Abstract
Dissolution of FeBr3 in a mixture of acetonitrile and 3,4-lutidine in the presence of an amine results in the formation of an [Fe30] molecular metal oxide containing alternating layers of tetrahedral and octahedral FeIII ions. Mass spectrometry suggests the cluster is formed quickly and remains stable in solution, while magnetic measurements and DFT calculations reveal competing antiferromagnetic exchange interactions.
Highlights
Dissolution of FeBr3 in a mixture of acetonitrile and 3,4-lutidine in the presence of an amine results in the formation of an [Fe30] molecular metal oxide containing alternating layers of tetrahedral and octahedral FeIII ions
The wet pyridine acts as a solvent, a source of H2O (O2À, OHÀ), base, ligand, and cation
Further manual examination revealed that the dissolution of FeBr3 in a 3,4-lutidine/acetonitrile solution, in the presence of hexamethylenetetramine (HMTA) results in the formation of[FeI3I0I(m4-O)6(m3-O)26(m-OH)15Br9(lut)15]Br3 (1, Fig. 1 and Table S1, Electronic supplementary information (ESI)†)
Summary
Brechin et al An [Fe3III0] molecular metal oxide Dissolution of FeBr3 in a mixture of acetonitrile and 3,4-lutidine in the presence of an amine results in the formation of an [Fe30] molecular metal oxide containing alternating layers of tetrahedral and octahedral FeIII ions. Mass spectrometry suggests the cluster is formed quickly and remains stable in solution, while magnetic measurements and DFT calculations reveal competing antiferromagnetic exchange interactions.
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