A new N,N′-bidentate ligand, 2-(3-isobutoxyanilino)pyridlne (H iBuOap), was introduced and used as the ancillary ligand to support highly soluble diruthenium compounds. Thus, the new compounds Ru 2( iBuOap) 4CI (1), Ru 2 ( iBuOap) 4(C≡CPh) (2), Ru 2( iBuOap) 4(C≡CPh) 2 (3), and Ru 2( iBuOap) 4(C≡CSi iPr3) (4) were prepared and characterized by both voltammetric and spectroscopic methods, and their physical properties were found to be quite similar to those of the previously reported Ru 2(ap) 4-based compounds. The spectroscopic properties of both anionic and cationic derivatives of compounds 2 and 3 were examined with spectroelectrochemistry. Density functional theory calculations performed on model compounds of 2 and 3 provide an in-depth picture of the electronic structures of Ru 2(ap) 4-based alkynyl compounds and assignment of the observed electronic transitions.

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Persistent URL dx.doi.org/10.1021/ic9000973
Journal Inorganic Chemistry
Zhang, L. (Lei), Xi, B. (Bin), Liu, I.P.-C. (Isiah Po-Chun), Choudhuri, M.M.R., Crutchley, R, Updegraff, J.B. (James B.), … Ren, T. (Tong). (2009). Spectroscopy and electronic structures of Ru 2(ap) 4-alkynyl compounds. Inorganic Chemistry, 48(12), 5187–5194. doi:10.1021/ic9000973