Synthesis, thermal, spectroscopic and structural properties of di(aqua)bis(N, N′-dimethylethylenediamine-κ ² N, N′)copper(II) acesulfamate

Abstract

Acesulfamate / N,N 0 -dimethylethylenediamine / Mass spectrometry / Thermal analysis / Single crystal structure analysis / X-ray diffractionAbstract. The complex [Cu(C 4 H 12 N 2 ) 2 (H 2 O) 2 ] 2þ [(C 4 H 4 NO 4 S) À ] 2 , which is the first structurally characterized complex with acesulfamate as the counter anion, has been synthesized and characterized by elemental analyses, magnetic and conductivity measurements, UV/vis, FT-IR and mass spectra. The thermal behaviour of the complexes was studied by simultaneous TG, DTG and DTA methods in a static air atmosphere. In the crystal structure, the copper cation, lying on a crystallographic centre of symmetry, adopts an elongated octahedral trans-[CuN 4 O 2 ] coordination geometry, with long axial Cu--O(aqua) bond length and short equatorial Cu--N bonds, of 2.479(2), 2.035(2) and 2.051(2) A, respectively. The coordinated water molecules together with the amine part of the dimethylethylenediamine molecule link the acesulfamate ions to the metal complex via intermolecular hydrogen bonds.

Experimental and DFT Studies on Poly[di-μ3-acesulfamato-O,O:O′;O′:O,O-di-μ-acesulfamato-O,O; N-di-μ-aqua-dicalcium(II)] Complex

“…Since one C=O bond is present in the asymmetric unit, one stretching vibration belonging to this bond occurs at 1,550.58 cm -1 (theoretical). A similar C=O stretching mode at 1,658 cm -1 was found for [Cu(H 2 O) 2 (dmen) 2 ](acs) 2 [45].…”

trans-Bis(ethylenediamine-κ2N,N′)bis(6-methyl-2,2,4-trioxo-3,4-dihydro-1,2λ6,3-oxathiazin-3-ido-κN)copper(II)

“…The crystal structures of acesulfame and its metal complexes have been reported previously (Beck et al, 1985;Bulut et al, 2005;Cavicchioli et al, 2010;İçbudak et al, 2005a;İçbudak et al, 2006;İçbudak et al, 2007b;Şahin et al, 2009;Şahin et al, 2010;Velaga et al, 2010). Furthermore, NMR (Beck et al, 1985), electronic (İçbudak et al, 2006; İçbudak et al, 2007a; İçbudak et al, 2007b), IR (Beck et al, 1985;İçbudak et al, 2006;İçbudak et al, 2007a;İçbudak et al, 2007b), mass (İçbudak et al 2005b) spectroscopies, thermal analysis (İçbudak et al, 2005b; İçbudak et al, 2006; İçbudak et al, 2007a; İçbudak et al, 2007b), magnetic susceptibility (İçbudak et al, 2006; İçbudak et al, 2007a), conductivity (İçbudak et al, 2007b) studies have been performed on the metal complexes of acesulme. In addition, the stability belong to different form of the acesulfame have being studied (Velaga et al, 2010).…”

“…In the crystal structure, Cu 2+ ion is six-coordination by six N atoms from two ethylenediamine and two acesulfamato ligands in a octahedron coordination geometry. Similarly, the Cu 2+ complexes in literature had been reported in octahedron coordination geometry (Bulut et al, 2005;İçbudak et al, 2007b;Pariya et al, 1998a;Pariya et al, 1998b;Şahin et al, 2010). The bond distances between Cu 2+ and N atoms for the Cu1-N1, Cu1-N2 and Cu1-N3 were found as 2.7432 (15) Å, 2.0091 (15) Å and 2.0103 (14) Å, respectively.…”

Structural and spectroscopic characterization of isotypic sodium, rubidium and cesium acesulfamates

“…[5]). The acesulfamate anion presents different potential coordination sites: the iminic nitrogen, the carbonylic oxygen and the two sulfonyl oxygen atoms, and it can act as a monodentate, bidentate or bridging ligand, in the same way as saccharinate, as demonstrated by a number of acesulfamato metal complexes reported during the last years [6][7][8][9][10][11][12][13][14].…”