Oxiranes structure

OXIRANES STRUCTURE AND PROPERTIES, INCLUDING SPECTRA 5.05.2.1 Carcinogenicity and Some Physical Properties... 

The resonance of the C nuclei may be employed extremely well in studies of oxirane structures. From the C spectra for 61 oxiranes an additivity rule was formulated for the chemical shifts. Some examples are given in Table 5. 

Epoxide resins contain the characteristic oxirane structure which can be converted to cross-linked structures in what is known as the curing or hardening reaction. More than 85% of the world production of epoxide resins consists of the bisphenol-A-diglycidyl ether, also known as 2,2-bis(p-glycidyloxyphenyl)propane, which has the idealized structure... 

Epoxide resins contain the characteristic oxirane structure... 

Epoxide (1930) n. Any compound containing the oxirane structure, a three-membered ring containing two carbon atoms and one oxygen atom. The most important members are ethylene oxide and propylene oxide. 

With 3-chloroperbenzoic aci4 the dominant reaction is the formation of oxirane structures, which can react further. Metal carbonyls, e.g. Fe3(CO)i2, react only with cisoid units. Otherwise the metal atoms combine with two different units of the polyacetylene or isomerization occurs, resulting in cis configurations. All these types of reaction have been confirmed by IR spectroscopy. CO insertion can also be observed with molybdenum carbonyls. Cyclo-addition of maleic anhydride (MA) and 3,4-dichloromaleic anhydride (DCMA) leads to adducts like that shown below. The adduct formed by DCMA is worth mentioning because it give rise to fusible polyacetylene (165-80°C) [15]. 

With 3-chloroperbenzoic acid, the dominant reaction is the formation of oxirane structures, which can react further. Metal carbonyls, e.g., Fe3(CO)i2, react only with cisoid units. Otherwise the metal atoms combine with two different units of the poly(acetylene)... 

VO, 2-vinyloxirane and MVO, methyl vinyl oxirane. Structure of EPN is shown in Scheme 10. 

Epoxy additives are used as combination plasticizers and costabilizers. They are formed by oxidation of an olefinic double bond to an oxirane structure by a... 

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