第8题解析:8-1略8-2β-紫罗兰酮的不饱和度是4,C既是它的同分异构体,又是芳香化合物,那么C除了苯环外没有不饱和键,也没有环。C有O元素,又能够催化氢解,它是醚的可能性很高。C只含有一个O,催化氢解生成的物质D要么是烃,要么就是醇(酚),但是因为D只有一种氢原子,所以只好是烃。只有一种H原子的芳香烃,最简单的就是苯环,但是不符合要 Analysis of the 8th: 8-1 slightly 8-2β-ionone has an unsaturation of 4, C is both an isomer and an aromatic compound, then C in addition to the benzene ring has no unsaturated bonds, there is no ring. C has O elements, but also catalytic hydrogenolysis, it is highly likely ether. C contains only one O, which catalyzes the hydrogenolysis of substance D either as a hydrocarbon or as an alcohol (phenol), but because D has only one hydrogen atom, it is only hydrocarbon. Only a H atom of aromatic hydrocarbons, the simplest is the benzene ring, but does not meet the requirements