Complexes with diastereoisomeric ligands. 1. Copper(II) complexes with the tridentate Schiff bases of (1R)-3-(hydroxymethylene)camphor or (1R)-2-(hydroxymethylene)methone and (S)- or (R)-amino acids

N-Salicylideneamino acidato complexes of oxovanadium(iv). The cysteine and penicillamine complexes

“…In general the V IV O complexes derived from Hsal possess a lowenergy absorption band around 373 nm (CD) or 375 (absorption), which can be attributed to a  → * transition originating mainly in the azomethine chromophore. For L-amino acids, these bands display Cotton effects of negative sign in the CD spectra, as found for the related zinc, 58 copper [63][64][65] and cobalt(II) 66 chelates. This CD band was found at 376 nm in 2, 380 nm in 3 and 385 nm in 6.…”

(E)-3-(1-Naphthylamino)methylene-(+)-camphor

“…For the conformations of -ketoamines, see: Zharkova et al (2009). For chiral camphor-derived -aminoketonate ligands, see: Everett & Powers (1970); Casella et al (1979). For reactions involving aminoketonate complexes, see: Hsu, Chang et al (2004); Hsu, Li et al (2007); Lai et al (2005); Pan et al (2008); Wang et al (2006).…”

“…β-Aminoketonate complexes have been used effectively in stoichiometric (Hsu, Chang et al, 2004;Hsu, Li et al, 2007) and catalytic processes, such as Suzuki cross-coupling (Lai et al, 2005), polymerization (Wang et al, 2006) and copolymerization (Pan et al, 2008) reactions. Interestingly, there are only a few reports on chiral camphor-derived β-aminoketonate ligands (Everett & Powers, 1970;Casella et al, 1979). Generally, β-ketoamines have Z conformations that are stabilized by intramolecular hydrogen bonding (Zharkova et al, 2009).…”