25,27-(3,6,9-Trioxaundecane-1,11-di-oxy)-26,28-{3-[4-(tricyanoethylene)phenyl]-3-azapentane-1,5-dioxy}calix[4]arene di-chloro-methane monosolvate

摘要

The title compound, C 51 H 48 N 2 O 7 , was synthesized by the reaction of 25,27-(3,6,9-trioxaundecane-1,11-di-oxy)-26,28-(3-phen-yl)-3-aza-pentane-1,5-di-oxy)calix[4]arene with tetra-cyano-ethyl-ene in dry DMF. The compound has a 1,3-alternate conformation with an oxo-crown-5 unit and an aza-crown-3 unit with a nitro-gen atom connecting tri-cyano-ethyl-enephenyl group as a chromophore. Pairs of benzene rings of the calixarene are facing one another. Three of the four oxygen atoms connected to a benzene have endo -conformations while the other is exo . The oxo-crown-5 system has a t–g–g–t conformation. The di-chloro-methane solvent mol-ecule is linked to the main mol-ecule by a C—H?Cl hydrogen bond. In the crystal, C—H?O, C—H?Cl hydrogen bonds and C—H? π (ring) inter-actions are observed.