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Kyle G Pearce1, Samuel E Neale1, Claire L McMullin1

  • 1Department of Chemistry, University of Bath, Claverton Down, Bath, UK. kgp29@bath.ac.uk.

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The reaction of calcium hydride with zinc methyl affords a bimetallic complex. This complex then forms a calcium methyl derivative, [(BDI)CaMe]2, previously missing from this chemical series.

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Area of Science:

  • Organometallic chemistry
  • Coordination chemistry
  • Calcium and zinc chemistry

Background:

  • Dimeric β-diketiminato calcium hydride, [(BDI)CaH]2, is a known compound.
  • Alkylcalcium derivatives with β-diketiminato ligands are of interest.
  • The synthesis and reactivity of early transition metal complexes are actively studied.

Purpose of the Study:

  • To investigate the reaction of [(BDI)CaH]2 with ZnMe2.
  • To characterize the resulting bimetallic calcium zincate complex.
  • To explore the subsequent intramolecular reactions and product formation.

Main Methods:

  • Synthesis of bimetallic calcium zincate complex.
  • Characterization using spectroscopic techniques (NMR, X-ray crystallography).
  • Analysis of reaction pathways and mechanisms.

Main Results:

  • The reaction yielded the bimetallic complex [(BDI)Ca(μ-CH3)2Zn(μ-H)]2.
  • An intramolecular reaction led to the formation of [(BDI)CaMe]2.
  • [(BDI)CaMe]2 represents a missing member of the alkylcalcium derivative series.

Conclusions:

  • The study successfully synthesized and characterized a novel bimetallic calcium zincate complex.
  • An intramolecular rearrangement pathway was identified, leading to a previously unknown alkylcalcium species.
  • This work expands the understanding of β-diketiminato calcium chemistry and organometallic reactivity.