( n ‐Bu 2 Sn) 2 O(CO 3 ): An active, robust and recyclable organotin(IV) for the direct synthesis of linear organic carbonates from carbon dioxide and alcohols

Sreevardhan Reddy Sanapureddy , Laurent Plasseraud (1)

1 ICMUB - Institut de Chimie Moléculaire de l'Université de Bourgogne [Dijon]

Organotin(IV) compounds are known to promote the direct synthesis of organic carbonates from carbon dioxide and alcohols. In the past, structural studies have highlighted that the carbonato moiety is a recurring ligand of tin species collected during the CO2 pressurized reactions. In a mimetic approach and in order to achieve an available and recyclable precursor, the title compound, (n-Bu2Sn)2O(CO3) (1) was prepared in a single step by reacting commercial din -butyltin dichloride with an aqueous solution of sodium carbonate. 1 was characterized by infrared spectroscopy, thermogravimetric and elemental analysis. Multinuclear NMR investigations in solution were also conducted. 1 was then evaluated for the direct carbonation of alcohols (methanol, ethanol, n-butanol and isopropanol) under CO2 pressure. Recycling experiments were performed showing the efficient reuse of 1 without loss of activity. Furthermore the infrared fingerprint of 1 was preserved even after several runs demonstrating a good stability. The effects of pressure and of reaction time on the DMC formation were also studied.

Mots clés: Carbon dioxide utilization; Alcohols conversion; Linear organic carbonates; Diorganotin(IV); Carbonato complex

Domaines: Chimie; Chimie de coordination

Sreevardhan Reddy Sanapureddy, Laurent Plasseraud. ( n ‐Bu 2 Sn) 2 O(CO 3 ): An active, robust and recyclable organotin(IV) for the direct synthesis of linear organic carbonates from carbon dioxide and alcohols. Applied Organometallic Chemistry, 2017, 31 (11), ⟨10.1002/aoc.3807⟩. ⟨hal-03547388⟩