The new orotate complex of cadmium(II) with quinoxaline, mer-[Cd(HOr)(H 2 O) 3 (QX)]·2H 2 O, was synthesized and characterized by elemental analysis, FTϪIR spectroscopy, thermal analysis and single crystal XϪray diffraction techniques. The complex crystallizes in the triclinic system, space group P1. The Cd 2ϩ ion exhibits a distorted octahedral coordination by one bidentate orotate, one monodentate quinoxaline and three aqua ligands. The uncoordinated water molecules link the orotate, quinoxaline and 1731 aqua ligands via OϪH···O, OϪH···N hydrogen bonds. Thus, an extensive network of hydrogen bonds stabilizes the crystal structure and form an infinitive three dimensional lattice. The decomposition reaction takes place in the temperature range 20Ϫ700°C in the static air atmosphere.
Scheme 1 Orotic acid (a), Quinoxaline (b)As a part of our going research, in this study, we describe the synthesis, spectral, thermal characterization and crystal structure of the mer-triaquaorotatoquinoxalinecadmium(II) dihydrate, mer-[Cd(HOr)(H 2 O) 3 QX]·2H 2 O (1).
A novel ZnII complex of the saccharinate ligand (sac) with tris‐hydroxymethylaminomethane (tham) was synthesized and characterized by elemental analysis, FT‐IR spectroscopy, simultaneous TG and DTA techniques, and X‐ray diffraction. The complex, [Zn(sac)(tham)2](sac), crystallizes in monoclinic system with space group P21/c [a = 7.55954(3) Å, b = 13.0532(6) Å, c = 27.7777(10) Å, β = 100.539(3)°, Z = 4]. The ZnII ion has a distorted octahedral coordination. The tham ligand has chemically different functions in the structure, acting as both bidentate and tridentate ligands. There are also sac moieties to act as N‐bonded ligand and as a counter anion. The molecular packing of the complex is provided by moderate hydrogen bonds as well as π···π interactions between the sac moieties. The IR spectra and the thermal decomposition of the complex are also discussed.
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