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Chemistry
What is the Lewis structure of C3H5+ ion?
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[QUOTE="ArjenB, post: 5666529, member: 602489"] Hi, For school, I have to give the Lewis structure of C[SUB]3[/SUB]H[SUB]5[/SUB][SUP]+[/SUP] ion. There is a method explained, which is fairly easy, and has always worked. It has also worked for ions. However, this is the first time I have to give the Lewis structure of a positive ion.The valence of the C atom is 4 electrons, and 1 electron for the H atom. In order to meet the octet rule, the C atom needs 8 electrons, and the H atom needs 2 electrons. According to the method that is given, the amount of pairing electrons can be calculated by substracting the amount of valence electrons from the amount of electrons that are needed to meet the octet rule. I have learned to add electrons for a negatively charged ion, so I concluded I will have to substract electrons in a positive ion. So here I will have to substract 1 electron from the amount of valence electrons, due to the positive charge of 1+. Correct? So I thought: Valence electrons = 3C + 5H - 1 = 3 * 4 + 5 * 1 - 1 = 16 electrons Electrons to meet octet rule = 3 * 8 + 5 * 2 = 34 electrons So the ion is 18 electrons short. I have been told that these electrons will form bonds. So there are 18/2 = 9 electron bonds, so there should be a total of 9 bonds between all the atoms. Then I looked up the lewis structure for this ion, and there are a total of 8 bonds in the ion, and not 9. Where have I gone wrong here? This method has always worked so far... [/QUOTE]
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What is the Lewis structure of C3H5+ ion?
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