Bonding and Electron Delocalization in Ruthenium(III) σ-Arylacetylide Radicals [ trans -Cl(η 2 -dppe) 2 RuC≡C(4-C 6 H 4 X)] + (X = NO 2 , C(O)H, C(O)Me, F, H, OMe, NMe 2 ): Misleading Aspects of the ESR Anisotropy.

Abstract

The bonding within the series of [trans-Cl(η2-dppe) 2RuC≡C(4-C6H4X)]n+ complexes (1-Xn+; n = 1, 0 and X = NO2, C(O)H, C(O)Me, F, H, OMe, NMe2) has been examined by IR, ESR, and UV-vis-near-IR spectroscopy together with computational modeling. A strong