Nickel(II) and copper(II) complexes with Schiff base ligands containing remote substituents

Abstract

The preparations of a series of nickel(II) and copper(II) complexes containing tridentate and tetradentate Schiff base ligands are reported. Some solid and solution characterization studies are included.

TiIV Complexes of Redox‐Active Schiff Bases

“…Elemental analyses were performed with weighing under N 2 at Guelph Chemical Laboratories (Guelph, ON, Canada) and ANALEST Laboratories (Toronto, ON, Canada). H 2 I, [11] H 2 IV [12,13] and H 2 VII [14] were prepared by published procedures. H 2 II [12] was prepared by the same procedure used for H 2 I.…”

“…H 2 I, [11] H 2 IV [12,13] and H 2 VII [14] were prepared by published procedures. H 2 II [12] was prepared by the same procedure used for H 2 I. [11] NMR spectroscopic data for these are www.eurjic.orgpresented as Supporting Information.…”

“…Of these seven, five have been described previously, but detailed procedures were available only for H 2 I, [11] H 2 II, [12] H 2 IV [12,13] and H 2 VII. [14] The synthesis of H 2 V [15] has been claimed, but no procedure, spectroscopic data or elemental analysis have been reported; yields and NMR spectroscopic data for H 2 II and H 2 IV were also lacking.…”

“…H 2 VI is also new, although the methyl analogue has been reported, [16] and it was selected to possibly accommodate two Ti centres. All of the ligands were prepared by the condensation of substituted salicylaldehydes with 2-aminothiophenol, and it has long been recognized [11,12,15,17,18] that these reactions can lead to three products, which depends on the reaction conditions, that have been identified mainly based on IR and elemental analyses as the anil (A), thiazoline (B), or thiazole (C) forms (Scheme 4).…”

Electrosynthesis of coordination compounds by the dissolution of metal anodes using ligand precursors

“…The mechanism, however, has not been explained. The complex derived from salicylaldehyde was shown to be identical with that prepared by conventional routes (Muto 1960;Ison and Kokot 1970;Fee et al 1973;Addison et al 1984). The introduction of nitrogenous Lewis bases into the electrochemical cell gave the adducts CuL.L' (where L'= pyridine, 2,2'-bipyridine and 1,10-phenanthroline).…”