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Synthesis and Structure of Tetrahedral [Zn(maltol)2Cl2], Exhibiting Monodentate Coordination of Neutral Maltol

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Abstract

Recrystallization of [Zn(malt)2(H2O)1.5] (malt = maltolato(-1), C6H5O3) from a concentrated aqueous solution acidified with HCl to pH 3.0 yielded colorless crystals of [Zn(Hmalt)2Cl2] (Hmalt = neutral maltol, C6H6O3). The Zn(II) site exhibits distorted tetrahedral coordination through bonding to two chloride ligands and to two neutral maltol ligands, each bonding through the ketonic oxygen. [Zn(Hmalt)2Cl2] is a unique example of a neutral monodentate coordination by the maltol ligand.

Graphical Abstract

A view of the tetrahedral [Zn(Hmalt)2Cl2] (Hmalt = neutral maltol, C6H6O3).

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Acknowledgements

The X-Ray diffractometer was purchased with funding from NSF MRI program grant CHE-1725028. RPD thanks Balchem Corporation, New Hampton, NY, USA for support used in part for this work. The work was funded in part through Distinguished Professor funding from Syracuse University College of Arts and Sciences to JZ.

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Authors and Affiliations

  1. Department of Chemistry, Syracuse University, Syracuse, NY, 13244, USA

    Derek R. Case, Jon Zubieta & Robert P. Doyle

  2. X-Ray Crystallographic Facility of the Department of Chemistry, University of Rochester, Rochester, NY, 14604, USA

    William W. Brennessel

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  1. Derek R. Case
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  2. William W. Brennessel
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Correspondence to Jon Zubieta or Robert P. Doyle.

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Case, D.R., Brennessel, W.W., Zubieta, J. et al. Synthesis and Structure of Tetrahedral [Zn(maltol)2Cl2], Exhibiting Monodentate Coordination of Neutral Maltol. J Chem Crystallogr 53, 177–183 (2023). https://doi.org/10.1007/s10870-022-00951-3

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