A family of oxorhenium(v) complexes incorporating chelated monoanionic ONN reduced Schiff base and dianionic ONNO tetradentate ligands: synthesis, spectroscopic and electrochemical studies

Mondal, Amrita; Sarkar, Sounak; Chopra, Deepak; Row, Tayur N. Guru; Rajak, Kajal Krishna

doi:10.1039/b408316d

Cited by 30 publications

(18 citation statements)

References 35 publications

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“…The N 2 O 2 ligands, H 2 L 1 and H 2 L 2 (general abbreviation H 2 L) used in the present work were synthesized using the reported procedure [13]. …”

Section: Resultsmentioning

confidence: 99%

Binuclear cobalt(II/II) and cobalt(II/III) chelates with O2N2 ligands: synthesis, structure and magnetic studies

Singh

Banerjee

Gordon

et al. 2009

Transition Met Chem

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The title complexes ½Co II 2 L 1 2 and ½Co II Co IIIðOAc)L 2 2 have been synthesized in excellent yields by reacting Co(OAc) 2 Á4H 2 O with H 2 L 1 and H 2 L 2 , respectively, in acetonitrile solution. Here, [L 1 ] 2-and [L 2 ] 2-are the deprotonated forms of N,N-bis(2-hydroxybenzyl)-N 0 ,N 0 -dimethylethylenediamine and N,N-bis(2-hydroxybenzyl)-2-picolylamine, respectively. The crystal structures of ½Co II 2 L 1 2 and ½Co II Co III ðOAc)L 2 2 ÁH 2 OÁCH 2 Cl 2 were determined by x-ray crystallography. In ½Co II 2 L 1 2 , each cobalt atom has distorted trigonal bipyramid geometry, while in ½Co II Co III ðOAc)L 2 2 , each cobalt atom has distorted octahedral geometry. Variable temperature magnetic moment measurements show weak antiferromagnetic interaction in ½Co II 2 L 1 2 . The magnetic characterization for ½Co II Co III ðOAc)L 2 2 is in agreement with the presence of Co(II) and Co(III) centers.

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“…The N 2 O 2 ligands, H 2 L 1 and H 2 L 2 (general abbreviation H 2 L) used in the present work were synthesized using the reported procedure [13]. …”

Section: Resultsmentioning

confidence: 99%

Binuclear cobalt(II/II) and cobalt(II/III) chelates with O2N2 ligands: synthesis, structure and magnetic studies

Singh

Banerjee

Gordon

et al. 2009

Transition Met Chem

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“…The electrochemical study of this complex showed a one-electron equivalent oxidation of Re(V) to Re(VI) ( Table 3), and a quasi-reversible voltammogram (Fig. 2) assignable to the ReO(V)/ReO(VI) couple was obtained at 1.28 V (versus SCE) [13,28] based on the magnitude of the diffusion coefficient of 4.7 9 10 6 cm 2 s -1 calculated from the CV responses at different scan rates (50-400 mV). No cathodic response consistent with ReO(V) ?…”

Section: Electrochemistrymentioning

confidence: 99%

A selenium-bonded oxorhenium(V) complex: solvothermal synthesis, structural characterization, and electrochemical behavior

Das

Chakraborty

Sarkar

et al. 2011

Transition Met Chem

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The solvothermal reaction of [ReOCl 3 (PPh 3 ) 2 ] with 2,2 0 -seleno-bis(4,6-di-tert-butylphenol) (H 2 L 1 ) in ethanol at 95°C resulted in an oxorhenium(V) complex of formulation [ReO(L 1 )(L 2 )] due to the in situ formation of 2-selenochloromethyl-4,6-di-tert-butylphenolate (L 2 ) through the cleavage of one C-Se bond of H 2 L 1 . The mononuclear oxorhenium(V) complex was characterized by physicochemical and spectroscopic methods along with detailed structural analysis by single crystal X-ray crystallography. Electrochemical studies revealed a one-electron equivalent quasi-reversible voltammogram for the ReO(V)/ ReO(VI) redox couple at 1.28 V (versus SCE) with no cathodic response for ReO(V) ? ReO(IV) reduction.

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“…2 6 ]·(ClO 4 ) 2 have been reported. 1 One of the tetradentate ligands that have pyridine, amine, and hydroxyl groups is N-(2-pyridylmethyl)iminodiethanol (H 2 pmide), an asymmetrical tripodal N 2 O 2 -type ligand.…”

Section: Introductionmentioning

confidence: 99%

“…For example, [Re V O( pmide)Cl] and [VO 2 (Hpmide)] were prepared as monomeric complexes and characterized by various spectroscopic methods. Herein, we report the synthesis, crystal structure, and magnetic properties of oxygen-bridged dicopper(II) and tricobalt(II/III) complexes, 2 (1) and [( pmide) 2 -Co 3 (CH 3 CO 2 ) 2 (NCS) 2 ]·4CH 3 OH (2), respectively (Scheme 1). 4,5 The former as a trimer is composed of two terminal subunits, {Ni(Hpmide)} + and a central nickel(II) cation.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, structure, and magnetic properties of dicopper and tricobalt complexes based on N-(2-pyridylmethyl)iminodiethanol

Shin

Jeong

Hayami

et al. 2015

Inorg. Chem. Front.

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4CH 3 OH (2) coordination complexes have been prepared by the reaction of the tetradentate H 2 pmide ligand and Cu(NO 3 ) 2 ·3H 2 O or Co(CH 3 CO 2 ) 2 ·4H 2 O/NaNCS in organic solvent (H 2 pmide = N-(2-pyridylmethyl)iminodiethanol). In 1, one copper(II) ion is bonded with a H 2 pmide, and the other is coordinated with a mono-deprotonated Hpmide − . The copper(II) ions are linked through an ethoxo group of the Hpmide − ligand and two oxygen atoms of a nitrate ion, resulting in an asymmetric dinuclear structure. In 2, two terminal cobalt(III) units are coordinated with pmide 2− , NCS − , and CH 3 CO 2 − . The terminal units are each connected to a central cobalt(II) cation through the two oxygen atoms of pmide 2− and one bridged acetate ion, giving rise to a mixed-valence trinuclear cobalt complex formulated as Co III -Co II -Co III . Complex 1 shows a strong antiferromagnetic interaction through the ethoxo and nitrato groups between the copper(II) ions [g = 2.070, J = -88.1 cm −1 (-61.2 K)]. However, complex 2 behaves as a paramagnetic cobalt(II) monomer, due to the diamagnetic cobalt(III) ions in the terminal units [g = 2.526, |D| = 51.8 cm −1 (36.0 K)]. † CCDC 1402754 and 1402755. For crystallographic data in CIF or other electronic format see

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A family of oxorhenium(v) complexes incorporating chelated monoanionic ONN reduced Schiff base and dianionic ONNO tetradentate ligands: synthesis, spectroscopic and electrochemical studies

Cited by 30 publications

References 35 publications

Binuclear cobalt(II/II) and cobalt(II/III) chelates with O2N2 ligands: synthesis, structure and magnetic studies

Binuclear cobalt(II/II) and cobalt(II/III) chelates with O2N2 ligands: synthesis, structure and magnetic studies

A selenium-bonded oxorhenium(V) complex: solvothermal synthesis, structural characterization, and electrochemical behavior

Synthesis, structure, and magnetic properties of dicopper and tricobalt complexes based on N-(2-pyridylmethyl)iminodiethanol

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