A Bis‐Sulfonyl O, C, O Aryl Pincer Ligand and its Tin(II) Complex: Synthesis, Structural Studies, and DFT Calculations1. (27th November 2014)

• Record Type: Journal Article
• Authors: El Ezzi, Mohammad; Lenk, Romaric; Madec, David; Sotiropoulos, Jean‐Marc; Mallet‐Ladeira, Sonia; Castel, Annie
• Is Part Of: Angewandte Chemie. Volume 127:Number 3(2015)
• Page Start: 819
• Page End: 822
• Publication Date: 2014-11-27
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201406283
• Languages: English
• ISSNs: 0044-8249

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>The efficiency of the deprotonated aryl bis‐sulfone [2, 6‐{(<italic>p</italic>‐tolyl)SO₂}₂C₆H₃]⁻ as an O, C, O‐coordinating pincer‐type ligand was described. The bis‐sulfone precursor was synthesized using a straightforward palladium‐catalyzed cross‐coupling reaction. As a result of directed <italic>ortho</italic> metalation (DoM) through sulfonyl groups, a selective lithiation of the aryl group was achieved and the corresponding carbanion was isolated and its structure determined by single‐crystal X‐ray diffraction analysis. A heteroleptic tin(II) complex has been prepared by a nucleophilic substitution reaction. Crystallographic analysis and DFT calculations indicate that the bis‐sulfonyl moiety acts as a new O, C, O‐coordinating pincer‐type ligand with intramolecular SO coordination to a tin(II) center. The <italic>cis</italic> form with the two nonbonded oxygen atoms of the sulfonyl groups on the same side is preferentially obtained.</p> </abstract>