Copper-catalyzed autoxidation of carbohydrazide: kinetics and mechanism

Cosper, David R.; Kowalski, David J.

doi:10.1021/ie00103a007

Cited by 8 publications

(7 citation statements)

References 13 publications

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“…So, it has been used in the field of intermediate [1][2][3][4] of the organic synthesis for the fine chemicals and medicine, and an effective oxygen scavenger [5] to prevent corrosion especially in boiler feed system.…”

Section: Introductionmentioning

confidence: 99%

The preparation, molecular structure, and theoretical study of carbohydrazide (CHZ)

Zhang

2006

Struct Chem

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Carbohydrazide is prepared by reacting dimethyl carbonate with hydrazine hydrate. Its single crystal has been cultured with slow evaporation method. Its molecular structure and crystal structure have been determined by X-ray single crystal diffraction technique. The obtained results shows that the crystal belongs to Crystal system of Monoclinic, space group P2(1)/n with crystal parameters of a = 3.725(1) Å, b = 8.834(2) Å, c = 11.96(3) Å, β = 91.97(1) • , V = 392.23(2) Å 3 , Z = 4, D c = 1.522 g/cm 3 , µ = 0.128 mm −1 , F0 0 0) = 192. Based on the crystal data, we have also carried quantum chemistry calculations on the title compound using the B3LYP and MP2 method with cc-pVTZ basis set. The calculation results further demonstrate the molecular structure of title compound and its coordination properties.

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Section: Introductionmentioning

confidence: 99%

The preparation, molecular structure, and theoretical study of carbohydrazide (CHZ)

Zhang

2006

Struct Chem

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“…40 The decomposition of carbohydrazide in particular is known to facilitate the in situ formation of hydrazine. 53 This stepwise release of in situ generated hydrazine (which is an efficient fuel) and its subsequent exothermic decomposition into NO x and CO 2 would allow controlled release of excess energy for complete and profound crystal growth of WO 3−x nanorods. This controlled combustion of in situ generated hydrazine also avoids the unwanted nanoparticle sintering effect observed by several research groups, when hydrazine is added ex situ as a fuel.…”

Section: Resultsmentioning

confidence: 99%

NH- and CH-Substituted Ureas as Self-Assembly Directing Motifs for Facile Synthesis and Electrocapacitive Applications of Advanced WO_3–x One-Dimensional Nanorods

Salkar

Fernandes

Bhosale

et al. 2019

ACS Appl. Energy Mater.

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Designing a solid state crystal architecture at nanoscale, using a soft chemistry approach, is the key step toward their scalable synthesis for sustainable application in electrochemical charge storage devices. We investigate the application of NH- and CH-substituted ureas, namely, carbohydrazide, semicarbazide, N-methylurea, and tetramethylurea as design elements/motifs in the tailored synthesis of WO3–x nanostructures via direct calcination of tungstic acid-substituted urea hybrid gels. The SEM, HRTEM, SAED, XRD, XPS, and TG-DTA studies reveal that NH-substitution in urea induces a profound growth of WO3–x one-dimensional (1D) nanorods, preferentially growing along the (002) plane with enhancement in the percentage of oxygen vacancies. On the contrary, with the increase in CH-substitution in urea, the tendency to form 1D nanorods via self- assembly process decreases, possibly due to an increase in the steric effect of the methyl groups. We further demonstrate the corresponding effect of morphological and chemical changes in WO3–x nanostructure on their improved electrified interfacial processes via H+ intercalation using cyclic voltammetry, galvanostatic charge–discharge, electrochemical impedance spectroscopy tests, and chronoamperometric studies. Our findings reveal that the enhancement in WO3–x nanorod growth, W5+/W6+ redox surface states, and abundance of (002) surface plane due to NH-substitution in urea play a crucial role in facilitating the diffusion process of H+/e– in and out of the WO3–x matrix. An area specific capacitance of 132 mF cm–2 at the current density of 1 mA cm–2 with excellent capacitance retention is reported. Moreover, significant improvements in the charge–discharge times were observed, the highest being the one for WO3–x nanorods obtained using carbohydrazide, demonstrating its potential for possible application in designing 1D nanomaterials for energy storage systems.

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“…This study of CHZ is important as it has been used as an intermediate [145,146] of the organic synthesis for the fine chemicals and medicine, as an effective oxygen scavenger for prevention of corrosion [147] and in explosives and propellants [148,149]. Investigations of its molecular structure using X-ray single crystal diffraction techniques and theoretical calculations are reported.…”

Section: Issuementioning

confidence: 99%

Interplay of thermochemistry and Structural Chemistry, the journal (volume 17, 2006) and the discipline

Ponikvar‐Svet

Liebman

2009

Struct Chem

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Copper-catalyzed autoxidation of carbohydrazide: kinetics and mechanism

Cited by 8 publications

References 13 publications

The preparation, molecular structure, and theoretical study of carbohydrazide (CHZ)

The preparation, molecular structure, and theoretical study of carbohydrazide (CHZ)

NH- and CH-Substituted Ureas as Self-Assembly Directing Motifs for Facile Synthesis and Electrocapacitive Applications of Advanced WO_3–x One-Dimensional Nanorods

Interplay of thermochemistry and Structural Chemistry, the journal (volume 17, 2006) and the discipline

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Copper-catalyzed autoxidation of carbohydrazide: kinetics and mechanism

Cited by 8 publications

References 13 publications

The preparation, molecular structure, and theoretical study of carbohydrazide (CHZ)

The preparation, molecular structure, and theoretical study of carbohydrazide (CHZ)

NH- and CH-Substituted Ureas as Self-Assembly Directing Motifs for Facile Synthesis and Electrocapacitive Applications of Advanced WO3–x One-Dimensional Nanorods

Interplay of thermochemistry and Structural Chemistry, the journal (volume 17, 2006) and the discipline

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Product

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NH- and CH-Substituted Ureas as Self-Assembly Directing Motifs for Facile Synthesis and Electrocapacitive Applications of Advanced WO_3–x One-Dimensional Nanorods