Dichlorobis(2-hydroxymethyl-1-methylimidazole-N³)zinc(II)

Synthesis, Structures, and Magnetic Properties of Heteronuclear Cu(II)−Ln(III) (Ln = La, Gd, or Tb) Complexes

“…We recently used the chelating, pyridine-based ligand 2-(hydroxymethyl)-pyridine (Hhmp) and its imidazole-based analogue 2-hydroxymethyl-1-methyl-imidazole (Hmmi) (Chart ) as bridging ligands. Hhmp has already proven very useful in the synthesis of Mn clusters as SMMs, 7b,c while Hmmi was synthesized previously by our group . Under similar reaction conditions, we isolated dinuclear [CuLn(hmp) 2 (NO 3 ) 3 (H 2 O) 2 ] (Ln = Tb ( 1 ·Tb), Gd ( 1 ·Gd), or La ( 1 ·La)), and trinuclear [Cu 2 Tb(mmi) 4 (NO 3 )(H 2 O) 2 ](ClO 4 )(NO 3 )·2H 2 O (Ln = Tb ( 2 ·Tb) or Gd ( 2 ·Gd)) and [Cu 2 La(mmi) 4 (NO 3 ) 2 (H 2 O)](ClO 4 )·2H 2 O ( 2 ·La) by facile one-pot reactions and the synthesis, crystal structures, and magnetic properties are described herein.…”

Syntheses, Structures and Magnetic Properties of Dinuclear Copper(II)–Lanthanide(III) Complexes Bridged by 2‐Hydroxymethyl‐1‐methylimidazole

“…[12] The lanthanide(III) nitrates were converted from their oxides by nitric acid. Other reagents were commercially available and used as received.…”

“…Because the magnitude of magnetic interaction is exponentially dependent on the Cu-Gd distance, [11] and the distances of Cu II and Ln III bridged by µ-O,OЈ carboxylate groups are rather long; therefore, the search for other bridging ligands that may shorten the distance of the Cu-Ln bond is one of the important tasks in the synthesis of 3d-4f heteronuclear complexes. 2-Hydroxymethyl-1-methylimidazole (Hmmi) [12] is a mixed-atom donor ligand, which can chelate to a transition-metal ion through both the N and O atoms, whereas the O atom may further ligate to another metal ion. By treating Hmmi with Cu II , we synthesized a series of homometallic cupric complexes, including mononuclear, dinuclear and tetranuclear complexes, [13] and all of them exhibited chelation of both the N and O atoms of the mmi ligand to the copper ions.…”

Diiodobis(2‐hydroxymethyl‐1‐methyl‐1‐imidazole‐N3)cadmium(II)

“…In the course of metalloenzyme model studies, we have isolated a mononuclear complex Zn(Hmmi) 2 Cl 2 (Hmmi = 2-hydroxymethyl-1-methyl-imidazole), 1 in which only the N atom is coordinating to the central metal ion, while the O atom is free. Recent reports have shown that d 10 metals, such as Zn(II) and Cd(II) ions chelated by rigid aromatic groups, promise intriguing photoelectronic properties.…”