Abstract
AbstractThe reduction of 2‐[(2,6‐diisopropylphenyl)imino]acenaphthen‐1‐one (dpp‐MIAN) with metallic calcium in THF affords tetrameric [(dpp‐MIAN)Ca(THF)]4 (1). A further addition of dpp‐MIAN to complex 1 leads to the formation of paramagnetic species [(dpp‐MIAN)3Ca]2Ca (2). Both complexes were characterized by X‐ray diffraction. Complex 1 is active towards phenylacetylene and acetylene at temperatures above 80 °C. As a result, cycloaddition products are formed. Their hydrolysis results in a release of the dpp‐MIAN ligand with an attached phenylethynyl or ethynyl moiety to the carbonyl C atom. Complexes 1 and 2 demonstrate catalytic activity in the polymerization of L‐lactide both in solution and in bulk.
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