ChemInform Abstract: KOMPLEXE VON 1‐VINYLAZOLEN MIT DEN CHLORIDEN DES MANGANS, EISENS, KOBALTS UND KUPFERS

Abstract

Bei der Umsetzung von l‐Vinylimidazol, 1‐Vinylbenzimidazol und l‐Vinylbenzotriazol mit den oben genannten Chloriden in alkoholischer oder aceto′ nischer Lösung entstehen metallhaltige Komplexe vom Donator‐Akzeptortyp, z.B. (I)‐(III).

Metal complexes with N-alkenylimidazoles: synthesis, structures, and biological activity

“…58 Reactions of 2 (2 pyridyl) 1 vinylbenzimidazole 28 with Co 2+ , Ni 2+ , Fe 3+ , Cu 2+ , Zn 2+ , and Cd 2+ chlorides yield high melting 1 : 1 complexes, regardless of the ratio of the starting reagents. 59 Potentiometric and spectroscop ic (NMR, 35 Cl NQR, UV, and IR) data suggest that these complexes in the crystalline state can form dimeric (29) or polymeric structures (30) with compound 28 as a bridging N,N bidentate ligand.…”

“…29 Room temperature syntheses of complexes of N vinyl imidazole with zinc salts (see Scheme 1, compounds 3d-f) 32 Based on the small shifts of the absorption bands in the IR spectra of metal complexes with N vinylimidazoles compared to those for free ligands, Kalmykov et al 40 have concluded that the coordination causes small changes in the imidazole ring. The lower intensities of the bands at 1640 and 1600 cm -1 are due to a reduced conjugation between the vinyl group and the heterocycle in the com plexes.…”

“…Complexes of N vinylimidazole (1) with mangan ese(II), 29 iron(III), 29 cobalt(II), 29,30 copper(II), 29 and nick el(II) chlorides 31 have been obtained by mixing the ligand and the salts at room temperature in organic solvents (eth anol, diethyl ether, or acetone) or water. The reactions of MnCl 2 , FeCl 3 , and NiCl 2 with vinylimidazole 1 give the complexes MCl m •4L (L = 1), regardless of the initial salt : ligand ratio (1 : 1, 1 : 4, or 1 : 6).…”

Microwave Spectrum and Conformational Composition of 1-Vinylimidazole

“…1-Vinylimidazole was chosen for study because it is an important chemical with a wide variety of uses, such as formation of polymers, , complexation with cations, − and formation of corrosion inhibitors . In this work, the focus is on the structural and conformational properties of free 1-vinylimidazole.…”