Materials chemistry communications. Synthesis and optical spectroscopy of monomeric and polymeric cobalt σ-acetylide complexes

Abstract

Optical spectra of the complexes, trans-ClCoN₄CCC₆H₅, trans-CoN₄(CCC₆H₅)₂ and [graphic omitted]CoN₄CC-p-C₆H₄CC[graphic omitted]_n, (where N₄= 3,9-dimethyl-4,8-diazaundecane-2,10-dione dioxime) show absorptions associated with π-π* transitions of the acetylenic unit and indicate an extended π-electron conjugation through the metal sites on the chain in the polymeric complex.