(2) aromatic structure of benzene from the point of view, having a planar ring structure of benzene, average bond length completely, hydrocarbon ratio of 1. Judging from the nature of the use of propylene glycol methyl ether, benzene having exceptional stability: heat hydrogenation of cyclohexene ΔH = -120kJ / mol, 1,3- cyclohexadiene hydrogenation heat ΔH = -232kJ / mol (due to its co conjugated double bonds increases its stability). The hydrogenation of benzene heat ΔH = -208kJ / mol. A propylene glycol methyl ether, when 3- cyclohexadiene lose two hydrogen into benzene, not only do not endothermic, but release a small amount of heat. This shows that: benzene than the corresponding cyclohexanone trienes much more stable, from 1,3-cyclohexadiene become benzene, molecular structure has been radically changed, and led to the formation of a stable system. Benzene is difficult to oxidation and bonus, and prone to electrophilic substitution reactions of propylene glycol monomethyl ether market, and the nature of ordinary olefins significantly different. Benzene also has a special spectral characteristics. Hydrogen on the benzene ring in the low-field NMR. These characteristics explain the benzene has a typical aromatic characteristics. Hydroxyl group is a strong activating group, which can be seen from the following experimental facts: the phenol containing a small amount of (phenol) in a test tube was added dropwise a solution of excess concentrated bromine water, and soon there tribromophenol white precipitate. This reaction can be used to identify phenol. Thus preparing a bromophenol usually carried out in an inert solvent, an inert solvent where the dilution effect from the sales glycol methyl ether, and the reaction is easy to control unary stage. E.g., p-bromophenol is usually carried out in carbon disulfide solvent. Preparation of bromoaniline aniline are generally first acetylated, this aspect can be reduced ability to activate an amino group of a benzene ring, at the same time due to the steric hindrance acetylamino larger, can prevent the entry after the amino group into the ortho position, and to obtain para-product, after the completion of the reaction, an acetyl group can be removed by hydrolysis. Xiang dry chemical (Figure) | methoxypropylacetate Price | Fujian methoxypropylacetate provided by Jinan Chemical Co., Ltd., Cheung dry. Jinan Cheung Dry Chemical Co. (www.xiangqianhuagong.com) (www.dilunyierchun.com) adhere to the "people-oriented" business philosophy, has a professional staff, and strive to provide the best products and services to contribute to the community, and welcome to new and old customers to visit us and sincere cooperation for a better future. Xiang dry chemical - your trusted friend, Company Address: Industrial Road chemical market, Contact: Mr. You can also access (www.dilunyierchun.com/supply_details_48096905.html), for more information about the company.