Shishilov, Oleg N. published the artcilePalladium Nitrosyl Complexes as Highly Versatile Catalysts for C-H/C-H Oxidative Coupling of Arenes: Application Area and Insight into Mechanism, Formula: C14H14, the publication is ChemistrySelect (2021), 6(8), 1795-1803, database is CAplus.
Palladium nitrosyl carboxylates Pd3(NO)2(CX3CO2)4(ArH)2 (X = Cl, Ar = Ph; X = F, Ar = Tol) were found to be effective catalysts for synthesis of biaryls Ar1Ar2 = [Ar1 = 4-MeC6H4, 2-ClC6H4, 3-F3CC6H4, etc.; Ar2 = 2-MeC6H4, 2-ClC6H4, 3-F3CC6H4, etc.] via C-H/C-H oxidative homocoupling of arenes bearing electron-donor as well as electron-withdrawing groups (EWG). Trifluoroacetate complex Pd3(NO)2(CX3CO2)4(ArH)2 (X=F, Ar=Tol) was found to be more promising due to higher stability under the reaction conditions. Trifluoroacetate complex also showed high performance in intramol. coupling in diarylsulfides, diarylethers and diarylamines gave corresponding dibenzothiophenes/dibenzofurans/carbazoles I [R1 = H, Me; R2 = H, Me, CF3, etc.; Y = O, S, NH] with yields ranged from moderate to high. The plausible mechanism was studied by DFT computational anal. basing on Pd3 linear complexes as major active species. It was found that two deprotonation steps proceeded in two different ways: for the first deprotonation SEAr was most probable pathway while for the second one concerted metalation-deprotonation (CMD) was preferable. That could explain high tolerance of the system to different substrates: SEAr was favorable in the presence of electron donor group and EWG facilitated CMD. NO group was found to be involved into the CMD pathway and that was the rate-determining step with the highest activation barrier.
ChemistrySelect published new progress about 613-33-2. 613-33-2 belongs to catalysis-chemistry, auxiliary class Benzene, name is 4,4′-Dimethyldiphenyl, and the molecular formula is C9H11BO4, Formula: C14H14.
Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia