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Thermochemistry, Electrochemistry, and Solution Chemistry
Published in W. M. Haynes, David R. Lide, Thomas J. Bruno, CRC Handbook of Chemistry and Physics, 2016
W. M. Haynes, David R. Lide, Thomas J. Bruno
Cyclohexanone Cyclohexene Cyclooctane cis-Cyclooctene Cyclopentane Cyclopentanol Cyclopentanone Cyclopropane Dibromomethane Dibutylamine Dibutyl ether o-Dichlorobenzene m-Dichlorobenzene p-Dichlorobenzene 2,3-Dichloro-1,1'-biphenyl 2,4-Dichloro-1,1'-biphenyl 2,5-Dichlorobiphenyl 2,4'-Dichloro-1,1'-biphenyl Dichlorodi uoromethane 2,2-Dichloro-1,1-di uoro-1methoxyethane 1,1-Dichloroethane 1,2-Dichloroethane 1,1-Dichloroethene cis-1,2-Dichloroethene trans-1,2-Dichloroethene Dichloromethane 1,2-Dichloropropane, ()1,3-Dichloropropane 1,2-Dichloro-1,1,2,2-tetra uoroethane 1,2-Diethoxyethane Diethylamine N,N-Diethylaniline p-Diethylbenzene Diethylene glycol dimethyl ether Diethyl ether Diethyl sul de 1,1-Di uoroethane Di uoromethane Diiodomethane Diisopropyl ether 1,2-Dimethoxyethane Dimethylamine 2,4-Dimethylaniline 2,5-Dimethylaniline 2,6-Dimethylaniline N,N-Dimethylaniline 2,3-Dimethylbutane 3,3-Dimethyl-2-butanone cis-1,2-Dimethylcyclohexane trans-1,2-Dimethylcyclohexane Dimethyl ether N,N-Dimethylformamide 2,4-Dimethyl-3-pentanone 2,3-Dimethylpyridine 2,4-Dimethylpyridine 2,5-Dimethylpyridine 2,6-Dimethylpyridine 3,4-Dimethylpyridine 3,5-Dimethylpyridine Dimethyl sul de
Chemical, Physical, Hazardous and Toxicological Properties of EPA’s Air Toxics
Published in Lawrence H. Keith, Mary M. Walker, Handbook of Air Toxics, 2020
Lawrence H. Keith, Mary M. Walker
The last correction has serious consequences because N,N-Dimethylaniline (CAS # 121-69-7) is a different compound from N,N-Diethylaniline (CAS # 91-66-7). The Clean Air Act Amendment, as published in the Federal Register lists the above compound as “N,N- Diethylaniline (N,N-Dimethylaniline)” with a CAS # of 121-69-7. Clearly the letter “m” was omitted as a typo thus changing the compound name. Because of the confusion caused by this error we have included chemical and physical properties for both of these compounds, thus increasing the number of records in this database from 189 to 190.
Zinc(II) complexes containing N′-aromatic group substituted N,N′,N-bis((1H-pyrazol-1-yl)methyl)amines: Synthesis, characterization, and polymerizations of methyl methacrylate and rac-lactide
Published in Journal of Coordination Chemistry, 2018
Sujin Shin, Hyungwoo Cho, Hyosun Lee, Saira Nayab, Younghak Kim
1H-pyrazole, para-formaldehyde, 3,5-dimethylaniline, 2,6-dimethylaniline, 2,6-diethylaniline, 2,6-diisopropylaniline, 4-bromoaniline, benzhydrylamine, magnesium sulfate (MgSO4), anhydrous [ZnCl2] and methyl methacrylate (MMA) were purchased from Sigma-Aldrich (St. Louis, MO) and anhydrous solvents, such as C2H5OH, DMF, hexane, and CH2Cl2 were purchased from Merck (Darmstadt, Germany) and used without further purification. Modified methylaluminoxane (MMAO) was purchased from Tosoh Finechem Corporation (Tokyo, Japan) as 5.9% aluminum (by weight) in a toluene solution and used without further purification. 1H-pyrazolyl-1-methanol, as starting material, was prepared according to the reported method [11]. The synthesis of LA − LE was carried out as reported previously [34–38].
Halogenation of arenes with sulfoxide and oxalyl halide
Published in Journal of Sulfur Chemistry, 2023
Kaishuo Zhao, Tong Chen, Hao Wang, Yongguo Liu, Sen Liang, Baoguo Sun, Hongyu Tian, Ning Li
The above results indicate that the combination of DMSO and oxalyl bromide as a brominating reagent display notable sensitivity to both electronic and steric effects. Specifically, it was observed that monosubstituted activated arenes typically yielded single monobrominated products (entries 1–6 except entry 3, Table 2), whereas toluene 8 or methyl benzoate 9 with a weak activating group or a deactivating group did not undergo bromination (entries 7 and 8, Table 2). Moreover, the bromination of N-acetylaniline 6 was more difficult compared with N,N-dimethylaniline 4 and N,N-diethylaniline 5 (entry 5 versus entries 3 and 4, Table 2), and even with an excess of reagents, the yield of brominated product 6’ was relatively low, with approximately 20% of N-acetylaniline remaining (entry 5, Table 2). Phenols with weak deactivating halogen groups (entries 10 and 11, Table 3) did not show reactivity either. Compared with toluene, the bromination of 1,3,5-trimethylbezene 21 went well to produce the brominated product 21’ in a good yield (entry 1, Table 4). These results suggested that only arenes possessing sufficiently high electron density can be brominated with DMSO/(COBr)2, and that the introduction of bromine deactivated the arene to certain extent that prevents further bromination. Steric factors were also observed to have an obvious effect on the bromination of arenes with DMSO/(COBr)2. For example, the bromination of N,N-dimethylaniline 4 with 1.2 equiv. of reagents produced a trace amount of 2,4-dibromo-N,N-dimethylaniline (entry 3, Table 2), whereas no 2,4-dibromo-N,N-diethylaniline was observed under the same conditions for the reaction of N,N-diethylaniline 5, (entry 4, Table 2). This outcome was likely due to the steric hindrance imposed by the ethyl groups, which prevented bromination in the ortho positions. In addition, compared with para disubstituted phenols (entries 1-3, Table 3), 1,4-dimethoxybenzene 13, 4-methyl-N,N-dimethylaniline 14, and p-bromo-N,N-dimethylaniline 15 showed lower reactivity in the ortho position (entries 4-6, Table 3), which can be ascribed to the relatively more bulky substituted groups compared with hydroxy group of the phenols. The difference in reactivity between p-bromo-N,N-dimethylaniline 15 and o-bromo-N,N-dimethylaniline 18 demonstrated that the bromination in the para position, where less steric hindrance is present, proceeded much more readily (entries 6 and 9, Table 3). Likewise, the bulky isopropyl group of 1,3,5-triisopropylbenzene 23 caused the relatively poor yield of bromination (entry 3, Table 4).