The H_ acidity function in ethylene and propylene glycols
TL;DR: In this paper, the acidity function has been determined for solutions of sodium and lithium glycollates in ethylene and propylene glycols with a series of nitrodiphenyl-amines as indicators.
Abstract: The H_ acidity function has been determined for solutions of sodium and lithium glycollates in ethylene and propylene glycols with a series of nitrodiphenyl-amines as indicators. The validity of the H_ function has been established in basic solutions of ethylene glycol but not in propylene glycol. Equilibrium constants have been reported for the ionization of some nitrodiphenylamines in basic solutions of the two glycols.
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TL;DR: (1970).
Abstract: (1970). F., Vyuokomol. Soedin, Ser. A, 12, 1155 (1970). (359) Yamamoto, A., Yamada, K., Murate, M., Akiyama, J. Therm. Anal., Proc. Znt. Cmf., d, 1988, 1, 105 (1969). (360;k;;ung, W. R., Barrall, E. M. 11, Aviram, A., Anal. Calorimetry, h o c . Sym 9d, 2, 113 (1970). (361) 2;. omg, W. R., Haller, I., Aviram, A., Mol. Cryat. Liquid Cryst., 13, 357 (1971). (362) Zamyatnin, A. A., Zwod. Lab., 45, 1007 (1971). (363) Zsako, J., J . Therm. Anal., 2, 145 (1970). (364) Zsinka, L., Szirtes, L. Stenger, V.1 Radiocham. Radioanal. Lett., 4, 257 (1970).
11 citations
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TL;DR: In this paper, the polarographic reduction of 4-nitro DPA in methanol-water mixtures of varying composition in the pH range 1-12 was investigated, and a single wave was observed in the reduction in these media at all pH values and solvent compositions.
5 citations
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TL;DR: In this paper, the variation of the redox acidity function, R0(H), based on ferrocene redox couple has been studied at 25 °C as a function of solvent composition in diethylene glycol-water and ethanol-water mixtures and compared with the H0 variation in these solvents.
Abstract: The variation of the redox acidity function, R0(H) , based on ferrocene redox couple has been studied at 25 °C as a function of solvent composition in diethylene glycol–water and ethylene glycol–water mixtures and compared with the H0 variation in these solvents. Further, the redox function for sulfuric acid has been reported upto 6 molal in 50 wt% diethylene glycol–water mixture as the solvent.
2 citations
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TL;DR: The title compound, C12H7N5O8, was previously described in space group P21/n with Z = 4 and was obtained from a mixed solution of dichloromethane and hexane.
Abstract: The title compound, C12H7N5O8, was previously described in space group P21/n with Z = 4 [Wu et al. (2007). Acta Cryst. E63, o4194]. The current monoclinic P21/c polymorph was obtained from a mixed solution of dichloromethane and hexane. The dihedral angle between the benzene rings is 44.16 (5)°, smaller than in the previously reported polymorph [56.3 (2)°]. As a result of the steric hinderance of the nitro groups, hydrogen bonding is limited intramolecularly. The dihedral angles between the phenyl rings and their attached nitro groups are 18.97 (6) and 17.71 (5)° at the 2-position, and 18.52 (6) and 32.41 (6)° at the 4-position.
1 citations
Cites background from "The H_ acidity function in ethylene..."
...For general background, see Espinoza & Thornton (1994); Farrell et al. (1985); Chattanathan & Kalidas (1971); Southgate & Hall (1971); Stewart & O’Donnell (1964)....
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TL;DR: In the case of C12H7N5O8, the dihedral angle between the two benzene rings is 56.3°(2)° as mentioned in this paper, and the crystal packing is stabilized by intra-molecular N-H⋯O and inter-Molecular C-H-O hydrogen bonds.
Abstract: In the title compound, C12H7N5O8, the dihedral angle between the two benzene rings is 56.3 (2)°. The crystal packing is stabilized by intramolecular N—H⋯O and intermolecular C—H⋯O hydrogen bonds.
Cites methods from "The H_ acidity function in ethylene..."
...And they were acted as indicators to study the H acidity function in ethylene and propylene glycols (Chattanathan & Kalidas, 1971)....
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