Kinetics and mechanism of the nitroamine–nitrous acid reaction

Hughes, Martin N.; Lusty, James R.

doi:10.1039/dt9760001175

Cited by 10 publications

(5 citation statements)

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“…It should also be remarked that the length of the C--N bond opposite the phenolic group is 0.017 .~, shorter than the corresponding bond of the nitro group in the ortho position. Similar ring distortions have been found in other o-nitrophenolates and were interpreted as evidence of a partial quinonoid character of the ring (Bush & Truter, 1971) and secondorder hybridization at the C atoms with neighbouring substituents (Hughes, 1975).…”

Section: Commentsupporting

confidence: 71%

Potassium 3-Formyl-2,4-dinitrophenolate Dihydrate

Paixão¹,

Beja²,

Silva³

et al. 1998

Acta Crystallogr C

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Section: Commentsupporting

confidence: 71%

Potassium 3-Formyl-2,4-dinitrophenolate Dihydrate

Paixão¹,

Beja²,

Silva³

et al. 1998

Acta Crystallogr C

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“…With the M + cations the stoichiometry may be 2(cations): l(molecule) or 1:1 (Poonia & Truter, 1973). Crystal structure analyses have been carried out on the di(potassium thiocyanate)-dibenzo-24-crown-8 complex (Mercer & Truter, 1973) and on the di(sodium o-nitrophenolate)-dibenzo-24-crown-8 complex (Hughes, 1975). Different conformations were found for the molecule in the two complexes.…”

Section: Introductionmentioning

confidence: 99%

The crystal structure of a complex between barium perchlorate and dibenzo-24-crown-8: bisperchlorato(6,7,9,10,12,13,20,21,23,24,26,27-dodecahydrodibenz[b,n][1,4,7,10,13,16,19,22]octaoxacyclotetracosin)barium

Hughes¹,

Mortimer²,

Truter³

1978

Acta Crystallogr Sect B

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Ba(CIO4)2C24H3208 forms orthorhombic crystals with a = 21.247 (4), b = 8.583 (1), c = 34.081 (3) A, and eight formula units in the unit cell. Systematic absences correspond to the space groups Pna2~ or Pnam.Intensities were collected twice, on a Picker four-circle diffractometer and on an Enraf-Nonius CAD-4 diffractometer. The structure was solved by the heavy-atom method with considerable difficulty; there are two molecules pseudocentrosymmetrically related in the asymmetric unit in space group Pna2~. In the final refinement H atoms were omRted, C atoms were isotropic and other atoms anisotropic, parameters of the two molecules being refined in alternate cycles until R = 0.0598 for 5554 observations. Each Ba ion is 10-coordinated, by the eight O atoms of the ligand (Ba-O 2.76-3.04 A) which cradles, but does not enclose, the cation, and by two perchlorate ions, one unidentate (Ba-O 2.72 A) and the other possibly bidentate (Ba-O 2.79 and 3.3 A).

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“…Sodium ion has higher charge density than K + , consequently it is more stabilized by solvent and has lower tendency for complexation with L1. On the other hand, the poly(oxyethylene) compounds similar to crown ethers [14,20] form a complex, that the complexed cation is placed in the cavity. An important parameter that can be affected on the host-guest complexes is the size of host cavity and the diameter of the guest.…”

Section: Resultsmentioning

confidence: 99%

pH Metric Study of Complexe Formation of Some Alkali and Alkaline Earth Metal with two Dicarboxylic Acid Ligands

Shabani¹,

Abbasdpour²,

Sharghi³

2007

ECS Trans.

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The stability constants of two dicarboxylic acid ligands (1,7-Bis (2′-benzoic acid)-1,4,7-trioxaheptane (L1) and 1,10-Bis(2′-benzoic acid)-1,4,7,10-tetraoxadecane(L2) ) with Na +, K + , Ca 2+ and Mg 2+ in ethanol -water solvent mixtures were determined. The ratio of ligand / metal in these complexes is 1/1, and the stability constants of K + with L1 and L2 are higher than Na + and the stability constants of Ca 2+ with L1 and L2 are higher than Mg 2+ complexes. These studies also showed that the stability constants of Na + and K + complexes with L1 and L2 increases by an increase in the mole fraction of ethanol in the solvent mixtures. IntroductionAlkali and alkaline earth cations play diverse vital roles[1-4 ] in biological systems. The important biological implications of Na + , K + , Mg 2+ and Ca 2+ especially with respect to their membrane transport phenomena [5][6][7][8] causes much attention in study of complexes of these cations. Ederson [9] in 1967 discovered that these cations undergoes complexation with the crown ethers to produce crystalline products. Several acyclic polyethers were found to dissolve small quantities of potassium metal and sodium-potassium alloy [10]. Studies on other acyclic multidentates such as poly(oxyethylene) derivatves [11][12] have also been carried out with these cations. In 1985, pentaethyleneglycol diethyl ethers complexation of M + ions was studied using low temperature 1 H.N.M.R spectroscopy by Raban et al [13].A synthetic acyclic ionophore with a single benzoic acid terminal group has been used[14] to study the transport of Na + and K + ions through a dichloroethane liquid membrane. The results showed that this ionophore has a higher selectivity for K + ions than any other alkali ions.Using calorimetric titration the thermodynamic parameters and stability constants for complex formation between a series of acyclic polyethers and alkali or alkaline earth cations have been determined in CH 3 OH [15].The complexing properties of the naturally occurring acyclic ionophores, lysocellin[16] and monesin [17] have been studied using potentiometric and calorimetric methods, respectively. In complexation of M + (M = Na, K) by lysocelline selectivity favors K + , whereas its Mg 2+ /Ca 2+ selectivity favors Calcium ion [16].

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Kinetics and mechanism of the nitroamine–nitrous acid reaction

Cited by 10 publications

References 0 publications

Potassium 3-Formyl-2,4-dinitrophenolate Dihydrate

Potassium 3-Formyl-2,4-dinitrophenolate Dihydrate

The crystal structure of a complex between barium perchlorate and dibenzo-24-crown-8: bisperchlorato(6,7,9,10,12,13,20,21,23,24,26,27-dodecahydrodibenz[b,n][1,4,7,10,13,16,19,22]octaoxacyclotetracosin)barium

pH Metric Study of Complexe Formation of Some Alkali and Alkaline Earth Metal with two Dicarboxylic Acid Ligands

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