Abstract
Two manganese(II) phosphonate complexes, Mn 2( t-BuPO 3H) 4(bipy) 2 1 (bipy = 2,2′-bipyridine) and [Mn(H 2O) 6][ t-BuPO 3H] 2·6H 2O 2 have been synthesized with identical procedure from similar system containing tert-butylphosphonic acid and bipy ligands in different ratio at different temperature. The complexes have been characterized by single crystal X-ray diffraction, IR spectroscopy, X-ray powder diffraction, magnetic measurement and thermal analysis. Compound 1 crystallizes in the triclinic space group P-1 with C 2 v symmetry, and exhibits infinite double-chains linked by hydrogen bonds and the double-chains are further packed into two-dimensional network via the π–π stacking interactions, whereas compound 2 crystallizes in a monoclinic space group P 2(1)/ c, and the mononuclear molecules in 2 are linked by hydrogen bonds to form sandwich-like two-dimensional formation. The magnetic measurement reveals weak antiferromagnetic exchange interactions between the manganese(II) ions in compound 1.
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