题目

 We know that many animals do not stay in one place. Birds, fish and other animals move from one place to another at a certain time. They move for different reasons: most of them move to find food more easily, but others move to get away from places that are too crowded. When cold weather comes, many birds move to warmer places to find food. Some fishes give birth in warm water and move to cold water to feed. The most famous migration（迁徙）is probably the migration of the fish, which is called “salmon”. This fish is born in fresh water but it travels many miles to salt water. 结构的研究是有机化学最重要的研究领域，某有机物X（C12H13O6Br）分子中含有多种官能团，其结构简式如下：（其中Ⅰ、Ⅱ为未知部分的结构）。为推测X的分子结构，进行如下图转化：已知向D的水溶液中滴入FeCl3溶液显紫色，对D的结构进行光谱分析，在氢核磁共振谱上显示只有两种信号。M、N互为同分异构体，M中含有一个六原子环，N能使溴的四氯化碳溶液褪色，G能与NaHCO3溶液反应。请回答： （1）D不可以发生的反应有（选填序号）_______   ______；①加成反应    ②消去反应    ③氧化反应    ④取代反应  （2）写出上图转化中生成 M的化学方程式:________________  _________________________________ （3）已知向X中加入FeCl3溶液，能发生显色反应，写出X的一种结构简式:__           ；1mol该 X与足量的NaOH溶液作用，最多可消耗NaOH_____     ______mol。（4）有一种化工产品的中间体W与G互为同分异构体，W的分子中只含有羧基、羟基和醛基三种官能团，且同一个碳原子上不能同时连有两个羟基。写出W的可能结构简式_____         ___。