Open AccessA sterically constrained bis(2,2′:6′,2′′‐terpyridine) ligand
Author(s) -
Benniston Andrew C.,
Clegg William,
Harrington Ross W.,
Li Peiyi
Publication year - 2004
Publication title -
acta crystallographica section e
Language(s) - English
Resource type - Journals
ISSN - 1600-5368
DOI - 10.1107/s1600536804030594
Subject(s) - steric effects , terpyridine , chemistry , ligand (biochemistry) , pyridine , crown ether , chelation , ring (chemistry) , stereochemistry , medicinal chemistry , ether , metal , crystallography , ion , organic chemistry , receptor , biochemistry
The title compound, 4,4′‐bis[(2,2′:6′,2′′‐terpyridin‐4‐yl)ethynyl]‐2,2′‐(3,6,9‐trioxaundecane‐1,11‐diyldioxy)‐1,1′‐biphenylethyl acetate solvate, C 54 H 42 N 6 O 5 ·C 4 H 8 O 2 , is a sterically constrained ligand based on the well‐known chelator 2,2′:6′,2′′‐terpyridine (terpy). Two terpy units are linked by ethynyl bridges to a central 2,2′‐biphenyl unit, in which the two rings are connected by a polyether strand. The torsion angle between the two rings of the biphenyl unit is 113.25 (17)°. The crown ether ring is flexible and capable of complexing metal cations, and the two terpy units may be reorganized from their observed trans ‐ trans configuration to act as terdentate ligands for transition metal ions.