Synthesis and Crystal Structures of Dinuclear Cobalt(III) Complexes with 1,3-Bis(5-nitrosalicylideneamino)-2-propanol and 1,3-Bis(3-nitrosalicylideneamino)-2-propanol

Crystal Structure of a Hydrolyzed Product of the Cobalt(III) Complex with 1-(3,5-Dichlorosalicylideneamino)-3-amino-2-propanol

“…The spectra are similar to those of the dinuclear octahedral cobalt(III) complexes with 1,3-bis(3nitrosalicylideneamino)-2-propanolato and 1,3-bis(5-nitrosalicylidene amino)-2-propanolato ligands. 12 The infrared spectra of H3bdcsalpr (Fig. 5) shows the absence of νasNH2 and νsNH2 bands expected to appear at ∼3560 and ∼3400 cm -1 , respectively, 16 excluding the possibility of hydrolyzation of the Schiff-base ligand before the reaction with the metal ion.…”

“…In the crystals, these Schiff-base ligands have intramolecular hydrogen bonds between imino-nitrogen and phenolato-oxygen atoms and intermolecular hydrogen bonds between an alcohol-oxygen atom and a phenolato-oxygen atom of neighboring Schiff-base molecule. [1][2][3][4][5] The reaction between these Schiff-base ligands and metal salts generates mononuclear copper(II), 6 tetranuclear zinc(II) 7 complexes with a tetradentate O, N, N, O-chelate, and dinuclear copper(II), 8 nickel(II), 9 manganese(III), 10,11 and cobalt(III) 12 , and tetranuclear manganese(II,III) 13,14 complexes with a tridentate O, N, O-chelate. Aiming at extending these systems, we decided to prepare a cobalt complex with 1,3-bis(3,5-dichlorosalicylideneamino)-2-propanol (H3bdcsalpr), which has not been reported so far.…”

“…1, is different from the expected dinuclear cobalt complexes that we prepared before. 12 A Schiff-base ligand, H3bdcsalpr, was synthesized by a similar method to the previously reported one. 5 1,3-Diamino-2propanol (0.703 g, 7.8 mmol) and 3,5-dichlorosalicylaldehyde (3.00 g, 15.7 mmol) were dissolved in methanol (70 cm 3 ).…”

Crystal Structure of 1,3-Bis(3,5-dibromosalicylideneamino)-2-propanol

“…Schiff-base molecules, 1,3-bis(salicylideneamino)-2-propanol (H3salpr), and their substituted derivatives, are potential pentadentate ligands with two phenolato-oxygen, two iminonitrogen, and one central alcoholate-oxygen donor atoms by deprotonation with coordination to metal atoms. It is known that these Schiff-base ligands form a mononuclear copper(II) complex as a tetradentate O, N, N, O-chelate, 1 and dinuclear copper(II), 2 nickel(II), 3 manganese(III), 4 and cobalt(III) 5 complexes as tridentate O, N, O-chelates. Previously, we reported on the crystal structures of a monosubstituted Schiffbase ligand, 1,3-bis(5-nitrosalicylideneamino)-2-propanol (H3nsalpr) 6 and a disubstituted Schiff-base ligand, 1,3-bis(5chloro-3-methoxysalicylideneamino)-2-propanol (H3cmsalpr).…”

Synthesis and Crystal Structure of 1,3-Bis(5-chloro-3-methoxysalicylideneamino)-2-propanol Trihydrate

“…These Schiff-base ligands worked as a dinucleating ligand for various metal ions, and afforded many metal complexes. For example, dinuclear copper(II), 1 nickel(II), 2 manganese(III), 3 and cobalt(III) 4 complexes with tridentate O,N,O-chelates as well as a mononuclear copper(II) complex with a tetradentate O,N,N,Ochelate 5 have been reported so far. Previously, we reported on the crystal structure of a related Schiff-base ligand, 1,3-bis(5nitrosalicylideneamino)-2-propanol (H3nsalpr), which has electron-withdrawing nitro groups at the salicyliedeneaminobenzene rings.…”