A family of mononuclear molybdenum-(vi), and -(iv) oxo complexes with a tridentate (ONO) ligand

Dinda, Rupam; Sengupta, Parbati; Ghosh, Saktiprosad; Mayer‐Figge, Heike; Sheldrick, William S.

doi:10.1039/b207129k

Cited by 112 publications

(44 citation statements)

References 34 publications

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“…Materials 2,6-Diacetylpyridine (dap) was commercially available (Aldrich) and was used without further purification. AH was prepared by the reaction of hydrazine with the corresponding methyl anthranilate using the published methods [12,13]. …”

Section: Methodsmentioning

confidence: 99%

Synthesis, characterization, and crystal structure of [Ni(dap(A)2)]2 (dap(AH)2: 2,6-diacetylpyridine bis(anthraniloyl hydrazone))—a molecule possessing an infinite double helical chain in the solid state

et al. 2007

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Anthraniloyl hydrazide (AH) contains two −NH 2 groups, one of them is attached to the aromatic ring and the other is the hydrazinic, −NH 2 . It is found that only the later reacts with the carbonyl compounds to form Schiff bases, while the former remains inert. The reasons behind this difference in reactivity are analyzed on the basis of semi-empirical calculations, which show that the lone pair of the ring −NH 2 is considerably delocalized over the ring, resulting in an accumulation of a positive charge on this particular nitrogen. Ni(II) complex of 2,6-diacetylpyridine bis(anthraniloyl hydrazone) has been prepared and characterized by various physico-chemical methods. The structure of the complex was determined by X-ray crystallography. It was found that in the solid state, the compound exist as a dimer, and two coordinated ligand moieties form a double helix around the two metal ions. H-bonding then results in extension of double helix to an infinite chain.

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Section: Methodsmentioning

confidence: 99%

Synthesis, characterization, and crystal structure of [Ni(dap(A)2)]2 (dap(AH)2: 2,6-diacetylpyridine bis(anthraniloyl hydrazone))—a molecule possessing an infinite double helical chain in the solid state

et al. 2007

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“…In the last few years, the compounds derived from the condensation reactions of carbonyl-containing compounds with substituted benzohydrazides have received considerable attention [1][2][3][4]. In this paper the title compound (Fig.…”

Section: Discussionmentioning

confidence: 99%

Crystal structure of N’-(3-bromo-2-hydroxybenzylidene)-4-methylbenzohydrazide methanol solvate, C16H17BrN2O3

Liu

2012

Zeitschrift für Kristallographie - New Crystal Structures

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C 16 H 17 BrN 2 O 3 ,t riclinic, P1 (no. 2), a =7 .338(2) Å, b =9 .210(2) Å,c =1 2.718(2) Å,a =9 7.981(2)°, Source of materialThetitle compound was synthesized by the reaction of 3-bromo-2-hydroxybenzaldehyde (1 mmol, 0.20 g) with 4-methylbenzohydrazide (1 mmol, 0.15 g) in absolute methanol (30 ml)a t ambient condition. Colourless needle-shaped single crystals were obtained by slow evaporation of the solution at room temperature afterseveral days. Experimental detailsTheamide Hatomwas locatedinadifferencemap andwas refined isotropically, with N-H =0.90(1) Å. Theremaining Hatomswere positioned geometrically and allowed to ride on their parent atoms, with C-H =0.93 Åfor aromatic and CH and 0.96 Å for CH 3 atoms, and with O-H =0.82 Å. The U iso values were constrained to be 1.5U eq of the carrier atom for methyl and hydroxyl Hatoms and 1.2U eq for the remaining Hatoms. Arotating group model was used for the methyl groups.

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“…Molybdenum only exhibits biological activity in its enzymatic oxomolybdenum complex, in which it catalyzes biochemical reactions and plays a crucial role in human metabolism (Dinda et al 2002). It is present as a molybdenum cofactor (Rajagopalan and Johnson 1992;Kisker, Schindelin, and Rees 1997;Hille 2002;Sigel and Sigel 2002) in sulfite oxidase, which participates in the metabolism of sulfur-containing amino acids; xanthine oxidase, which promotes purine and pyrimidine oxidation as well as uric acid production; and aldehyde oxidase.…”

Section: Introductionmentioning

confidence: 99%

Characterization of a Novel Dioxomolybdenum Complex by Cyclic Voltammetry

Knittl¹,

Rusakov²,

Короткова³

et al. 2015

Analytical Letters

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Metalloenzymes that carry a pterin-based molybdenum cofactor in their center catalyze numerous reactions in the human body and play a crucial role in its metabolism. Specifically, these enzymes promote redox reactions and oxygen transport in the body. Their absence may cause many problems leading to disability or even death in early childhood. Therefore, model compounds need to be synthesized and analyzed to investigate the reactivity, redox potential, and geometry of these cofactors. This study focused on electrode processes and determined the redox potentials of the new bis-(4-mercapto-5-(p-tolyl)-3H-1,2-dithiole-3-thione)-dioxomolybdenum complex by cyclic voltammetry. The 4-mercapto-5-(p-tolyl)-3H-1,2-dithiole-3-thione ligand underwent irreversible oxidation and reduction at thiol and thione functional groups. The new dioxomolybdenum complex showed a quasi-reversible two-stage electrode process.

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A family of mononuclear molybdenum-(vi), and -(iv) oxo complexes with a tridentate (ONO) ligand

Cited by 112 publications

References 34 publications

Synthesis, characterization, and crystal structure of [Ni(dap(A)2)]2 (dap(AH)2: 2,6-diacetylpyridine bis(anthraniloyl hydrazone))—a molecule possessing an infinite double helical chain in the solid state

Synthesis, characterization, and crystal structure of [Ni(dap(A)2)]2 (dap(AH)2: 2,6-diacetylpyridine bis(anthraniloyl hydrazone))—a molecule possessing an infinite double helical chain in the solid state

Crystal structure of N’-(3-bromo-2-hydroxybenzylidene)-4-methylbenzohydrazide methanol solvate, C16H17BrN2O3

Characterization of a Novel Dioxomolybdenum Complex by Cyclic Voltammetry

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