3-methylbenzyl radical | 2348-47-2

• 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: 3-methylbenzyl radical
• 英文别名: m-Xylyl-Radikal
• CAS: 2348-47-2
• 化学式: C₈H₉
• 分子量: 105.159
• InChiKey: GMRODCVDNXSFAA-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.2
• 重原子数：
  8
• 可旋转键数：
  0
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.12
• 拓扑面积：
  0
• 氢给体数：
  0
• 氢受体数：
  0

反应信息

• 作为反应物：
  描述：

  3-methylbenzyl radical 生成 m-xylylene
  参考文献：
  名称：

  HAIDER, K. W.;MIGIRDICYAN, E.;PLATZ, M. S.;SOUNDARARAJAN, N.;DESPRES, A., A. AMER. CHEM. SOC., 112,(1990) N, C. 733-738

  摘要：

  DOI：
• 作为产物：
  描述：

  间二甲苯 在 2,2,6,6-tetramethyl-piperidine-N-oxyl 作用下， 以 various solvent(s) 为溶剂， 生成 3-methylbenzyl radical
  参考文献：
  名称：

  摘要：

  The kinetics of the reaction of the stable radical 2,2,6,6-tetramethylpiperidine-N-oxyl (TEMPO) with a series of alkylarenes containing primary and secondary benzyl C-H bonds was studied by ESR, and the reaction rate constants were determined. The scheme of the process under study was examined, and the applicability boundaries of the simplification during analysis were shown. The selectivities of TEMPO and the more reactive cumylperoxyl radical were compared.

  DOI：

  10.1023/a:1024448309146

文献信息

• Laser photolysis investigation of induced quenching in photoreduction of benzophenone by alkylbenzenes and anisoles
  作者：Katsuji Okada、Minoru Yamaji、and Haruo Shizuka

  DOI：10.1039/a707900a

  日期：——

  by electron transfer (ET) to produce the benzophenone anion (BP-) and corresponding cation (AD+) radicals with efficiencies, αET<1 whereas no chemical species were formed in Bz; and (2) photoreduction of 3BP* by ABs resulted in benzophenone ketyl radical (BPK) formation by benzylic hydrogen abstraction (HA) with efficiencies αHA<1 in Bz and ACN–H2O (4:1 v/v). The residual efficiency (αIQ: 1-αET or

  研究了在苯（Bz）和乙腈（ACN）与水（4：1 v / v）的混合物中烷基苯（AB）和苯甲醚衍生物（AD）淬灭三联体二苯甲酮（3 BP *）的过程。速率常数和效率由295 K处355 nm的纳秒激光闪光光解所确定。我们发现（1）可以控制ACN–H 2 O（4：1 v / v）中的AD使3 BP *失活通过电子转移（ET），以产生二苯甲酮阴离子（BP - ）和相应的阳离子（AD +）与效率自由基，α ET <1，而在的Bz未形成化学物种; 和（2）3的光还原ABs的BP *通过苄基氢提取（HA）导致二苯甲酮酮基（BPK）形成，在Bz和ACN–H 2 O中效率αHA <1 （4：1 v / v）。残留效率（αIQ：1- αET或1- αHA）归因于没有光化学产物的双分子过程，被称为“诱导猝灭（IQ）”。AD和AB的3 BP *的猝灭速率常数（k q）小于Bz和ACN–H 2 O的扩散极限（4：1
• Kinetic Study of the Phthalimide <i>N</i>-Oxyl Radical in Acetic Acid. Hydrogen Abstraction from Substituted Toluenes, Benzaldehydes, and Benzyl Alcohols
  作者：Nobuyoshi Koshino、Basudeb Saha、James H. Espenson

  DOI：10.1021/jo0348017

  日期：2003.11.1

  N-oxyl (PINO) radical was generated by the oxidation of N-hydroxyphthalimide (NHPI) with Pb(OAc)4 in acetic acid. The molar absorptivity of PINO* is 1.36 x 10(3) L mol(-1) cm(-1) at lambda(max) 382 nm. The PINO radical decomposes slowly with a second-order rate constant of 0.6 +/- 0.1 L mol(-1) s(-1) at 25 degrees C. The reactions of PINO(*) with substituted toluenes, benzaldehydes, and benzyl alcohols

  邻苯二甲酰亚胺N-氧基（PINO）自由基是通过在乙酸中用Pb（OAc）4氧化N-羟基邻苯二甲酰亚胺（NHPI）生成的。PINO *在λ（最大）382 nm处的摩尔吸收率为1.36 x 10（3）L mol（-1）cm（-1）。PINO自由基在25摄氏度下以0.6 +/- 0.1 L mol（-1）s（-1）的二级速率常数缓慢分解。PINO（*）与取代的甲苯，苯甲醛和苄醇的反应在氩气气氛下进行了研究。通过Hammett分析将二阶速率常数关联起来。与甲苯和苄醇的反应与sigma +的相关性更好（rho = -1.3和-0.41），与苯甲醛的反应与sigma +的相关性更好（rho = -0.91）。还研究了动力学同位素效应，并获得了相当大的k（H）/ k（D）值：25.0（对二甲苯），27。在25摄氏度下为1（甲苯），27.5（苯甲醛）和16.9（苄醇）。从与对二甲苯和对二甲苯-d（10​​）
• The mechanism of formation of m-xylylene type biradicals produced by photolysis of polymethyl benzenes or dihalomethyl benzenes
  作者：K. W. Haider、E. Migirdicyan、Matthew S. Platz、N. Soundararajan、A. Despres

  DOI：10.1021/ja00158a036

  日期：1990.1

  Par photolyse du mesitylene on obtient le diradical methyl m-xylylene, et par photolyse de l'α,α'-dichloro m-xylene on obtient le diradical m-xylylene

  在钝性双自由基甲基间二甲苯上光解双均三甲苯，在钝性双自由基间二甲苯上光解 l'α,α'-二氯间二甲苯
• Pyrolysis of alkyl benzenes. Relative stabilities of methyl-substituted benzyl radicals
  作者：Barrie D. Barton、Stephen E. Stein

  DOI：10.1021/j100454a007

  日期：1980.8
• One-electron oxidation of alkylbenzenes in acetonitrile by photochemically produced nitrate radical: evidence for an inner-sphere mechanism
  作者：Tiziana Del Giacco、Enrico Baciocchi、Steen Steenken

  DOI：10.1021/j100123a003

  日期：1993.5

  The reaction between NO3. and polyalkylbenzenes was studied using 308-nm laser flash photolysis of cerium(IV) ammonium nitrate in the presence of the alkylbenzenes in acetonitrile solution. For all benzenes, with the exception of monoalkylbenzenes and o- and m-xylene, the reaction with NO3. was found to yield the corresponding radical cations and to proceed in an apparently straightforward bimolecular manner. For monoalkylbenzenes and o- and m-xylene, radicals were seen which are derived from the parents by formal loss of H. from the side chain of the aromatic. This reaction proceeds via a complex between the aromatic and NO3. with the decomposition of the complex being rate determining at higher concentrations of aromatic (rate constants for decomposition between 6 x 10(5) and 4 x 10(7) s-1). In the complex, electron transfer from the aromatic to NO3. is suggested to be concerted with deprotonation of the incipient radical cation. Formation of a complex between NO3. and aromatic is likely even in those cases where radical cations are observed, with the assumption that in these cases the complex decomposition rate is greater-than-or-equal-to 6 x 10(7) s-1.