The Reductive Activation of CO₂ Across a Ti=Ti Double Bond: Synthetic, Structural, and Mechanistic Studies.

ABSTRACT: The reactivity of the bis(pentalene)dititanium double-sandwich compound Ti₂Pn^†₂ (1) (Pn^† = 1,4-{SiⁱPr₃}₂C₈H₄) with CO₂ is investigated in detail using spectroscopic, X-ray crystallographic, and computational studies. When the CO₂ reaction is performed at -78 °C, the 1:1 adduct 4 is formed, and low-temperature spectroscopic measurements are consistent with a CO₂ molecule bound symmetrically to the two Ti centers in a μ:η²,η² binding mode, a structure also indicated by theory. Upon warming to room temperature the coordinated CO₂ is quantitatively reduced over a period of minutes to give the bis(oxo)-bridged dimer

SUBMITTER: Kilpatrick AF 

PROVIDER: S-EPMC4623487 | biostudies-literature | 2015 Oct

REPOSITORIES: biostudies-literature