Question

Am aflat ca formula moleculara este C5H8 dar vreau reactiile. Dau 50 de puncte

Answer 1

C5H8  poate sa fie 1-pentina

HC≡C-CH2-CH2-CH3 + Br2 => Br-HC=C(Br)-CH2-CH2-CH3 + Br2=>
=>(Br)2-HC-C(Br)2-CH2-CH2-CH3 (in CCl4)

HC≡C-CH2-CH2-CH3 + 2 H2 => HC=CH-CH2-CH2-CH3 + H2=>
=> H3C-CH2-CH2-CH2-CH3 (pe catalizator de platina sau Nichel Raney)

n HC≡C-CH2-CH2-CH3 => -(HC=C-CH2-CH2-CH3)n- (polimerizare)

HC≡C-CH2-CH2-CH3 + 5 [O] => CH3-CH2-CH2-COOH + CO2 + H2O
(in mediu puternic acid H2SO4 conc. + KMnO4; este oxidare energica, iar la alchinele marginale se formeaza initial acid formic care in conditiile de reactie date se oxideaza pana la CO2 si H2O)