| Abstract
| - A series of 12 bridging ligands was prepared. These ligands include a central linker appended to two1,8-naphthyrid-2-yl or two 1,10-phenanthrolin-2-yl units. The linkers include pyridazin-3,6-diyl, 1,8-naphthyrid-2,7-diyl, 2,2‘-bipyrid-6,6‘-diyl, 1,10-phenanthrolin-2,9-diyl, 1,2-di(2‘-pyrid-6‘-yl)ethyne, and3,6-di(2‘-pyrid-6‘-yl)pyridazine. The ligands were synthesized from the diacetyl derivative of the centrallinker by a Friedländer condensation with either 2-aminonicotinaldehyde or 8-amino-7-quinolinecarbaldehyde. The precursor diacetyl derivatives were, in turn, prepared by pathways involving Stille andSonogashira couplings. Examination of the electronic absorption spectra of the bridging ligands showsthe strongest correlation to be between pairs of ligands having the same central linker. Complexationstudies will follow.
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