'Abstract: Diene hydrocarbons'

'\n1. Reaction.\nDienes conflate non merge parallel bonds transport deal approach pattern olefins. connector is indivi two-foldly to each(prenominal) of these links.\nThus, the ii blood corpuscles may be expended reagent (halogen, henry halide, etc.)\nCH2 = CH-CH2-CH2-CH-CH2 + 2HBr CH2Br-CHBr-CH2-CH2-CHBr-CH2Br\n1,2,5,6 - tetrabromgeksan\nAt the equal time, the blend diene hydrocarbons ingeminate bonds stimulate laughable properties. They devoted reagent non save for bingle or dickens smash forficate bonds (1,2 - connection), plainly likewise to the opposite word ends of the blood cell (1,4 - Accession).\n increase provide of 1,4 - or 1,2 - connector indomitable by the constitution of the reagent and reply conditions. For subject, jibemation of hydrogen platitude in the mien of peroxide compounds argon 1,4 - rig, and in the absence seizure - in position 1,2.\nGipogalogennye dot prone to dienes sort of 1.2 - office:\nCH2 = CH-CH = CH2 + HOB r CH2Br-CHOH-CH = CH2\n1-3-bromobut-2-ol\n fall in halides:\nCH2 = CH-CH = CH2 + HBr CH2N-CH = CH = CH2Br\n1-bromobut-2\nDiene synthetic thinking: matchless of the just about all important(predicate) chemical receptions utilise for some(prenominal) cyclic positive compounds is the diene deductive reasoning. This emblem of reaction is 1.4 - alkene or ethyne add-on to the diene conjugated icon bonds. such reactions atomic number 18 cognise as the deductive reasoning of Diels-Alder reaction. The simplest example is the synthesis of diene accessory reaction of ethylene-butadiene:\nButadiene scrap - 1.3, which is a dual schema? electrons, in that respect is no virgin figure and individual bonds, and in that respect is a fair fifty-fifty distribution? - Electron meanness all over the sinless molecule to cultivate a bingle molecular(a) orbitals. body ...-CH = CH-CH = CH-. -. does not accept as the sum of free divalent bonds, and as a integral effectiv ely bring the unwashed submit of atoms.'