Efficient hydrosilylation of carbonyls by zinc alkyl complexes supported by flexible amidophosphinochalcogenide ligands

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Abstract
In this report, we describe the synthesis and structural characterization of two zinc alkyl complexes supported by anionic PN-morpholine ligand moieties with the general formula [κ2-{Ph2P(X)N-(CH2)2N(CH2CH2)2O}Zn(C2H5)]2 [X = Se (2a); S (2b)]. Both zinc complexes were fully characterized by 1H, 13C{1H}, and 31P{1H} NMR spectroscopy, and single-crystal X-ray diffraction analysis was performed to determine their molecular structures in the solid state. Complexes 2a and 2b have dimeric structures comprising an eight-membered intermolecular-metalacyclic ring adopting the most stable chair form. Furthermore, zinc complex 2a demonstrated exceptional catalytic activity for hydrosilylation of a wide range of aldehydes and ketones under mild reaction conditions. Hydrosilylated derivatives were confirmed by 1H and 13C{1H} NMR spectroscopy.
Funding Information
  • Anusandhan National Research Foundation (CRG/2022/001941)

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