有机合成在现代工、农业生产中占有相当重要的地位，有机物F是一种高分子化合物，可作增塑剂，H是除草剂的中间产物，它们的合成路线如下：

已知：
① R₁CH=CHR₂  R₁COOH + R₂COOH  （R₁、R₂代表烃基）

（15分）

有机物A的分子式为C₃H₄O₂，下图是A～H 间相互转化的关系图，其中F中含有一个七元环；H是一种高分子化合物。

已知：

①羟基与双键碳原子相连的醇不存在；

②同一个碳原子上连有两个或多个羟基的多元醇不存在。  

请根据以上信息填空：

 ⑴指出下列反应的反应类型：A→C                ；E→G                  。

⑵写出A中含有官能团的结构简式：                                      。

⑶写出C和F的结构简式：C                   ；F                      。

⑷G 中不同化学环境的氢原子有            种。

⑸完成下列反应的化学方程式：

A→H                                                                ；

B→D（第①步）                                                        ；

E→G                                                                 。

（15分）有机物A为芳香烃，质谱分析表明其相对分子质量为92，某课题小组以A为起始原料可以合成酯类香料H和高分子化合物I，其相关反应如下图所示：                                                       
已知以下信息：
①碳烯（:CH₂）又称卡宾，它十分活跃，很容易用它的两个未成对电子插在烷烃分子的C-H键之间使碳链增长。
②通常在同一个碳原子连有两个羟基不稳定，易脱水形成羰基。
回答下列问题：

（1）A的化学名称为         。
（2）由B生成C的化学方程式为                ，该反应类型为          。                                                              （3）G的结构简式为           。
（4）请写出由F生成I的化学方程式                                             。
（5）写出G到H的反应方程式                                       。                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
（6）H的所有同分异构体中，满足下列条件的共有        种；
①含有苯环        ②苯环上只有一个取代基          ③属于酯类
其中核磁共振氢谱有五种不同化学环境的氢，且峰面积比为1:1:2:2:6的是           （写结构简式）。