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Coordination Chemistry of the Chiral, Facially Coordinating Tridentate Ligand 1,2‐Bis(benzimidazol‐2‐yl)ethanol with 3d Transition Metals
Author(s) -
Granelli Matteo,
Downward Alan M.,
Deville Claire,
Franco Alejandro Rodriguez,
Guénée Laure,
Besnard Céline,
Williams Alan F.
Publication year - 2018
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201800778
Subject(s) - chemistry , protonation , ligand (biochemistry) , valence (chemistry) , stereochemistry , diastereomer , vanadium , transition metal , octahedron , divalent , medicinal chemistry , crystallography , coordination complex , metal ions in aqueous solution , metal , ion , inorganic chemistry , crystal structure , organic chemistry , catalysis , biochemistry , receptor
1,2‐Bis(benzimidazol‐2‐yl)ethanol ( 1 ) and its bis‐ N ‐methylated derivative ( 2 ) act as chiral tridentate facially coordinating ligands capable of binding metals right across the d‐series. Octahedral complexes of divalent and trivalent metal ions are synthesised and characterised by X‐ray crystallography. Only two of the three possible diastereomers are observed in complexes of the type [M( 1,2 ) 2 ] and appear to be close in energy. In complexes of M II ions, the alcohol function of the ligand stays protonated, but the proton is lost in complexes of M III ions. Electronic and CD spectra are reported. Slow oxidation of the vanadium(III) complex leads to a mixed valence compound where one ligand has been oxidised.