英语周报 2018-2022 七年级 标 39答案

书面达I'm delighted to know that you are going to ukpart in. Chinese poetry recitation contest. The factthat you are so interested in Chinese culture makes mhappy Now I'd like to offer you some practical adviceFirstly, you should have a better understanding ofwhat you are going to read. Only by doing this can youappreciate its beauty. Secondly, correct your pronuneation by listening to Chinese radio programs because allannouncers speak standard Chinese. What'sgood idea to make some Chinese friends and cote with then as often as possible, which can improve your spoken ChiI hope my opare of help to you and wishyou good luck andYours.Li H

36.(15分)ONa(1)甲基丙二酸(或2-甲基丙二酸)(1分)(1分)醚键、羧基(2分)COOCH3(2)CHyOOCY COOCHw Br CH3CH: ONC0C+HBr(2分)吸收生成的HBr,增大反应的转化率(1分)COOH(2分)(4)取代反应(或水解反应)(1分)(5)3(2分)CH OOCCHCOOCHCHIOH(6)HOOCCH, COOH-CH OOCCH, COOCH浓H2SO1CH, CH-ONaHOOCCHCOOH1)NaOH溶液/△CHOHHOOCCH2CH2OH(3分,其他合理答案也给分)2)H+ONa【解析】由信息推知:A为10oC0oH,B为C为C1ooOm,F为”+mcH为个,1xco化学名称为甲基丙二酸,B的结构简式为00H中官能团的名称为醚键、羧基COOCH通过取代反应生成0~大C0O的化学方程式COOCH为 CHyOOCY COOCHCH3CHONcoOcHHBrCHCH2ONa是一种有机碱,可吸收生成的HBr,增大反应的转化率COOHCOOH(3)由信息中的手性碳为0(4)由E生成F的反应为酯的水解,所以反应类型为取代反应或水解反应(5)D为由信息,其同分异构体中含有酚一OH,根据对称原子,核磁共振氢谱中有4组吸收峰的同分异构体有苯环上连接6个取代基的1种、苯环上连接4个取代基的2种,共3种CH OCCHCOOCH(6)由信息, HOXXCH COH先与CHOH反应保护羧基,再与CHBr2合成CH. BrHOXXCHCOH通过水解反应合成再加热得 HOOCCH CH OH。合成路线为 HOCCH COOHCH OHCH PeCH OOCCHCOOCH1)NOH溶液/△CH OOCCH, COOCHCH ONHOOXCHOOOHHOOCCH CH2OH。CH OH

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