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chemistry cis and trans

圖片參考:http://imgcld.yimg.com/8/n/HA01132001/o/2013041317...

I want to ask is this two cis- and trans- wrong? Since the CH3 is on the same side but it is trans, the CH3 is on different sides but it's cis-, please help me~~~~

1 個解答

評分
  • ?
    Lv 7
    8 年前
    最愛解答

    There are one -CH3 group and one H atom on the left, the -CH3group has a higher atomic number.

    There are one -CH2CH3 group and one -CH3 groupon the right, the -CH2CH3­ group has a higher atomicnumber.

    The isomer on the left hand side :

    The two groups of higher atomic number (i.e -CH3 on the left and -CH2CH3on the right) are both on the same side. Hence, it is a cis- isomer.

    The isomer on the right hand side :

    The two groups of higher atomic number (i.e. -CH3 on the left and-CH3CH3 on the right) are on the opposite sides. Hence,it is a trans- isomer.

    資料來源: wanszeto
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