Reversible Uptake of CO<sub>2</sub> by Pincer Ligand Supported Dimetallynes
Alexa Caise, Liam P. Griffin, Caitilín McManus, Andreas Heilmann, Simon Aldridge
Abstract
Abstract We report on the reversible uptake of carbon dioxide by dimetallynes featuring ancillary hemi‐labile pincer ligands. Insertion into the Ge−Ge/Sn−Sn bonds yields species containing an E(CO 2 )E unit, with the mode of ligation of the CO 2 fragment determined crystallographically being found to be dependent on the identity of the Group 14 element. The thermodynamics of CO 2 uptake/loss can be established through VT NMR (Δ H °=+24.6(2.3) kJ mol −1 , Δ S °=+64.9(3.8) J mol −1 K −1 , Δ G ° 298 =+5.3(1.9) kJ mol −1 for the loss of CO 2 in the Ge case), and the chemical consequences of reversibility demonstrated by thermodynamically‐controlled exchange reactions.