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Synthetic and Structural Studies of Ethyl Zinc β-Amidoenoates and β-Ketoiminates

Authors
  • bhide, malavika a.
  • manzi, joe a.
  • knapp, caroline e.
  • carmalt, claire j.
Publication Date
May 25, 2021
Identifiers
DOI: 10.3390/molecules26113165
OAI: oai:mdpi.com:/1420-3049/26/11/3165/
Source
MDPI
Keywords
Language
English
License
Green
External links

Abstract

A set of heteroleptic ethyl zinc β-amidoenoates (1, 2) and β-ketoiminates (3) of the form [LZnEt]2 with varying steric bulk have been synthesised via the reaction of diethylzinc with β-aminoenoate ligands HL1 and HL2 and β-ketoimine HL3. These complexes have been characterised via 1H and 13C NMR, mass spectrometry and single-crystal X-ray diffraction, which unambiguously determined all three structures as dimeric species in the solid state. We observe the unusual dimerisation of 1 and 2 through coordination of the central zinc atom to the methine carbon of the second monomer, which gives these complexes high reactivity. The thermal properties of complex 3 are explored via thermal gravimetric analysis (TGA), to investigate their potential as single-source precursors to zinc oxide, which shows that 3 has a significantly lower decomposition temperature as compared to its bis-ligated counterpart [Zn(L3)2], which gives 3 promise as a single-source precursor to zinc oxide.

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