Deciphering preferred geometries of pyridylmethylamines-based complexes: A robust strategy combining NMR, DFT and X-ray
作者:Benjamin Large、Maissa Meddeb、José Enrique Herbert Pucheta、Anne Gaucher、Marie Cordier、Corinne Gosmini、Jonathan Farjon、Audrey Auffrant、Damien Prim
DOI:10.1016/j.ica.2019.119070
日期:2019.12
a clear identification and characterization of preferred conformations and configurations at an atomic resolution. Our study has evidenced some key features of the overall 3D structure of pma-Zn and pma-Co complexes which shapes are set by the geometry of the metallacycle, the configuration of the sp3 nitrogen atom, the equatorial position of the benzyl side arm as well as the preferred spatial arrangement
Synthesis and in vitro antitumour activity of PtCl2 complexes of pyridine- and quinoline-amine and -imine ligands and of carbocyclic ethylenediamine ligands
Synthesis and structures of copper(II) complexes containing N,N-bidentate N-substituted phenylethanamine derivatives as pre-catalysts for heterotactic-enriched polylactide
A series of Cu(II) complexes, [(LCuCl2)-Cu-n](2) (L-n = (S)-N-((1H-pyrazol-1-yl)methyl)-1-phenylethanamine (L-1), (S)-N((3,5-dimethyl-1H-pyrazol-1-yl)methyl)-1-phenylethanamine (L-2) and (S)-1-phenyl-N-((pyridin-2-yl)methyl)ethanamine (L-3)) were synthesised and characterised. X-ray diffraction analysis revealed that the molecular structures of these distorted square planar Cu(II) complexes were dimeric with two asymmetric units crystallised in the (S-C, S-N) and (S-C, R-N) configurations. These are rare examples of dimeric Cu(II) complexes. The alkoxide derivatives, generated in situ, catalysed the ring-opening polymerisation of rac-lactide in a controlled fashion and displayed high activities (2 or 3 min for complete conversion). Heterotactic-enriched polylactide (with P-r up to 0.86) was formed using these initiators at room temperature in CH2Cl2. (C) 2019 Elsevier Ltd. All rights reserved.