New complexes of pentaamminechromium(III) with oxalate, glycinate, sulfate, and iodate as ligands.  Loss of ammonia from chromium(III)-ammine complexes

Ramasami, T.; Wharton, Roland K.; Sykes, A. Geoffrey

doi:10.1021/ic50144a031

Cited by 31 publications

(13 citation statements)

References 40 publications

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“…Ion-exchange separation of reactant solutions (for details see ref 6), over periods in which there was up to 50% consumption of Cr-(NH3)5H203+, indicated two products, Cr(NH3)5(02CCH2NH3)3+ and Cr(NH3)4(H20)(C>2CCH2NI43)3+, which have previously been characterized. 6 The kinetics were monitored at the 506-nm isosbestic point for the two products (t 39.8 M-1 cm-1). Concentration ranges Ka + [H+] (…”

Section: Methodsmentioning

confidence: 99%

Evidence for a dissociative mechanism in the reaction of glycine with aquopentaamminechromium(III). Ionic strength contributions (as a 1:1 electrolyte) and ion-pairing (KIP) ability of the glycine zwitterion

Ramasami¹,

Taylor²,

Sykes³

1976

Inorg. Chem.

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Section: Methodsmentioning

confidence: 99%

Evidence for a dissociative mechanism in the reaction of glycine with aquopentaamminechromium(III). Ionic strength contributions (as a 1:1 electrolyte) and ion-pairing (KIP) ability of the glycine zwitterion

Ramasami¹,

Taylor²,

Sykes³

1976

Inorg. Chem.

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“…Homogeneous hydroxylation of metal ions and formation of metal ammine complex [8] from metal hydroxides are given by addition of urea caused by thermal decomposition of urea to ammonia. In addition, alcoholamines chelate metal ions [7,9].…”

Section: Chemical State and Viscosity Of Precursor Solsmentioning

confidence: 99%

Effects of Amines on Chemical and Physical Behaviors of Viscous Precursor Sols to Indium Gallium Zinc Oxide

et al. 2013

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We synthesized viscous precursors to indium gallium zinc oxide (IGZO) using three kinds of alcoholamines, ethanolamine (EA), diethanolamine (DEA), and triethanolamine (TEA), by a simple process. The viscous precursors are obtained just by vigorous stirring of alcoholamine and urea in an aqueous solution containing the metal nitrates during heating at 150-160 ºC. The precursor containing EA (EA-precursor) is a pale-orange suspension containing aggregates of the metal hydroxides and shows pseudoplastic flow. The precursors containing DEA (DEAprecursor) and TEA (TEA-precursor) are transparent pale-yellow and dark-orange sols, respectively. They give Newtonian flow in the lower shear rate and pseudoplastic flow in the higher shear rate. Higher concentration of metal salts leads to higher viscosity of the precursors. According to thermogravimetry-differential thermal analysis (TG-DTA) for the EA-and DEAprecursors, evaporation of alcoholamine occurs at around each boiling point and subsequently formation of metal oxides occur at around 300 ºC. In the case of the TEA-precursor, formation of metal oxides occurs before pyrolysis of TEA attributed to the higher boiling point of TEA. The thin IGZO film, which is prepared by spin-coating of the diluted DEA-precursor and subsequent sintering at 450 ºC for 30 min, shows 0.02 cm 2 ·V -1 s -1 of the mobility and 10 -5 of the on/off ratio. The highly viscous DEA-precursor containing high concentration of metal ions allows patterning in an area of 100 cm 2 onto a surface of a silicon wafer with screen printing.

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“…Chromium (III) complexes are generally inert to the ligand substitution reactions 10 but reactions can be rapid under certain circumstances. Increased liability due to the presence of OH reported for Chromium (III) 11,12 . Lower enthalpy of activation for complexation reaction (92KJ mol -1 ) and large negative value of ∆S(-175JK -1 mol -1 ) suggest the more pronounced participation of incoming ligand in the transition state and confirm the transformation of the outer sphere complex into inner sphere complex 9 .…”

Section: Introductionmentioning

confidence: 99%

Spectral Characrisation, Thermal Decomposition and Kinetic Study of Chromium (Iii) Complexes With Salicylic Acid

Mishra¹

2018

RJC

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Two chromium complexes were prepared by using chromium trioxide (CrO3) and salicylic acid. Complexes [Cr (C7H5O3) (OH)2 (H2O)3] 2H2O and [Cr (C7H5O3)2 (OH) (H2O)3] H2O were prepared with salicylic acid. Their spectral characterization was done by using Elemental analysis (C and H), Inductively coupled plasma optical emission spectroscopy (ICP -OES), Ultraviolet-visible (UV-VIS) Spectroscopy , Fourier Transform infrared (FTIR) spectroscopy, proton Nuclear Magnetic Resonance ( 1 HNMR) spectroscopy and Fast Atomic Bombardment (FAB) Mass spectrometry, whereas Thermal decomposition was investigated by Differential scanning calorimetric (DSC). Kinetic parameters were obtained from DSC and the low value of activation energy of the exothermic change indicated lability of the complexes. The study includes kinetics, lability and energetic nature of the complexes prepared.

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New complexes of pentaamminechromium(III) with oxalate, glycinate, sulfate, and iodate as ligands. Loss of ammonia from chromium(III)-ammine complexes

Cited by 31 publications

References 40 publications

Evidence for a dissociative mechanism in the reaction of glycine with aquopentaamminechromium(III). Ionic strength contributions (as a 1:1 electrolyte) and ion-pairing (KIP) ability of the glycine zwitterion

Evidence for a dissociative mechanism in the reaction of glycine with aquopentaamminechromium(III). Ionic strength contributions (as a 1:1 electrolyte) and ion-pairing (KIP) ability of the glycine zwitterion

Effects of Amines on Chemical and Physical Behaviors of Viscous Precursor Sols to Indium Gallium Zinc Oxide

Spectral Characrisation, Thermal Decomposition and Kinetic Study of Chromium (Iii) Complexes With Salicylic Acid

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