COBALT(II) AND NICKEL(II) COMPLEXES WITH 1-(2-CARBAMYLETHYL)-2-ALKYLIMIDAZOLES

• Type: Article in International Scientific Journal
• Date: 1995

Authors

BASTO, MCRMP (Author) FCUP; MACHADO, AASC (Author) Other

Journal

Title: Synthesis and Reactivity in Inorganic and Metal-Organic Chemistry

Vol. 25

Pages: 1101-1126

ISSN: 0094-5714

Publisher: Marcel Dekker Inc.

Indexing

ISI Web of Knowledge - 5 Citations

Scientific classification

FOS: Natural sciences > Chemical sciences

Other information

Authenticus ID: P-001-J1B

Abstract (EN): Cobalt(II) and nickel(II) complexes with 1-(2-carbamylethyl)-2-methylimidazole (CMIm) or 1-(2-carbamylethyl)-2-ethylimidazole (CEIm) and halides or pseudo-halides have been synthesized and characterized by magnetic and spectroscopic techniques. Eighteen compounds have been isolated: MX(2)L(2)(M = Co(II) or Ni(II); L = CMIm or CEIm and X = Cl-, Br- or SCN-), CoI(2)L(2) (L = CMIm or CEIm), [Co(CMIm)(4)]I-2.H2O, [Co(NCS)(2)(CMIm)(4)].H2O, Ni(NCS)(2)(CEIm)(4) and Ni(NCS)(2)(CMIm)(3). Cobalt(II) compounds are monomeric and pseudotetrahedral, except [Co(NCS)(2)(CMIm)(4)].H2O that is pseudo-octahedral. Among the nickel(II) complexes, Ni(NCS)(2)(CEIm)(4), NiBr2(CMIm)(2) and NiX(2)(CEIm)(2) (X = Cl- or Br-) are monomeric (and pseudo-tetrahedral except the first that is pseudo-octahedral). The remaining nickel(II) complexes are believed to be polymeric. Weak magnetic interactions may occur in these complexes. The relative order of the ligand field strength (10 Dq) for the ligands in complexes seems to be: CIm greater than or equal to CMIm > CEIm (CIm = 1-(2-carbamylethyl)imidazole).

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 26