Work

Synthesis, Characterization, and Reactivity of “NONO” Calix[4]arene Zirconium Complexes

Year: 2026

Type: article

Abstract: A series of zirconium(IV) complexes with a bis(benzylamino)-p-tert-butylcalix[4]arene ligand, LZrX2, were synthesized and structurally characterized via single-crystal X-ray diffraction and NMR. The obtained complexes proved to be unexpectedly susceptible to protonation because of the low acidity of the ligand. A high flexibility of the calix[4]arene ligand allowed either distorted-octahedral coordination or coordination numbers greater than 6. Complexes with different ancillary ligands X showed modest activity and poor stereocontrol toward rac-lactide polymerization and proved to be unstable under polymerization conditions.

Source: Organometallics

DOI: 10.1021/acs.organomet.6c00175

Authors: Matteo Cardoso, Frank Schaper

Institution: Université de Montréal

Language: English

Topic: Organometallic Complex Synthesis and Catalysis

Subfield: Organic Chemistry

Field: Chemistry

Domain: Physical Sciences

Open Access status: green

Funders: Natural Sciences and Engineering Research Council of Canada, Fonds de recherche du Québec – Nature et technologies

Awards: Reaction mechanisms of catalytic reactions using earth-abundant metals, G930102279