The Theory and Kinetics of Specific Oxidation. III. The Cerate--2,3-Butanediol Reaction in Nitric Acid Solution

Duke, Frederick R.; Forist, Arlington A.

doi:10.1021/ja01176a056

Cited by 105 publications

(29 citation statements)

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“…The ceric ions concentration was varied from 4.0 to 24.0 ϫ 10 Ϫ3 mol dm Ϫ3 and the observed results are given in Figure 3 and Table III. The reported studies on ceric ion-initiated polymerization clearly indicated that ceric ions in the absence of sufficient nitric acid form inactive species with water moleculers 19 ; hence, great care was taken to keep sufficient nitric acid (Ͼ8.0 ϫ 10 Ϫ2 mol dm Ϫ3 ) in the reaction mixture to maintain the activity of the ceric ions to create active sites at the backbone of the cellulose. The percent graft yield increased [ Fig.…”

Section: Effect Of Ceric Ions Concentrationmentioning

confidence: 99%

Grafting of acrylonitrile and methyl methacrylate from their binary mixtures on cellulose using ceric ions

Gupta

Sahoo

2000

J. Appl. Polym. Sci.

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Section: Effect Of Ceric Ions Concentrationmentioning

confidence: 99%

Grafting of acrylonitrile and methyl methacrylate from their binary mixtures on cellulose using ceric ions

Gupta

Sahoo

2000

J. Appl. Polym. Sci.

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“…. It is generally considered that Ce 4ϩ forms complex with alcohol, 26 which then decomposes to yield an alcohol radical according to the following equation: The average molecular weight of poly(MMA) was determined from the viscosity of benzene solution at 30°C. where K and K d denote the equilibrium constant and decomposition rate constant, respectively.…”

Section: Resultsmentioning

confidence: 99%

Effect of ultrasonic irradiation on ceric-salt-initiated grafting of methyl methacrylate onto regenerated cellulose film

Kondo

Kubota

Katakai

1999

J. Appl. Polym. Sci.

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Effect of ultrasonic irradiation on ceric salt (Ce 4ϩ )-initiated grafting of methyl methacrylate (MMA) on regenerated cellulose film (thickness ϭ 20 m) was investigated under an air atmosphere in water solvent at 60°C. The grafting system with the ultrasonic irradiation was characterized by higher percentage of grafting and graft efficiency than the system without the irradiation. Reaction of cellulose with Ce 4ϩ was also accelerated by the ultrasonic irradiation. No accelerating effect of grafting due to the ultrasonic irradiation was observed for the system under reduced pressure of 5 torr. The effect of the ultrasonic irradiation on the average molecular weight of MMAgrafted chains was also studied. Moreover, the surface layer of the resulting grafted films was examined by attenuated total reflection-infrared (ATR-IR) measurement and scanning electron microscopy (SEM) observation.

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“…The oxidation of some organic substrates by Ce(IV), believed to occur by direct attack of the ceric species on the substrate, appears to proceed by electron abstraction [1][2][3], while in some cases the reaction goes through an intermediate complex [4][5][6]. Ammonium ceric nitrate gives more intense colours with hydroxy compounds than does ceric sulfate, mostly due to the complex formation with them and the subsequent liberation of a free radical by the decomposition of the complex.…”

Section: Introductionmentioning

confidence: 99%

Aqueous polymerization of methyl acrylate initiated by ceric ion-reducing agent systems in nitric acid medium

Reddy¹,

Srinivasan²

2000

Designed Monomers and Polymers

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Abstract-A kinetic study of the aqueous polymerization of methyl acrylate (MA) was carried out at 30 • C in nitric acid medium by employing ammonium ceric nitrate (ACN)-methyl cellosolve (MC) and ACN-ethyl cellosolve (EC) as the redox initiator systems. The ceric ion consumption was found to be first order with respect to the ceric ion concentration with both initiator systems. The formation of complexes between Ce(IV) and reducing agents was observed. The orders with respect to Ce(IV), the reducing agents, and the monomer were evaluated for the aqueous polymerization of MA by Ce(IV)-reducing agent (RA) initiator systems. The overall activation energies, E overall , for the aqueous polymerization of MA were evaluated in the temperature range 27-40 • C. The effect of constant nitrate ion in the reaction medium was studied. A kinetic mechanism for the aqueous polymerization of MA initiated by redox initiator systems is presented.

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The Theory and Kinetics of Specific Oxidation. III. The Cerate--2,3-Butanediol Reaction in Nitric Acid Solution

Cited by 105 publications

References 0 publications

Grafting of acrylonitrile and methyl methacrylate from their binary mixtures on cellulose using ceric ions

Grafting of acrylonitrile and methyl methacrylate from their binary mixtures on cellulose using ceric ions

Effect of ultrasonic irradiation on ceric-salt-initiated grafting of methyl methacrylate onto regenerated cellulose film

Aqueous polymerization of methyl acrylate initiated by ceric ion-reducing agent systems in nitric acid medium

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