
%0 Journal Article
%A Duckworth, PA 
%A Lindoy, LF 
%A Mcpartlin, M 
%A Tasker, PA 
%T New Macrocyclic Ligands. IV. Dibenzo-Substituted Rings Incorporating Five Donor Atoms. X-Ray Structures of an N<sub>4</sub>O-Donor Macrocycle, Its Protonated Form, and Its Complex With Barium Perchlorate
%J Australian Journal of Chemistry
%D 1993/11/01
%V 46
%N 11
%P 1787-1797
%K 
%R https://doi.org/10.1071/CH9931787
%U https://www.publish.csiro.au/paper/CH9931787 
%X The syntheses and characterization of four dibenzo-substituted macrocycles incorporating N5-, N4O-or N4S-donor sets are reported. The new systems extend the range of related (potentially pentadentate ) macrocyclic systems of this general structure reported previously. For the 17-membered macrocycle incorporating an N4O-donor set, X-ray structure determinations of the free ligand and its salt of type [LH]ClO4 confirm the structure of this compound predicted from physical measurements. The diperchloratobarium complex of this macrocycle is shown to have the barium nine-coordinate; the coordination sphere is composed of the N4O-donors of the macrocycle and four oxygen atoms derived from a monodentate as well as a bidentate perchlorate group and an ethanol molecule. 
