1,2-Di-tert-butylbenzene

The rate of addition is also inversely proportional to the level of congestion. In some cases this depends on whether molecules are being hydrogenated individually or in competition. For example, in competition, 1,3-di-tert-butylbenzene hydrogenates faster than its 1,4-isomer however, individually, the 1,4-isomer hydrogenates faster than the 1,3-isomer. 

The alkylation of 2,4-di-tert-butylphenol with cinnamyl alcohol was carried out in a 25 ml flask with 0.25 mmol 2,4-di-tert-butylphenol (Aldrich) and 0.25 mmol cinnamyl alcohol (Aldrich) using 12.5 ml isooctane as solvent. When the solution was heated and maintained at 60°C, 125 mg catalyst was added. After 6 h s reaction, the catalyst was filtered and extracted with dichloromethane to recover adsorbed reaction products. 1,3 -Di-tert-butylbenzene was used as internal standard and the products were analyzed by GC (HP5890) and GC-MS (HP5890). 

C14H22 1,3-di-tert-butylbenzene 1014-60-4 283.65 27.311 2 27951 C14H30S propyl undecyl sulfide 66826-84-4 276.16 36.146 2... 

We have found that the alkylbenzene derivatives with no hydrogen atom in benzyl positions can act as a mediator to decompose carbonate solvents, as postulated in Fig. 4.20, because they showed a reversible redox reaction and increased the amount of evolved CO without losing themselves. A terf-butylbenzene and 1,3-di-tert-butylbenzene showed lower OCVs compared with toluene, ethylbenzene, and cumene after the overcharge test at 60°C, as shown in Fig. 4.21, which is a good indication as an overcharge protection agent. 

In 1999, Ube Industries, Ltd. discovered that tert-butylbenzene compounds, such as tert-butylbenzene (129), 4-tert-butyltoluene (130), and 1,3-di-tert-butylbenzene (131), can be used as additives in small quantities [127]. In 2000, the same company discovered that halogen-containing tert-butylbenzene compounds [128], such as l-bromo-4-tert-butylbenzene (132), can be used as additives in small quantities, and in 2001 the same company discovered that tert-amylbenzene (133) as well can be used as an additive in small quantities [129]. 

Arenes. n-ButyUithium/potassium tert-butoxide metalates 1,3-di-tert-butylbenzene selectively in the 5-position giving rise to /neta-substituted compounds. 1,4-Di-tert-butylbenzene undergoes metalation in the highly hindered ortho-position. Dimeta-lation of these spiny arenes can be achieved using excess highly concentrated n-BuLi/r-BuOK in hydrocarbon solvents. 

Other polyalkylbenzenes have also been studied 47 54>. 1,2-Di-tert-butylbenzene in ether solution upon irradiation produces a mixture of 1,3- and l,4-di-fer/-butylbenzene 48>. o-tert-Butyltoluene also gives a mixture of the m- and p-isomers but it is less reactive than the di-tert butylbenzene 48>. o- and m-xylene in ether solution gave no detectable isomerization reaction. When a nitro, acetyl or methoxy substituent was placed in the 4-position of the o-di-ferf-butylbenzene, the isomerization reaction did not occur 48>. Using higher intensity light, however, o- and i-xylene were found to isomerize to the other isomeric xylenes 47>. 

Radical cations of hexa-, penta- and tetramethylbenzenes, as well as 1,3,5-tri-and 1,4-di-tert-butylbenzenes have been det ted by ESR in a flow system after inter-.nction with cobalt triacetate in CF3COOH The radical cations of polyfluorinated aromatic compounds proved to be quite stable. Hexafluorobenzene interacted with O2 AsFg in WFj to yield the salt of the hexafluorobenzene radical cation CgF AsFg Octafluoronaphthalene, deca-fluorobiphenyl, hexa-, penta- and 1,2,4,5-tetrafluorobenzenes yield radical cations... 

The products from the thermolyses of other alkyl and aryl azidoformates in 1,4-di-tm-butylbenzene are unpredictable. In some cases, e.g. with cyclopropylmethyl, tert-butyl and 4-methoxyphenyl azidoformates, only the corresponding 3,6-di-/< rt-butyl-l//-azepines are... 

Substituted tert-butylbenzenes behave likewise The complete dealkylation of tert-butylbenzenes under these conditions is due to benzene protonation. In the weaker acid system HF—TaFj, protonated 1,3-di-and 1,3,5-tri-tert-butylbenzenes are formed from tert-butylbenzene, but the (CH3)jC+ cation does not appear... 

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