А - CH3-CH(CH3)CH2-CH3
B - CH3-C(CH3)-CH2-CH3
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Br
C - CH3-C(CH3)=CH-CH3
Объяснение:1) CH3-CH(CH3)CH2-CH3 + Br₂(hv) → CH3-(Br)C(CH3)-CH2-CH3 + HBr
2) CH3-(Br)C(CH3)-CH2-CH3 + Na(OH)(спирт.) → CH3-(CH3)C=CH-CH3 + NaBr + H₂O
3) 3CH3-C(CH3)=CH-CH3 + 2KMnO4 + 3H₂O → 3CH3-(CH3)C(OH)-CH(OH)-CH3 + 2MnO2 + 2KOH
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OH CH₃ OH OH
2-метилпентантриол-1,3,5
СН₂ - СН₂ - СН₂ - СН - СН₂ - СН₂ - СН₂
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OH OH OH
гептантриол-1,4,7