“…The residue was chromatographed on Al 2 O 3 (gradient elution with C 6 H 6 -MeCN from 10 : 1 to 4 : 1). This procedure was used to obtain 2 [2 (2,3,5,6,8,9,11,12,14,15 decahydrobenzo [1,7,10,16,4,13]tetraoxadithiacyclooctadecin 18 yl)ethenyl] 9 methyl 1,10 phenanthroline (3a), 2 {2 [4 (1,4 dioxa 7,13 dithia 10 azacyclopentadecan 10 yl)phenyl]ethenyl} 9 methyl 1,10 phenanthroline (3c), and 2,9 bis{2 [4 (1,4 dioxa 7,13 dithia 10 azacyclopentadecan 10 yl)phenyl]ethenyl} 1,10 phenanthroline (4c). For the yields of the products, see Table 1.…”