1,1'-(1,3-丙烷二基)二苯 | 4957-14-6

• 物质功能分类: 有机原料 - 烃类化合物及其衍生物
• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 中文名称: 1,1'-(1,3-丙烷二基)二苯
• 中文别名: 二对甲苯基甲烷；二甲苯基甲烷
• 英文名称: 4,4'-dimethyldiphenylmethane
• 英文别名: di-p-tolylmethane；di(4-methylphenyl)methane；bis(4-methylphenyl)methane；bis(p-tolyl)methane；1-methyl-4-(4-methylbenzyl) benzene；4,4’-dimethyldiphenylmethane；1-methyl-4-[(4-methylphenyl)methyl]benzene
• CAS: 4957-14-6；1335-47-3
• 化学式: C₁₅H₁₆
• mdl: MFCD00026018
• 分子量: 196.292
• InChiKey: HZAWPPRBCALFRN-UHFFFAOYSA-N

物化性质

• 熔点：
  29°C
• 沸点：
  150 °C / 10mmHg
• 密度：
  0.98
• 闪点：
  28 °C
• 保留指数：
  1616;1616;1573.2

计算性质

• 辛醇/水分配系数(LogP)：
  4.6
• 重原子数：
  15
• 可旋转键数：
  2
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.2
• 拓扑面积：
  0
• 氢给体数：
  0
• 氢受体数：
  0

安全信息

• 危险等级：
  6.1
• 海关编码：
  2902909090

制备方法与用途

概述

二对甲苯基甲烷是一种烃类化合物，可用作高沸点有机溶剂。

制备方法 通用/典型程序

将10.0 mmol的二芳基甲酮溶解在20 mL甲醇中，并加入200 mg（20%）Pd/C。随后，在室温下于氢气氛搅拌16小时后，减压除去溶剂。产物通过硅胶快速柱色谱纯化，使用戊烷作为洗脱剂。按照上述方法制备的二对甲苯基甲烷产率为94%，得到白色固体。

生产方法

在硫酸存在下，将甲苯与甲醛进行缩合反应，经萃取、中和、蒸馏、过滤，并切取出285～310℃馏分作为产品。

反应信息

• 作为反应物：
  描述：

  1,1'-(1,3-丙烷二基)二苯 在 硝酸 作用下， 生成 甲基硝基苯
  参考文献：
  名称：

  Stephen; Short; Gladding, Journal of the Chemical Society, 1920, vol. 117, p. 525

  摘要：

  DOI：
• 作为产物：
  描述：

  1,1,1-三氯-2,2-二(对-乙基苯基)乙烷 在 氢氧化钾 作用下， 以 二乙二醇 为溶剂， 生成 1,1'-(1,3-丙烷二基)二苯
  参考文献：
  名称：

  Homologs of Diphenylmethane. I. Homologs with an Even Number of Rings

  摘要：

  DOI：

  10.1021/jo01051a074

文献信息

• Generation of Diarylcarbenium Ion Pools via Electrochemical C–H Bond Dissociation
  作者：Masayuki Okajima、Kazuya Soga、Takashi Watanabe、Kimitada Terao、Toshiki Nokami、Seiji Suga、Jun-ichi Yoshida

  DOI：10.1246/bcsj.82.594

  日期：2009.5.15

  The “cation pools” of diarylcarbenium ions have been generated by the low-temperature electrochemical oxidation of diphenylmethane derivatives. In addition to diphenylmethanes having various substituents, 9,10-dihydroanthracene, dibenzosuberane, and xanthenes, which are annulated derivatives of diphenylmethane were also found to serve as a precursor of cation pools. The generation of the diarylcarbenium ion was confirmed by low-temperature NMR analysis and cold-spray mass analysis. Reactivity was also investigated by reactions with various carbon nucleophiles such as allyltrimethylsilane, 1,3,5-trimethylbenzene, and anisole.

  通过二苯甲烷衍生物的低温电化学氧化，生成了二芳基碳正离子"离子池"。除了具有各种取代基的二苯甲烷外，我们还发现9,10-二氢蒽、二苯并苏烯和氧杂蒽等二苯甲烷的稠合衍生物也能作为离子池的前体。通过低温NMR分析和冷喷雾质谱分析证实了二芳基碳正离子的生成。此外，还研究了其与各种碳亲核试剂如烯丙基三甲基硅烷、1,3,5-三甲基苯和茴香的反应活性。
• Facile Protocol for Catalytic Frustrated Lewis Pair Hydrogenation and Reductive Deoxygenation of Ketones and Aldehydes
  作者：Tayseer Mahdi、Douglas W. Stephan

  DOI：10.1002/anie.201503087

  日期：2015.7.13

  A series of ketones and aldehydes are reduced in toluene under H2 in the presence of 5 mol % B(C6F5)3 and either cyclodextrin or molecular sieves affording a facile metal‐free protocol for reduction to alcohols. Similar treatment of aryl ketones resulted in metal‐free deoxygenation yielding aromatic hydrocarbons.

  在H 2下，在5 mol％B（C 6 F 5）3的存在下，一系列甲苯中的酮和醛被还原，环糊精或分子筛提供了一种简便的无金属还原醇的方案。芳基酮的类似处理导致无金属脱氧，生成芳烃。
• Kinetics of the Solvolyses of Benzhydryl Derivatives: Basis for the Construction of a Comprehensive Nucleofugality Scale
  作者：Bernard Denegri、André Streiter、Sandra Jurić、Armin R. Ofial、Olga Kronja、Herbert Mayr

  DOI：10.1002/chem.200500845

  日期：2006.2.8

  series of 21 benzhydrylium ions (diarylmethylium ions) are proposed as reference electrofuges for the development of a general nucleofugality scale, where nucleofugality refers to a combination of leaving group and solvent. A total of 167 solvolysis rate constants of benzhydrylium tosylates, bromides, chlorides, trifluoroacetates, 3,5-dinitrobenzoates, and 4-nitrobenzoates, two-thirds of which have been

  提出了一系列21个苯甲鎓离子（二芳基甲基鎓离子）作为参考电熔剂，用于开发一般的核易性规模，其中核易性是指离去基团和溶剂的组合。甲苯磺酸苄酯，溴化物，氯化物，三氟乙酸盐，3,5-二硝基苯甲酸酯和4-硝基苯甲酸酯的共167个溶剂分解速率常数，在这项工作中已确定其中三分之二，根据相关方程log k（25摄氏度）= sf（Nf + Ef），其中sf和Nf是核反应堆特定的参数，Ef是电堆特定的参数。尽管以这种方式表征的核熔剂和电熔剂覆盖了12个数量级以上，但是只有一组参数，即sf，Nf和Ef，足以计算出25°C时的溶剂分解速率常数，精度为+/- 16％。到目前为止，由于所有核因子的sf大约为1，即离开基团/溶剂的组合，因此对核官能度的定性讨论可以基于Nf。
• Bestimmung der ionenpaar-basizitǎt von lithium- und kaliumamiden
  作者：Hubertus Ahlbrecht、Gunther Scheneider

  DOI：10.1016/s0040-4020(01)82054-8

  日期：1986.1

  Ion pair basicities of lithio and potassio salts of some secondary amines were determined by equilibration with benzyl compounds. With these bases it is possible to span a range of about 19 pK-units from pK = 27 up to 46. The structural dependence of thermodynamic as well as kinetic basicity is discussed. Some new effective amide bases for preparative purposes are recommended. For the first time the

  通过与苄基化合物平衡来确定某些仲胺的硫代和钾代盐的离子对碱性。有了这些基础，就有可能跨越从pK = 27到46的约19 pK单位范围。讨论了热力学以及动力学基础的结构依赖性。推荐用于制备目的的一些新的有效酰胺碱。甲苯的pK值首次通过直接平衡确定。在四氢呋喃中为40.7。
• Flash vacuum pyrolysis over magnesium. Part 1. Pyrolysis of benzylic, other aryl/alkyl and aliphatic halides
  作者：R. Alan Aitken、Philip K. G. Hodgson、John J. Morrison、Adebayo O. Oyewale

  DOI：10.1039/b108663d

  日期：2002.1.23

  Flash vacuum pyrolysis over a bed of freshly sublimed magnesium on glass wool results in efficient coupling of benzyl halides to give the corresponding bibenzyls. Where an ortho halogen substituent is present further dehalogenation gives some dihydroanthracene and anthracene. Efficient coupling is also observed for halomethylnaphthalenes and halodiphenylmethanes while chlorotriphenylmethane gives 4,4′-bis(diphenylmethyl)biphenyl. By using α,α′-dihalo-o-xylenes, benzocyclobutenes are obtained in good yield, while the isomeric α,α′-dihalo-p-xylenes give a range of high thermal stability polymers by polymerisation of the initially formed p-xylylenes. Other haloalkylbenzenes undergo largely dehydrohalogenation where this is possible, in some cases resulting in cyclisation. Deoxygenation is also observed with haloalkyl phenyl ketones to give phenylalkynes as well as other products. With simple alkyl halides there is efficient elimination of HCl or HBr to give alkenes. For aliphatic dihalides this also occurs to give dienes but there is also cyclisation to give cycloalkanes and dehalogenation with hydrogen atom transfer to give alkenes in some cases. For 5-bromopent-1-ene the products are those expected from a radical pathway but for 6-bromohex-1-ene they are clearly not. For 2,2-dichloropropane and 1,1-dichloropropane elimination of HCl occurs but for 1,1-dichlorobutane, -pentane and -hexane partial hydrolysis followed by elimination of HCl gives E,E-, E,Z- and Z,Z- isomers of the dialk-1-enyl ethers and fully assigned 13C NMR data are presented for these. With 6-chlorohex-1-yne and 7-chlorohept-1-yne there is cyclisation to give methylenecycloalkanes and -cycloalkynes. The behaviour of 1,2-dibromocyclohexane and 1,2-dichlorocyclooctane under these conditions is also examined. Various pieces of evidence are presented that suggest that these processes do not involve generation of free gas-phase radicals but rather surface-adsorbed organometallic species.

  在玻璃棉上覆盖一层新升华的镁,进行闪式真空热解,能有效促使苄基卤化物耦合生成相应的联苄。当有邻位卤素取代基存在时,进一步脱卤生成部分二氢蒽和蒽。卤甲基萘和二苯基甲烷也能高效耦合,而三苯基氯甲烷则生成4,4′-双(二苯甲基)联苯。用α,α′-二卤代邻二甲苯可以获得较高产率的苯并环丁烯,而异构的α,α′-二卤代对二甲苯,通过形成的对二甲苯的聚合,可以得到一系列高热稳定性的聚合物。其他卤代烃苯大体上会脱卤化氢,某些情况下能产生环化反应。同样可以观察到,苯基卤代烷烃脱去羰基生成苯乙炔以及其他产物。简单的烷基卤化物则高效地脱去HCl或HBr生成烯烃。脂肪族二卤化物也会发生这一反应生成二烯,但不发生环化反应生成环烷烃,或在某些情况下发生氢原子转移的脱卤反应生成烯烃。5-溴戊-1-烯的产物符合自由基途径的预期,但6-溴己-1-烯并不符合。2,2-二氯丙烷和1,1-二氯丙烷能脱去HCl,但1,1-二氯丁烷、戊烷和己烷则能部分水解,随后脱去HCl,生成E,E-, E,Z-和Z,Z-异构体二烷-1-烯基醚,并且得到了这些物质的13C NMR全归属数据。6-氯己-1-炔和7-氯庚-1-炔能发生环化反应生成亚甲基环烷烃和环炔烃。本文还考察了1,2-二溴环己烷和1,2-二氯环辛烷在上述条件下的行为。本文给出了众多种证据,表明这些反应过程不涉及气相自由基的形成,而是表面吸附的金属有机物种。

表征谱图