Synthesis, structural, spectral and EPR studies on the copper(II) complex of 5-(aminosulphonyl)-4-chloro-2-[(2-furanylmethyl)amino]benzoic acid (Furosemide)

Add time:08/07/2019    Source:sciencedirect.com

The copper(II) complexes of Furosemide (Fu) widely used as a diuretic were synthesized and isolated from aqueous and methanol solutions as CuFu2 · 2Solv and characterized by elemental analysis, single crystal X-ray diffraction, UV—vis and IR spectroscopy, EPR and magnetic susceptibility measurements. The complex CuFu2 · 2MeOH was isolated from methanol solutions as green crystals. Its structure consists of flattened molecules arranged in stacks. A centrosymmetric CuO6 elongated bipyramid is formed around copper(II) by four oxygens from the COO− groups and two from the MeOH. The COO− groups act as bridges between the copper(II) atoms with two oxygens in the equatorial plane (CuO distance of 1.924 Å) and the other two in apical positions at 2.720 Å. The methanol oxygens are at an intermediate distance of 1.941 Å. The CuCu separation is 4.749 Å. Hydrogen bonding occurs within and between the molecules.

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