(4-Nitrophenyl)methylidene-dioxidoazanium | 66291-19-8

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: (4-Nitrophenyl)methylidene-dioxidoazanium
• CAS: 66291-19-8
• 化学式: C₇H₅N₂O₄
• 分子量: 181.128
• InChiKey: SDDKBWPIFZJMDW-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.9
• 重原子数：
  13
• 可旋转键数：
  1
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.0
• 拓扑面积：
  91.6
• 氢给体数：
  0
• 氢受体数：
  5

反应信息

• 作为反应物：
  描述：

  (4-Nitrophenyl)methylidene-dioxidoazanium 在 2-[(4-氯苯基)甲基]丙二腈 、 potassium chloride 作用下， 以 水 、 二甲基亚砜 为溶剂， 生成 1-硝基-4-(硝基甲基)苯
  参考文献：
  名称：

  质子从碳酸转移到碳负离子。1. 各种碳酸与取代苄基丙二腈的阴离子在 90% Me2SO-10% 水中的反应。从马库斯关系确定身份反应的内在障碍

  摘要：

  9-氰基芴 (2)、1,3-茚二酮 (3)、4-硝基苯基-乙腈 (4)、(3-硝基苯基)硝基甲烷 (5) 和 (4-硝基苯基) 硝基甲烷可逆去质子化的动力学研究(6) 由取代的苄基丙二腈 (1-X-) 的阴离子在 90M Me 2 SO-10% 水 (v/v) 中在 20 o C 报告。这些反应的内在速率常数和内在势垒已通过斜率 (β) 均接近 0.5 的 BrOnsted 图的外推或内插确定

  DOI：

  10.1021/ja00065a016
• 作为产物：
  描述：

  1-硝基-4-(硝基甲基)苯 在 C₁₀H₆ClN₂^(1-) 、 potassium chloride 作用下， 以 水 、 二甲基亚砜 为溶剂， 生成 (4-Nitrophenyl)methylidene-dioxidoazanium
  参考文献：
  名称：

  质子从碳酸转移到碳负离子。1. 各种碳酸与取代苄基丙二腈的阴离子在 90% Me2SO-10% 水中的反应。从马库斯关系确定身份反应的内在障碍

  摘要：

  9-氰基芴 (2)、1,3-茚二酮 (3)、4-硝基苯基-乙腈 (4)、(3-硝基苯基)硝基甲烷 (5) 和 (4-硝基苯基) 硝基甲烷可逆去质子化的动力学研究(6) 由取代的苄基丙二腈 (1-X-) 的阴离子在 90M Me 2 SO-10% 水 (v/v) 中在 20 o C 报告。这些反应的内在速率常数和内在势垒已通过斜率 (β) 均接近 0.5 的 BrOnsted 图的外推或内插确定

  DOI：

  10.1021/ja00065a016

文献信息

• Proton transfer from carbon acids to carbanions. 1. Reactions of various carbon acids with the anions of substituted benzylmalononitriles in 90% Me2SO-10% water. Determination of intrinsic barriers of identity reactions from the Marcus relationship
  作者：Claude F. Bernasconi、Jiu Xiang Ni

  DOI：10.1021/ja00065a016

  日期：1993.6

  (3-nitrophenyl)nitromethane (5), and (4-nitrophenyl)nitromethane (6) by the anions of substituted benzylmalononitrile (1-X-) in 90M Me 2 SO-10% water (v/v) at 20 o C is reported. Intrinsic rate constants and intrinsic barriers of these reactions have been determined by extrapolation or interpolation of BrOnsted plots whose slopes (β) are all close to 0.5

  9-氰基芴 (2)、1,3-茚二酮 (3)、4-硝基苯基-乙腈 (4)、(3-硝基苯基)硝基甲烷 (5) 和 (4-硝基苯基) 硝基甲烷可逆去质子化的动力学研究(6) 由取代的苄基丙二腈 (1-X-) 的阴离子在 90M Me 2 SO-10% 水 (v/v) 中在 20 o C 报告。这些反应的内在速率常数和内在势垒已通过斜率 (β) 均接近 0.5 的 BrOnsted 图的外推或内插确定
• Kinetic isotope effect and tunnelling in the reaction between 4-nitrophenylnitromethane and pentamethylguanidine in acetonitrile and toluene
  作者：Jan. H. Blanch、Otto Rogne、Leif I. Rossemyr

  DOI：10.1039/f19807601905

  日期：——

  Rates and activation parameters for the proton and deuteron transfer reaction of 4-nitrophenylnitro-methane with pentamethylguanidine in acetonitrile have been determined. The isotope effect and differences in activation parameters are larger than the semiclassical limits and suggest a small but significant tunnel correction. The results are well accounted for by Bell's equation for tunnelling through

  确定了4-硝基苯基硝基甲烷与五甲基胍在乙腈中的质子和氘核转移反应的速率和活化参数。同位素效应和激活参数的差异大于半经典限值，表明隧道校正幅度较小，但意义重大。贝尔方程式很好地解释了通过抛物线形隧道的结果。将乙腈的结果与先前获得的甲苯值进行比较表明，溶剂极性对隧道校正没有明显影响。
• Kinetic study of the reactions of various types of C-acids with amine bases in acetonitrile. An unusual effect of common BH<sup>+</sup> cation on the rate constants
  作者：Wlodzimierz Galezowski、Iwona Grzeskowiak、Arnold Jarczewski

  DOI：10.1139/cjc-77-5-6-1042

  日期：——

  The rates of proton transfer reactions between C-acids of different types such as 1-(4-nitrophenyl)-1-nitroalkanes, 4-nitrophenylcyanomethanes, and 2,4,6-trinitrotoluene, and organic bases such as 1,1,3,3-tetrametylguanidine, 7-methyl-1,5,7-triazabicyclo[4.4.0]dec-5-ene (MTBD), and tri-n-butylamine have been measured in acetonitrile at pseudo-first-order conditions. A general equation for the rates of proton transfer reactions between C-acids and bases with product existing in two forms, ions and ion pairs, has been derived and its applicability tested. The equation works well except for reactions of 1-(4-nitrophenyl)-1-nitroalkanes with guanidines for which the second-order rate constant is diminished with concentration of guanidinium cation, while tetrabutylammonium salts accelerate the reactions. Possible reasons for this are discussed.
• Kinetics of deprotonation of arylnitromethanes by benzoate ions in acetonitrile solution. Effect of equilibrium and nonequilibrium transition state solvation on intrinsic rate constants of proton transfers
  作者：Joseph R. Gandler、Claude F. Bernasconi

  DOI：10.1021/ja00028a032

  日期：1992.1

  Second-order rate constants for benzoate ion promoted deprotonation reactions of (3-nitrophenyl)nitromethane, (4-nitrophenyl)nitromethane, and (3,5-dinitrophenyl)nitromethane have been determined in acetonitrile solution at 25-degrees-C. These data were obtained at low benzoate buffer concentrations (< 0.01 M), utilizing tetraethylammonium benzoate salts, and benzoate ion concentrations corrected for homoconjugation with data previously reported by Kolthoff and Chantooni. Acidity constants in acetonitrile have also been determined: (3-nitrophenyl)nitromethane, pK(a) = 21.7; (4-nitromethyl)nitromethane, pk(a) = 20.6; and (3,5-dinitrophenyl)nitromethane, pK(a) = 19.8. A Bronsted beta(B) value of 0.56 and an alpha(CH) value of 0.79 have been calculated for the benzoate, 3-bromobenzoate, and 4-nitrobenzoate ion promoted reactions of (3,5-dinitrophenyl)nitromethane and for the benzoate ion promoted reactions of (3-nitrophenyl)nitromethane and (3,5-dinitrophenyl)nitromethane, respectively; (4-nitrophenyl)nitromethane deviates negatively from the Bronsted plot due to the resonance effect of the 4-nitro group. The logarithms of the intrinsic rate constants for benzoate promoted deprotonations of (3-nitrophenyl)nitromethane, (4-nitrophenyl)nitromethane, and (3,5-dinitrophenyl)nitromethane are 4.81, 4.58, and 5.27, respectively, and these values are 1.43, 1.70, and 1.30 log units, respectively, higher in acetonitrile than in dimethyl sulfoxide. Transfer activity coefficients from dimethyl sulfoxide (D) to acetonitrile (A) solution, log D(gamma)A for (3-nitrophenyl)nitromethyl anion (0.28), (4-nitrophenyl)nitromethyl anion (0.56), (3-nitrophenyl)nitromethane (0.18), and (4-nitrophenyl)nitromethane (0.16) have been calculated, and log D(gamma) A for benzoic acid (approximately 1.9) and the benzoate ion (approximately 0.25) have been estimated. The solvent effects on the intrinsic rate constants are analyzed within the framework of the Principle of Nonperfect Synchronization (PNS) in terms of contributions by late solvation of the arylnitromethyl anion, late solvation of the benzoic acid (produced as a product of the reaction), early desolvation of the benzoate ion and the arylnitromethane, and by a classical solvent effect. The results are also compared with predictions by a theoretical model recently proposed by Kurz. For the comparison of intrinsic rate constants in water and dimethyl sulfoxide there is good agreement between the Kurz model and the experimental results as well as the PNS analysis, but there is a discrepancy between the results and the predictions of the Kurz model for the comparison of intrinsic rate constants in dimethyl sulfoxide and acetonitrile solutions.
• Solvent Effects on Proton Transfer Reactions:  Benzoate Ion Promoted Deprotonation Reactions of Arylnitromethanes in Methanol Solution
  作者：Joseph R. Gandler、Oliver L. Saunders、Ronald Barbosa

  DOI：10.1021/jo970409f

  日期：1997.7.1

  Second-order rate constants and equilibrium constants have been determined for the benzoate ion promoted deprotonation reactions of (m-nitrophenyl)nitromethane, (p-nitrophenyl)nitromethane, and (3,5-dinitrophenyl)nitromethane in methanol solution. The pK(a) values for the arylnitromethanes in methanol are the following: pK(a) = 10.9, 10.5, and 9.86 for (m-nitrophenyl)-nitromethane, (p-nitrophenyl)nitromethane, and (3,5-dinitrophenyl)nitromethane, respectively, relative to benzoic acid (pK(a) = 9.4). A Bronsted beta(B) value of 0.50 and alpha(CH) value of 1.31 have been calculated for the 3,4-dimethylbenzoate, benzoate, m-bromobenzoate, and 3,4-dichlorobenzoate ion promoted reactions of(3,5-dinitrophenyl)nitromethane, and for the benzoate ion promoted reactions of (m-nitrophenyl)nitromethane, (p-nitrophenyl)nitromethane, and (3,5-dinitrophenyl)nitromethane, respectively. The log of the intrinsic rate constants for benzoate ion promoted deprotonations of (m-nitrophenyl)nitromethane, (p-nitrophenyl)nitromethane, and (3,5-dinitrophenyl)nitromethane are 0.0212, 0.270, and 0.877, respectively. These values are 6.3 x 10(4), 2.0 x 10(4), and 2.5 x 10(4) times lower than for the same reactions in acetonitrile solution. The transfer activity coefficient from methanol to acetonitrile solution, log (M) gamma(AN), for (m-nitrophenyl)nitromethyl anion (3.6) and (m-nitrophenyl)nitromethane (-1.0) have been calculated. The solvent effect on these reactions in methanol and acetonitrile, two solvents with similar dielectric constants, are analyzed within the framework of the Principal of Nonperfect Synchronization. The results suggest that the observed solvent effect is a result of an imbalanced transition state (i.e., PNS effects), and a stronger transition state hydrogen bond between the carbon acid and benzoate ion in acetonitrile than in methanol solution.