Microwave Synthesis, Crystal Structure and Magnetic Behavior of a Schiff Base Trinuclear Nickel Cluster

Abstract

The reaction of Ni(ClO 4 ) 2 · 6H 2 O with 2-hydroxybenzaldehyde and an aqueous solution of methylamine in acetonitrile/ MeOH under microwave irradiation and controlled temperature/ pressure leads to formation of trinuclear cluster [Ni 3 (mimp) 5 -(CH 3 CN)]ClO 4 (1; mimp ϭ 2-methyliminomethylphenolate anion)

Synthesis, crystal structure and magnetic properties of cubane and linear trinuclear nickel complexes formed by 3,5-dichloro-2-hydroxybenzylaminoacetic acid

“…The core of the complex 2 contains three Ni II ions arranged in a linear bridged by two l 2 -O [carboxyl group, Ni2ÀO1ÀNi1, 125.5(1)°] with NiÁÁÁNi separations of 3.724(2) Å. In comparison, the NiÁÁÁNi distances in 2 is 0.824 Å longer than the our previously reported triangle trinuclear Ni(II)-complex [Ni 3 (mimp) 5 (CH 3 CN)]ÁClO 4 (mimp = 2-methyliminomethylphenolate anion [6]) and is 0.284 Å longer than the previously reported linear trinuclear Ni(II)-complex [Ni 3 (ndc) 3 (pyridine) 4 ] (ndc = 2,6-naphthalenedicarboxylic acid) [20]. It is in line with the NiÀOÀNi angle.…”

“…In the past decade, the design and synthesis of the transition polymetallic clusters have undergone tremendous development owing to their fascinating structure and functional application as magnetic, electronic, optical, catalytic materials and fluorescent materials [1][2][3][4][5][6][7][8][9]. In general, the structural motifs of these hybrid compounds are closely related to the geometries of metal centers and the number of coordination sites provided by multidentate ligands.…”

Microwave-assisted synthesis, structure and property of a spin-glass heptanuclear nickel cluster with 2-iminomethyl-6-methoxy-phenol

“…The search for key ligands to suit respective needs is one of the most important processes to advance this research. Recently, Schiff base, as old ever green ligand, is widely used in the synthesis of magnetic clusters [4][5][6][7][8][9][10][11]. An effective and facile approach for the synthesis of such complexes is still the appropriate choice of well-designed organic ligands as bridges or terminal ligands with metal ions or metal clusters as nodes.…”

“…(2) The phenolic hydroxyl group also displays a variety of bonding geometries, such as μ 3 -O [7], μ 2 -O [8,[12][13][14][15][16][17], and μ-O. Recently, several heptanuclear clusters with 2-hydroxy-benzaldehyde ramification Schiff base have been reported [5,[12][13][14][15][16][17], but heptanuclear nickel cluster constructed by Himmp ligand has not been reported until today.…”

Durability of a PtSn Ethanol Oxidation Electrocatalyst

“…2‐Ethyliminomethyl‐6‐methoxy‐phenol (Hemmp) ligand has been explored to construct various structures with interesting magnetic properties for the following reasons: (1) The emmp anion contains two oxygen atoms of phenoxo, methoxy groups and one nitrogen atom of the ethyliminomethyl group, which may provide the potential to construct unpredictable and interesting polymetallic clusters. (2) The phenol hydroxyl group also displays a variety of bonding arrangements, such as μ 3 ‐O,7 μ 2 ‐O,8,12–17 and μ‐O. (3) The complexes, which are constructed by Hemmp ligands, are well isolated by ethyliminomethyl and methoxy groups.…”