Hydrothermal synthesis and structure of a dinuclear molybdenum(iii) hydroxy squarate with a mo-mo bond

Greg D. Barber, Christy George, Kathryn Hogg, Shae T. Johnstone, Carlos N. Pacheco, Hemant P. Yennawar, William G. Van Der Sluys

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Abstract

The reaction of molybdenum(II) and chromium(II) acetates with squaric acid in degassed and deionized water under hydrothermal conditions at 150 °C is described. The products have been formulated as M2(μ-OH)2(μ-C4O4)2(H2O)4·2H2O, where M = Cr (1) and Mo (2), based on combustion elemental analysis, infrared spectroscopy, magic angle spinning (MAS) solid-state carbon-13 nuclear magnetic resonance (NMR), and single-crystal X-ray diffraction. The edge-shared bioctahedral structures involve doubly bridging hydroxide ligands and μ-squarate ligands. The chromium compound lacks a direct metal-metal-bonding interaction, while in contrast the molybdenum compound contains a Mo-Mo bond [2.491(2) Å]. The nature of the Mo-Mo-bonding interaction is compared with that of other similar d3-d3 dimers.

Original languageEnglish (US)
Pages (from-to)4668-4672
Number of pages5
JournalACS Omega
Volume5
Issue number9
DOIs
StatePublished - Mar 10 2020

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All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

Barber, G. D., George, C., Hogg, K., Johnstone, S. T., Pacheco, C. N., Yennawar, H. P., & Van Der Sluys, W. G. (2020). Hydrothermal synthesis and structure of a dinuclear molybdenum(iii) hydroxy squarate with a mo-mo bond. ACS Omega, 5(9), 4668-4672. https://doi.org/10.1021/acsomega.0c00083