2,6-Dimethyl-phenoxyradikal | 3229-35-4

• 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: 2,6-Dimethyl-phenoxyradikal
• CAS: 3229-35-4
• 化学式: C₈H₉O
• 分子量: 121.159
• InChiKey: BPEQGCWMQCYPOW-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.4
• 重原子数：
  9
• 可旋转键数：
  0
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.25
• 拓扑面积：
  1
• 氢给体数：
  0
• 氢受体数：
  0

反应信息

• 作为反应物：
  描述：

  对甲酚 、 2,6-Dimethyl-phenoxyradikal 在 二叔丁基过氧化物 作用下， 以 苯 为溶剂， 生成
  参考文献：
  名称：

  Magnaterra, Francesca; Pedrielli, Pamela; Pedulli, Gian Franco, Gazzetta Chimica Italiana, 1996, vol. 126, # 10, p. 673 - 678

  摘要：

  DOI：
• 作为产物：
  描述：

  2,6-二甲基苯酚 在 (1-溴-2-甲基丙烷-2-基)苯 、 六正丁基二锡 作用下， 以 甲苯 为溶剂， 生成 2,6-Dimethyl-phenoxyradikal
  参考文献：
  名称：

  取代酚对烷基自由基的反应性

  摘要：

  伯烷基自由基与取代酚类化合物反应的速率常数已在室温下在苯或甲苯中使用自由基时钟技术测量。使用三种具有代表性的苯酚，在邻位含有不同大小的取代基，在不同温度下研究了氢转移到烷基的动力学以获得相应的阿伦尼乌斯参数。还在作为氢键受体的六种不同溶剂中研究了动力学溶剂对与 α-生育酚反应的影响，同时研究了与 2,4,6-三甲基苯酚和 2,6-二叔丁基苯酚在甲苯和γ-戊内酯。对于某些酚类，还研究了自聚集对动力学参数的影响。

  DOI：

  10.1021/ja982405d

文献信息

• Importance of π-Stacking Interactions in the Hydrogen Atom Transfer Reactions from Activated Phenols to Short-Lived<i>N</i>-Oxyl Radicals
  作者：Marco Mazzonna、Massimo Bietti、Gino A. DiLabio、Osvaldo Lanzalunga、Michela Salamone

  DOI：10.1021/jo500789v

  日期：2014.6.6

  A kinetic study of the hydrogen atom transfer from activated phenols (2,6-dimethyl- and 2,6-di-tert-butyl-4-substituted phenols, 2,2,5,7,8-pentamethylchroman-6-ol, caffeic acid, and (+)-cathechin) to a series of N-oxyl radical (4-substituted phthalimide-N-oxyl radicals (4-X-PINO), 6-substituted benzotriazole-N-oxyl radicals (6-Y-BTNO), 3-quinazolin-4-one-N-oxyl radical (QONO), and 3-benzotriazin-4-one-N-oxyl

  活化酚（2,6-二甲基-和2,6-二叔丁基-4-取代的酚，2,2,5,7,8-五甲基苯并吡喃-6-ol，咖啡酸和（+）-儿茶素）形成一系列N-氧基（4-取代的邻苯二甲酰亚胺-N-氧基（4-X-PINO），6-取代的苯并三唑-N-氧基（6-Y- BTNO），3-喹唑啉-4-酮-N-氧基（QONO）和3-苯并三嗪-4-酮-N-氧基（BONO））是通过激光闪光光解法在CH 3 CN中进行的。观察到N-氧基自由基结构对氢转移速率常数（k H）有显着影响。k H值随N-羟胺的NO–H键解离能（BDE NO-H）的增加而单调增加。对动力学数据的分析以及理论计算的结果表明，这些反应是通过氢原子转移（HAT）机理进行的，其中N-氧基和酚式芳环采用π堆积排列。理论计算还表明，N-氧基自由基对在π堆积构象中发生的电荷转移具有明显的结构作用。k H的比较在这项研究中测得的值与先前报道的氢原子转移至枯基过氧自由基的那些值表明，6-CH
• Reactivity of Substituted Phenols Toward Alkyl Radicals
  作者：Paola Franchi、Marco Lucarini、Gian Franco Pedulli、Luca Valgimigli、Bruno Lunelli

  DOI：10.1021/ja982405d

  日期：1999.1.1

  The rate constants for the reaction of primary alkyl radicals with substituted phenolic compounds have been measured in benzene or toluene at room temperature by using the radical clock technique. With three representative phenols, containing in the ortho positions substituents of different size, the kinetics of the hydrogen transfer to alkyl radicals was studied at different temperatures to obtain the

  伯烷基自由基与取代酚类化合物反应的速率常数已在室温下在苯或甲苯中使用自由基时钟技术测量。使用三种具有代表性的苯酚，在邻位含有不同大小的取代基，在不同温度下研究了氢转移到烷基的动力学以获得相应的阿伦尼乌斯参数。还在作为氢键受体的六种不同溶剂中研究了动力学溶剂对与 α-生育酚反应的影响，同时研究了与 2,4,6-三甲基苯酚和 2,6-二叔丁基苯酚在甲苯和γ-戊内酯。对于某些酚类，还研究了自聚集对动力学参数的影响。
• Photophysical properties of methylated phenols in nonpolar solvents
  作者：G. Grabner、G. Koehler、G. Marconi、S. Monti、E. Venuti

  DOI：10.1021/j100372a045

  日期：1990.5
• A Quantitative Approach to the Recycling of α-Tocopherol by Coantioxidants
  作者：Riccardo Amorati、Fiammetta Ferroni、Marco Lucarini、Gian Franco Pedulli、Luca Valgimigli

  DOI：10.1021/jo026501f

  日期：2002.12.1

  A systematic investigation is reported on the regeneration of alpha-tocopherol (alpha-TOH) in homogeneous solution by coantioxidants in order to better understand the mechanism and the factors responsible for the effectiveness of this process. The current availability of thermochemical data concerning the reactants involved in the regeneration reactions, as well as a large number of the kinetic constants for the various reactions involved, allowed us to rationalize the experimental observations collected so far. Three limiting cases have been considered. The first case is that of a coantioxidant irreversibly regenerating (alpha-TOH, where the effectiveness of the recycling process depends on the magnitude of the rate constant k(r). The second case is that of a coantioxidant reversibly recycling alpha-TOH, where regeneration can only be observed if the bond dissociation enthalpy value of the coantioxidant is lower or at least close to that of the O-H bond of alpha-tocopherol. The third case is that of a catechol derivative (chosen as a model compound for polyphenolic antioxidants), where recycling of alpha-TOH is feasible even though the BDE value is significantly higher than that of vitamin E. In this case, the driving force for the recycling process is the removal of the semiquinone radical from the catechol derivative by the alpha-tocopheroxyl radical, which makes the regeneration of alpha-TOH practically irreversible.
• Abnormal Solvent Effects on Hydrogen Atom Abstractions. 1. The Reactions of Phenols with 2,2-Diphenyl-1-picrylhydrazyl (dpph^•) in Alcohols
  作者：Grzegorz Litwinienko、K. U. Ingold

  DOI：10.1021/jo026917t

  日期：2003.5.1

  Rate constants, k(ArOH/dpph.)(s), for hydrogen atom abstraction from 13 hindered and nonhindered phenols by the dipheny picrylhydrazyl radical, dpph., have been determined in n-heptane and a number of alcoholic and nonalcoholic, hydrogen-bond accepting solvents: Abnormally enhanced values of k(ArOH/dpph.)(s) have been observed in alcohols. It is proposed that this is due to partial ionization of the phenols and a very fast electron transfer from phenoxide anion to dpph.. The popular assessment of the antioxidant activities of phenols with dpph. in alcohol solvents will generally lead to an overestimation of their activities.