5,6,7,8,9,10,11,12,18,19,21,22-Dodecahydro-8,9:18,19-dibenzo-1,4,7-trioxa-11,16-diazacyclononadeca-10,16-diene

Abstract

The title compound, C 22 H 26 N 2 O 3 , is a 19-membered Schiff base crown ether ligand containing two imine-N and three etheral-O atoms. In the macrocyclic ring, the mean N...O distance is 6.248(3)A. The relative macrocyclic inner hole size, estimated as twice the mean distance of the donor atoms from their centroid is approximately 2.53 A. The mean C=N imine bond length [1.256(3) A] and C-N=C imine bond angle [117.8 (2)°] are smaller than the corresponding values in salicylaldimine and naphthaldimine Schiff base ligands.