1.4- Dichlorobenzene 1,4-DCB

Due to the commercial availability of EMME in good purity, there has not been a need to develop new methods to prepare 3-anilino-acrylates therefore, only a few alternatives have been reported. One approach described thermal carbene generation from 37, and rearrangement to form 38. Cyclization in refluxing 1,2-dichlorobenzene (1,2-DCB) provided the 2, 3, 4-trisubstituted quinolines. An electron-withdrawing group (EWG) on the carbene carbon was required for this reaction, and therefore led to the EWG substitution in the 2-position of the quinoline. 

Somebody bets you that at 60°C, the vapor pressure of 1,2-dichlorobenzene (1,2-DCB) is smaller than that of 1,4-dichlorobenzene (1,4-DCB), but that at 20°C, the opposite is true that is, p (1,2-DCB, 20°C) > p (1,4-DCB, 20°C). Is this person right If yes, at what temperature do both compounds exhibit the same vapor pressure Try to answer these questions by using only the Tm and Tb values given in Appendix C. 

Masten et al. (1996) investigated the oxidation of chlorinated benzenes such as 1,2-dichlorobenzene (1,2-DCB), 1,3,5-trichlorobenzene (1,3,5-TCB), and pentanoic acid (PA). TCB is often generated as a by-product of pesticide manufacturing, while DCB is commonly manufactured as an insecticide or a fumigant for industrial odor control. Due to their resistance to biological treatments, PA is usually nonreactive with ozone but can react with hydroxyl radicals (Masten et al., 1996). 

DNAPLs examined include chlorobenzene (CB), 1,2-dichlorobenzene (1,2-DCB), trichloroethylene (TCE) and tetrachloroethylene (PCE). These DNAPLs were selected because of their relevance as environmental contaminants, and because they cover a range of polarities and densities. All DNAPLs were purchased from Sigma (St. Louis, MO) and were used as received. 

An example of solid-phase microwave synthesis where the use of open-vessel technology is essential is shown in Scheme 4.10. The transesterification of /3-keto esters with a supported alcohol (Wang resin) is carried out in 1,2-dichlorobenzene (DCB) as a solvent under controlled microwave heating conditions [22], The temperature is kept constant at 170 °C, ca. 10 degrees below the boiling point of the solvent, thereby allowing safe processing in the microwave cavity. In order to achieve full conversion to the desired resin-bound /3-keto ester, it is essential that the methanol formed can be removed from the equilibrium [22]. 

For example, many microwave-assisted solid-phase coupling reactions utilize l-methyl-2-pyrrolidone (NMP) or 1,2-dichlorobenzene (DCB) as the reaction solvent. The main reason for this is the high thermal stabilities of these solvents and their... 

The molybdenum(II) carboxylates, Mo2(02CR)4, are key derivatives containing molybdenum-molybdenum quadruple bonds.1 First described by Wilkinson and coworkers in the early 1960s,2 they remain the key starting materials in (Mo2)4 + chemistry and they have been the objects of numerous physical and theoretical studies.1 The most commonly used method of preparation is the reaction between molybdenum hexacarbonyl and a carboxylic acid in an inert solvent such as 1,2-dichlorobenzene (DCB) [eq. (I)].3 Excellent yields of Mo2(02CR)4 can be obtained by... 

Therefore, we may not be too surprised to find that nonionic chemicals show increasing solid-water distribution ratios for soils and sediments with increasing amounts of natural organic matter. This is illustrated for tetrachloromethane (carbon tetrachloride, CT) and 1,2-dichlorobenzene (DCB) when these two sorbates were examined for their solid-water distribution coefficients using a large number of soils and sediments (Fig. 9.7, Kile et al., 1995.)... 

Figure 9.8 Frequency diagrams showing the variability in the log Kioc values of (a) tetrachlorome-thane (CT) and (b) 1,2-dichlorobenzene (DCB) for 32 soils (dark bars) and 36 sediments (light bars). The range offoc values of the soils and sediments investigated is indicated in Fig. 9.7. Data from Kile et al. (1995).

In this work extraction models are developed for three different particle geometries using the shrinking core concept. Model calculations will be compared and fitted to extraction data of toluene and 1,2 dichlorobenzene (DCB) from shallow packed beds in order to obtain values of the efective diffusivity (De) and the tortuosity factor. 

Liu et al.24 have observed experimentally that the devices spun with aromatic solvents have a significantly higher current than those spun with nonaromatic solvents. Shown in Fig. 6.9 are the current-voltage (I-V) curves of a device spun with 1,2-dichlorobenzene (DCB) and a device spun with THF. Although these devices have the same film thickness ( 130 nm), the former has much higher current than the latter at the same operating voltage. For example, at 4 V the current of the device spun with DCB reaches 13 mA, whereas that of the device spun with THF is only 2 mA. 

Synonyms/Trade Names o-DCB 1,2-Dichlorobenzene ortho-Dichlorobenzene o-Dichlorobenzol... 

Synonyms cas 95-50-1 i,2-dichlorobenzene chloroben chloroden dcb termitkil p-Dichlorobenzene... 

Diels-Alder cycloaddition of pyrazinone 687 with ethene in the presence of 1,2-dichlorobenzene (DCB) under MWI gave the bicyclic cycloadducts 688 in 86-89% yields within 40-140 min (Scheme 132). Under conventional heating, these reactions were carried out in an autoclave for 12 h (02JOC7904). 

In comparison with bulk polymerization, for the free radical reaction of VK in the presence CNTs, PVK was reacted directly with MWNTs at 70 °C in DCB with azo-bis-izobutyronitrile (AIBN) as the radical initiator [199]. After purification, deep-grey products, which can be dissolved in common solvents such as chloroform and 1,2-dichlorobenzene (DCB), were obtained. It was confirmed that PVK was grafted onto the surface of CNTs by FTIR and Raman spectroscopy, CPS, TGA, TEM, and UV-VIS spectra [199]. 

Synonyms Benzene, o-dichloro- Chloroben Chloroden Cloroben DCB o-Dichlorbenzene o-Dichlorbenzol 1,2-Dichlorobenzene Dizene ODB ODCB Orthodichlorobenzene Orthodichlorobenzol Empiricai C6H4CI2... 

Dichlorobenzene (DCB, o-Dichlorobenzene, ODB, Orthodichlorobenzene), C(,H4Cl2, is a colorless to pale yellow liquid with a pleasant aromatic odor. It is a combustible liquid and can form explosive mixtures with air at or above 151"F. Combustion and thermal decomposition products include hydrogen chloride gas, phosgene and chloro-carbons. Its flammable (explosive) limits are as follows Lower 2.2%, Upper 9.2%. 

Abbreviations DMSO - dimethyl sulfoxide DMAC -dimethylacetamide DMF - dimethylformamide THF -tetrahydrofuran DCB - 1,2-dichlorobenzene. 

Solid polyethylene pieces are mixed with lupersol 130 (LPO) and maleie anhydride and reacted at 120°C in 1,2- dichlorobenzene (DCB) solvent The resultant polymer is then mixed and extruded with OPS. Elaborate what precisely would happen in the extrader. Write down the meehanism of the reaction occurring in DCB. The initiator LPO is a solution of 2,5-di(/-butylperoxy)-2,5-dimethyl-3-hexyne with a half-Ufe of about 12 min at 165°C. 

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