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分析化学最低浓度计算题(A-Level化学例题解析及练习Isomers)

分析化学最低浓度计算题(A-Level化学例题解析及练习Isomers)红线部分为longest straight chain.Q的skeletal formula数有几个顶点,即有几个C. (共有10个顶点,10个C),longest straight chain上有7个C, branch(从右往左数)在C1 (methyl) C2 (methyl)和C4 (methyl)上Which structure is a structural isomers of Q?解析:答案DStructural isomer: compounds with the same molecular formula but different structural formulae.

分析化学最低浓度计算题(A-Level化学例题解析及练习Isomers)(1)

知识点:Isomers

例题:

Kerosene is used as an aircraft fuel. Q is one of the molecules in kerosene and has the skeletal formula shown.

分析化学最低浓度计算题(A-Level化学例题解析及练习Isomers)(2)

Other structural isomers of this molecule are also found in kerosene.

Which structure is a structural isomers of Q?

分析化学最低浓度计算题(A-Level化学例题解析及练习Isomers)(3)

解析:答案D

Structural isomer: compounds with the same molecular formula but different structural formulae.

Q的skeletal formula数有几个顶点,即有几个C. (共有10个顶点,10个C),longest straight chain上有7个C, branch(从右往左数)在C1 (methyl) C2 (methyl)和C4 (methyl)上

分析化学最低浓度计算题(A-Level化学例题解析及练习Isomers)(4)

红线部分为longest straight chain.

选项A也有10个顶点,molecular formula相同;longest straight chain上(从左往右数)有7个C, branch在C1 (methyl) C2 (methyl)和C4 (methyl)上,选项A和Q structural formula相同。

选项B有9个顶点,molecular formula不同。

选项C有11个顶点,molecular formula不同。

选项D有10个顶点,molecular formula相同。longest straight chain上(从左往右数)有7个C, branch在C2 (isopropyl)上,选项D和Q structural formula不同。

所以选D.

下面我们为大家准备了一道同类型的题目,请大家一起来试试解答。

分析化学最低浓度计算题(A-Level化学例题解析及练习Isomers)(5)

答案: D

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