In homogeneous catalysis, the catalyst is in the same phase as the reactant. The number of collisions between reactants and catalyst is at a maximum.In a patent, 31886-57-4, name is (S)-N,N-Dimethyl-1-ferrocenylethylamine, introducing its new discovery. Quality Control of (S)-N,N-Dimethyl-1-ferrocenylethylamine
Relationships between basicity, redox behaviour of ferrocenylamines and their reactivity with Pt[II] compounds
pKb values for the ferrocenylamines, [(eta-C5H4(CH2)xNH2)FeC p] x=1, 2, 3; [(eta-C5H4CH2NHR)FeCp] R=Me, 4, Ph, 5; {[eta-C5H4CHR?NR2]FeCp} R?/R=H/Me, 6, R?/R=H/Ph, 7, Me/Me, 8;[{eta-C5H4CHRNMe2)2Fe] R=H 9, Me 10; [{1,2eta-C5H3(CH2NMe2)(PPh2)}FeCp] 11, {1,2eta-C5H3[CH(Me)NMe2](PR2}}Fe[eta-C5H4(PPh2)n] n=0, R=iPr 12, Ph 13, n=1, R=Me 14, are correlated with inductive, neighbouring group and steric effects. Corresponding salts have been synthesised. The pKb has a marked influence on their chemistry. Protonation competes with complexation but cis-PtCl2L2 L=1-3, 5, 7, and cis-Pt(N-N)Cl2 L=8, 9, have been characterised. Two reversible couples [Fc+A/FcA], [Fc+AH+/FcAH+] (A=amine function) and an irreversible oxidation/protonation of A are linked by a EECE mechanism, but potentials for the first two are independent of the amine and similar to ferrocene. Nucleophilic attack by ferrocenylamines at the nitrile, protonation and ligand substitution are all observed with cis-[PtCl2(NCR)2].
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Reference£º
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis¡ªI. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis