6.2炔烃的化学性质 Chemical Properties of Alkynes
Organic Chemistry Organic Chemistry Xiamen Xiamen University University 6.2 炔烃的化学性质 Chemical Properties of Alkynes
621炔烃的酸性 ■末端炔烃酸性比水、醇弱,但比氨强 CH3CH3 CH2-CH2 NH3 CH=CH EtOH H2O K。50 pl 40 35 25 1615.7
Organic Chemistry Organic Chemistry Xiamen Xiamen University University 6.2.1 炔烃的酸 性 末端炔烃酸性比水 醇弱 但比氨强 CH 3 C H 3 CH 2 C H 2 N H 3 CH C H Et OH H 2 O pK a 50 40 3 5 25 1 6 15.7
40 2Na+NH3(i一→2NaNH2+H2 NH3o CH=CH +NaNH,33 CH=CNa NaC≡CNa CH=CH+AgNH3)→AgC=CAg白 eCH=CH+CuNH)→CC=CC山红 RC≡CH+HOBr RC≡CBr+HO
Organic Chemistry Organic Chemistry Xiamen Xiamen University University 2N a + NH 3(liq. ) 2N aNH2 + H2 - 40 CH C H + N aNH2 NH 3(l ) - 33 CH CNa NaNH2 NaC CNa C H C H + Ag (NH 3 ) + AgC CAg 白 C H C H + Cu(NH 3 ) + CuC CCu 红 RC C H + H OBr RC CBr + H2 O
应用 合成 CH, CHoCHBr CH≡CNa CH=≡CCH2CH2CH NanH CH2C≡ CCH,CH2CH (2)CH3 I 鉴别
Organic Chemistry Organic Chemistry Xiamen Xiamen University University 应 用 合成 CH CNa CH 3CH 2CH 2Br CH CCH 2CH 2CH 3 (1) N aN H 2 CH 3C C C H 2CH 2CH 3 (2) C H 3 I 鉴别鉴别
622末端炔烃与醛酮的加成 CHo-O CH≡CH+KOH CH≡C HoO CH≡C-CHO CH≡C-CH2OH KOH 谷CH≡CH+CH3C-CH OH CH3-C-C≡CH CH
Organic Chemistry Organic Chemistry Xiamen Xiamen University University 6.2.2 末端炔 烃与醛酮的加成 CH CH + KO H CH C CH 2 O CH C C H 2 O H 2 O CH C C H 2OH CH CH + CH 3 C C H 3 O KOH CH 3 C CH 3 OH C C H