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SCAN0093 - met(27l— raglwarloOJrLcfim Kym-”‘3‘...

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Unformatted text preview: met/(27l— raglwarloOJrLcfim Kym-”‘3‘ Wk“ IQ ( Step 2; Hydrogen atom abstraction from methane by a chlorine atom: WM “Xv. ., ,r’“, , :7: + let-CH; "we gm; + i (:8; K; ‘ _ ,L M// (D Chlorine atom Methane en chlcride Methyl radical - " Reaction at methyl radical with molecular chlorine .‘CH; W :Ce + :Ci 1&3; @) Chlorine FIRE cute h-tethyl radical Chlorine atom Claleromethane Almost all of the product is formed by repetitive cycles of th w . top agahon steps Sum of steps 2 and 3 CH4 + C12 W (283$ + HCI Methane Chlorine Chloromethane Hydrcgcn , chloride - —' , (c)Termination Steps - stop chain reaction by consuming free ra lcals. Hardly any product is formed by termination step because concentration of free radicals at any instant is extremely low fr .3 W“: 1 ‘ t r” ‘ *e » . i '. . ,_ « -’§ ® 4C; ‘ "l” ‘ Lu: “NWT, C} - CH3 @. U,\5‘\’ %0 Chlorine atom M31”?! radical Chlotomcthane We 30‘ H50; cw) .. ,2” \ .. @ 35:?“ 4: 'ti‘l: ~————-> C12 Chlorine 4.18 Halogenation of Higher Alkanes 4.1 74.18 Chlorination of Alkanes - can be used to prepare alkyl chlorides from alkanes in which all of the hydrogens are equivalent to one another C9s3> (5Y1 HQ?“ ...
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