Homogeneous and heterogeneous dehydrogenation reactions of cyclooctane with palladium(II) complexes as catalysts

Catalytic dehydrogenation of cyclooctane with titanium, zirconium and hafnium metallocene complexes

“…For [Ir(cod)LL]X complexes (L = N,N-chelating ligands, amines, phosphines; X = Cl, PF 6 ] and cyclooctane TONs up to 40 were obtained [45]. Pd (II) complexes in similar CH activation reactions gave TONs of 18 [46], complexes with group IV metals and N,O chelating ligands TONs of 19 [47]. The highest TON (237) of all CH activation investigations were found for Cp 2 ZrCl 2 /MAO and cyclooctane [41] (Scheme 9).…”

Ligand‐Promoted Palladium‐Catalyzed C−H Acetoxylation of Simple Arenes

“…In addition, similarr esults were observed if the CÀHa cetoxylation of benzene was performed by using picolinic acid as the ligand.I nt his case, the solid that precipitated from the reactionw as identified as palladium complex 3. [15] Both palladium complexesw eref ound to be insoluble at room temperature in all solvents tested and nearly inactive in the CÀHa cetoxylation of benzene. Indeed, the CÀHa cetoxylationo fb enzene in the presence of complex 2 (2 mol %) at 100 8Ca fter 14 hp rovided phenyl acetate (1)i no nly 15 %y ield.…”

Influence of triphenylphosphine on the activity of heterogeneous iridium, rhodium and platinum containing catalysts for the dehydrogenation of saturated hydrocarbons

“…After previously published results [20][21][22][23][24][25] we report now the heterogenization of various complexes of iridium, rhodium and platinum leading to efficient dehydrogenation catalysts for isopentane and other hydrocarbons.…”