Synthesis and structural characterization of rhodium(I) and iridium(I) complexes of the asymmetric tetradentate PPNN ligand 2,2'-bis[[o-(diphenylphosphino)benzylidene]amino]-6,6'-dimethylbiphenyl

New cationic palladium (II) and rhodium (I) complexes of [Ph2PCH2C(Ph)N(2,6-Me2C6H3)]

“…The 31 P{ 1 H} NMR (CD 2 Cl 2 ) resonance in 4 (doublet at d = 61.9, 1 J RhP = 176 Hz) is shifted downfield from that of the free ligand [Ph 2 PCH 2 C(Ph)@N(2,6-Me 2 C 6 H 3 )] (L) (isomer Z, d = À19.8). A shift of this magnitude is typical for Rh(I) complexes incorporating chelating N/P ligands [74][75][76][77]. In addition, the magnitude of the Rh-P coupling constant is typical for square planar complexes with a trans N-Rh-P coordination [74].…”

Chiral Neutral Zirconium Amidate Complexes for the Asymmetric Hydroamination of Alkenes

“…In fact, ( S )‐(−)‐2,2′‐diamino‐6,6′‐dimethylbiphenyl has negative specific rotation in non‐acidic solvents ([α] D =−51.7°±2.4 in EtOH,1 [α] D =+34° in 10% HCl2). 3 Thus, the resolution of racemic 2,2′‐diamino‐6,6′‐dimethylbiphenyl in the Supporting Information should be corrected to read L ‐(+)‐tartaric acid (sometimes given as d ‐tartaric acid in the literature3) gives ( R )‐(+)‐2,2′‐diamino‐6,6′‐dimethylbiphenyl. Then ( S )‐(−)‐2,2′‐diamino‐6,6′‐dimethylbiphenyl enriched materials can be resolved with D ‐(−)‐tartaric acid.…”

Oligomerisation of ethene by new palladium iminophosphine catalysts

“…7 We envisaged that these features might be exploited in tuning the reactivity of Pd complexes in alkene coupling reactions. For this purpose, we synthesised new iminophosphine ligands 3 from the corresponding amine and aldehyde 8 as shown in Scheme 1.…”