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Structural Analysis of Chiral Complexes of Palladium(0) with 15‐Membered Triolefinic Macrocyclic Ligands
Author(s) -
PlaQuintana Anna,
Roglans Anna,
de JuliánOrtiz J. Vicente,
MorenoMañas Marcial,
Parella Teodor,
BenetBuchholz Jordi,
Solans Xavier
Publication year - 2005
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.200401073
Subject(s) - palladium , olefin fiber , chemistry , metal , aryl , crystallography , diffraction , ligand (biochemistry) , nuclear magnetic resonance spectroscopy , stereochemistry , organic chemistry , catalysis , biochemistry , alkyl , physics , receptor , optics
The complete structural analysis of the palladium complexes of the triolefinic macrocycles ( E,E,E )‐1,6,11‐tris(arylsulfonyl)‐1,6,11‐triazacyclopentadeca‐3,8,13‐trienes, which featured from three identical to three different aryl groups, was achieved by performing X‐ray diffraction studies, NMR spectroscopy, and other calculations. The stereochemical complexity is determined by the different isomers formed through complexation of the metal to one or other face of each of the three olefins involved. The palladacyclopropane formulation of the palladium–olefin interaction offers a clear picture of the stereogenicity of the olefin carbon atoms that are complexed to the metal. The energetically favorable isomers were identified in the solid‐state and in solution by performing X‐ray diffraction and NMR spectroscopic analysis, respectively.