Carbon-13 NMR spectroscopy of .alpha.,.omega.-diphenylpolyenyl anions. Confirmation of charge localization in soliton model compounds
作者:Laren M. Tolbert、Mark E. Ogle
DOI:10.1021/ja00197a076
日期:1989.7
ease of preparation as well as for their utility for estimating delocalization; that is, at what point does negative charge cease to delocalize into the aromatic rings The Dewar nonbonded molecular orbital (NBMO) formalism predicts, at the Hueckel level, even distribution of negative charge at the odd-numbered carbon atoms and zero charge (nodes) at the even carbons. In contrast, the SSH theory, a modified
electron‐donating auxiliary ligands for metal complexes, more extended π‐conjugated unsaturated hydrocarbon anions have rarely been used in coordination chemistry, despite their potential ability to serve as the multiply bridging π‐ligands for metal clusters. This work reports isolation of metal chain clusters bearing the multi‐dentate, open‐chain extended unsaturated hydrocarbon anion ligands. The extended open‐chain