Abstract
The title complex salt,trans-anti-[CrBr2(Me2tn)2]ClO4(where Me2tn = 2,2-dimethylpropane-1,3-diamine, C5H14N2), was prepared and its structure determined by single-crystal X-ray diffraction at 100 K. The asymmetric unit contains three conformationally similar complex cations and three perchlorate anions. In each complex cation, the CrIIIcentre is coordinated by four N atoms of two chelating Me2tn ligands in the equatorial plane and by two Br atoms in atrans-axial arrangement, to give a distorted octahedral geometry. Interionic contacts are dominated by extensive hydrogen bonding, involving the NH groups of the Me2tn ligand as donors and the anion O atoms or coordinated Br atoms as acceptors, resulting in two-dimensional layers in thebcplane. Ligand field analysis based on the angular overlap model, and IR and electronic spectroscopic properties, are also discussed.
Publisher
International Union of Crystallography (IUCr)
Subject
Materials Chemistry,Inorganic Chemistry,Physical and Theoretical Chemistry,Condensed Matter Physics
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