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Biphenyl (also known as diphenyl, phenylbenzene, 1,1′-biphenyl, lemonene [4] or BP) is an organic compound that forms colorless crystals. Particularly in older literature, compounds containing the functional group consisting of biphenyl less one hydrogen (the site at which it is attached) may use the prefixes xenyl or diphenylyl .
The degree of polymerization may be as low as 0.1. [9] The epoxide content of such epoxy resins is of interest. This parameter is commonly expressed as the epoxide number , which is the number of epoxide equivalents in 1 kg of resin (Eq./kg), or as the equivalent weight, which is the weight in grams of resin containing 1 mole equivalent of ...
The bisphenols (/ ˈ b ɪ s f ɪ n ɒ l /) are a group of industrial chemical compounds related to diphenylmethane; commonly used in the creation of plastics and epoxy resins. [ 1 ] [ 2 ] [ 3 ] Most are based on two hydroxyphenyl functional groups linked by a methylene bridge .
The synthesis of BPA still follows Dianin's general method, with the fundamentals changing little in 130 years. The condensation of acetone (hence the suffix 'A' in the name) [ 33 ] with two equivalents of phenol is catalyzed by a strong acid, such as concentrated hydrochloric acid , sulfuric acid , or a solid acid resin such as the sulfonic ...
Diphenylmethane is an organic compound with the formula (C 6 H 5) 2 CH 2 (often abbreviated CH 2 Ph 2). The compound consists of methane wherein two hydrogen atoms are replaced by two phenyl groups. It is a white solid. Diphenylmethane is a common skeleton in organic chemistry. The diphenylmethyl group is also known as benzhydryl.
Dihydroxybiphenyl (as known as biphenol) refers to a class of organic compounds consisting of a biphenyl structure with two hydroxyl groups attached. The most common isomers are 2,2'-dihydroxybiphenyl and 4,4'-dihydroxybiphenyl.
The industrial synthesis of 4,4′-biphenol was developed by Allan Hay in the 1960s. [ 2 ] [ 3 ] As the direct oxidative coupling of phenol gives a mixture of isomers, [ 4 ] [ 5 ] 4,4′-biphenol is instead prepared from 2,6-di-tert-butylphenol , where para-coupling is the only possibility. [ 3 ]
Bromobenzene is used to introduce a phenyl group into other compounds. One method involves its conversion to the Grignard reagent , phenylmagnesium bromide . This reagent can be used, e.g. in the reaction with carbon dioxide to prepare benzoic acid . [ 4 ]