotation and C-H activation. In the latter case two (bai*)-Pd(OAc) subunits form acetato-bridged dimeric structure in the complex 13. These stable and electroneutral tetranuclear species are of low solubility in non-donor solvents, but break up into soluble dinuclear species of unknown composition upon the addition of DMSO, azide or cyanide. Attempts to activate C-C bonds by this strategy were not successful. Surprisingly, the exchange of the terminal pyridines by pyrimidines does not result in the formation of oligonuclear or oligomeric species. Besides the degree of steric hindrance, three more factors, specifically, solubility of the products, stoichiometry of metal precursor and charge compensation, were identified to govern the outcome of the metalation of these bai ligands. In the experiment, the researchers used many compounds, for example, 3,6-Dimethyl-2-pyridinamine (cas: 823-61-0Recommanded Product: 3,6-Dimethyl-2-pyridinamine).
3,6-Dimethyl-2-pyridinamine (cas: 823-61-0) belongs to pyridine derivatives. In contrast to benzene, Pyridine’s electron density is not evenly distributed over the ring, reflecting the negative inductive effect of the nitrogen atom. Halopyridines are particularly attractive synthetic building blocks in a variety of cross-coupling methods, including the Suzuki-Miyaura cross-coupling reaction.Recommanded Product: 3,6-Dimethyl-2-pyridinamine