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Hydrothermal Synthesis and Structure of a Dinuclear Molybdenum(III) Hydroxy Squarate With a Mo-Mo Bond

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

ACS Omega. 2020 Feb 28;5(9):4668-4672.

PMID: 32175513

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.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP14221068	Molybdenum(II) acetate dimer		14221-06-8	Price

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