Abstract: The peri-diacetylenes, 1, 8-bi~(phenylethynyl) naphthalene (I) and 1, 8-bis (1- alkyny1) naphthalenes (IIa-c), have been prepared from 1 &diiodonaphthalene (111) and appropriate cuprous acetylides in pyridine. The ultraviolet absorption maxima of I are at slightly longer wavelengths than those of 1, 5-bis (phenylethynyl) naphthalene (IV). The moderate nmr shielding and the absorption in I indicate that its phenyl groups may be ...
