AL CHEM ORGANIC
Describe the tests that can be carried out rapidly in a test tube to distinguish the following compounds from one another.
- 魏王將張遼Lv 71 十年前最愛解答
Mixing all of the 3 chemicals with bromine water in the dark. Owing to the unsaturated C=C bond, addition reaction readily occurs for A and B even in the dark while substitution for C cannot proceed.
So C is distinguished.
Mixing A and B with aqueous NaOH and alcohol is formed for B but no reaction for A.
This is because A, vinyl halide (i.e. the halogen group is bonded to either C of C=C bond) has the C atom being less e- deficient, thus NOT susceptible to be attacked by the nucleophile OH- ions.
But for B, The C atom bonded to the Cl atom is more e- deficient and hence it is more readily be attacked by nucleophile since there is no overlapping of p-orbitals as a result of Cl and C of C=C are NOT neighbouring atoms.資料來源： My chemical knowledge