# Harnessing the (CH3)2ZnCl– Anion for Dimethylzinc Stabilization as a Pathway to Stable Dimethylzinc Salts and Dimethylzinc Recovery

## TL;DR

This paper shows how to stabilize reactive dimethylzinc using a two-step process involving a Cl– ion and a metal cation, enabling its recovery and use.

## Contribution

A novel method for stabilizing dimethylzinc via ionic salt formation using (CH3)2ZnCl– and metal cations is proposed.

## Key findings

- Attachment of Cl– to dimethylzinc is thermodynamically favorable with a Gibbs free energy of −22.88 kcal/mol.
- The (CH3)2ZnCl– anion is strongly bound with an electron binding energy of 4.306 eV.
- Ionic salts (CH3)2ZnClLi and (CH3)2ZnClNa are stable and allow regeneration of pure dimethylzinc.

## Abstract

The possibility of
stabilizing reactive dimethylzinc through salt
formation has been investigated using advanced ab initio electronic structure methods and flexible basis sets. It was found
that the attachment of a Cl– ion to dimethylzinc
is thermodynamically favorable (with a Gibbs free reaction energy
of −22.88 kcal/mol at room temperature), occurring without
a kinetic barrier. The resulting anion is strongly electronically
bound, with an excess electron binding energy of 4.306 eV. The subsequent
attachment of Li+ or Na+ ions to this anion
leads to the formation of ionic salts (CH3)2ZnClLi or (CH3)2ZnClNa. These salts, formed
through this two-step process, are thermodynamically stable and represent
stabilized forms of dimethylzinc, from which the pure dimethylzinc
compound can be regenerated via the procedures suggested in this work.
In addition to the structural characterization of these systems and
a detailed analysis of the electronic structure of the (CH3)2ZnCl– anion, which plays a key role
in the described process, experimental approaches for realizing each
transformation are also proposed.