Acknowledgment. This work was supported in part by the Polymer Program, Division of Materials Research of the National Science Foundation, under Grant No. DMR-7723437, for which we are grateful. ... Molecular Organization by Hydrogen Bonding: Juxtaposition of Remote Double Bonds for Photocyclization in a 2-Pyridone Dimer ... Roger Adams Laboratory, University of Illinois, Urbana, Illinois 61801 ... Irradiation of the hydrogen bonded dimer of 3- [7-( ...