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| ::Thank you for your opinions. It is the certain that I need a first year chemistry book. I think, however, that the concept of bond order is part of ]. In contrast, the concept of resonance is part of ]. When we explain the structure of SO<sub>2</sub> in the context of MO theory, we do not have to use resonance structure. If we consider ]s (e.g. sp<sub>3</sub>d<sub>2</sub>, sp<sub>3</sub>d), we can explain some structures like PCl<sub>5</sub> and SF<sub>6</sub> without using MO theory. But we cannot explain the molecule that has two double bond and 10 valence electrons. This is the reason that I think the image is incorrect. --] (]) 12:49, 11 May 2011 (UTC) | ::Thank you for your opinions. It is the certain that I need a first year chemistry book. I think, however, that the concept of bond order is part of ]. In contrast, the concept of resonance is part of ]. When we explain the structure of SO<sub>2</sub> in the context of MO theory, we do not have to use resonance structure. If we consider ]s (e.g. sp<sub>3</sub>d<sub>2</sub>, sp<sub>3</sub>d), we can explain some structures like PCl<sub>5</sub> and SF<sub>6</sub> without using MO theory. But we cannot explain the molecule that has two double bond and 10 valence electrons. This is the reason that I think the image is incorrect. --] (]) 12:49, 11 May 2011 (UTC) | ||
| ::By the way, when one of the two bonds represents |
::By the way, when one of the two bonds represents a coordinate bond, the structure O=S=O is correct. But O=S=O should not be appear in the resonance theory. --] (]) 13:58, 11 May 2011 (UTC) | ||
Revision as of 13:58, 11 May 2011
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I see you have been editing for a couple of months already, but I thought I would welcome you anyway and say thank you for the improvements you are making to chemistry articles. If you are interested, there is a community of chemists here at Misplaced Pages:WikiProject Chemistry, if you haven't see it already. -- Ed (Edgar181) 13:52, 27 April 2011 (UTC)
- Thank you for your welcome. Nao1958 (talk) 06:23, 5 May 2011 (UTC)
SO2
Just curious, what was the problem with the resonance structures?--Smokefoot (talk) 00:33, 11 May 2011 (UTC)
- Please look at the image.
- I think the two of the sides are correct. The center has the problem. Now, the right oxygen is O1 and the left one is O2. On the left structure, S has one lone pair and O1 has three lone pairs. When the lonepair of S moves to between S and O1, the double bond is formed like the center image. However, the number of valence electrons of O1 is 10. That is against the octet rule. Therefore, the image is incorrect. --Nao1958 (talk) 10:09, 11 May 2011 (UTC)
See File:Sulfur-dioxide-ve-resonance-2D.png for a drawing of what's being discussed here. O=S=O has 10 electrons round sulfur, not oxygen. Oxygen always has 8 electrons round it, in all of these resonance structures. See also Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. pp. 700–701. ISBN 978-0-08-037941-8., where the authors note that the sulfur-oxygen bonds in SO2 have a bond order of at least 2, based on bond length and bond energy. The octet rule is not absolute: see Hypervalent molecule for a discussion. --Ben (talk) 11:44, 11 May 2011 (UTC)
- Yes, the information you are needing is in a first year chemistry book. If you ask on a talk page, you are sure to get some comments on your ideas. As Ben explained, the octet rule is just a rule, not a law.--Smokefoot (talk) 12:34, 11 May 2011 (UTC)
- Thank you for your opinions. It is the certain that I need a first year chemistry book. I think, however, that the concept of bond order is part of molecular orbital theory. In contrast, the concept of resonance is part of valence bond theory. When we explain the structure of SO2 in the context of MO theory, we do not have to use resonance structure. If we consider hybrid orbitals (e.g. sp3d2, sp3d), we can explain some structures like PCl5 and SF6 without using MO theory. But we cannot explain the molecule that has two double bond and 10 valence electrons. This is the reason that I think the image is incorrect. --Nao1958 (talk) 12:49, 11 May 2011 (UTC)
- By the way, when one of the two bonds represents a coordinate bond, the structure O=S=O is correct. But O=S=O should not be appear in the resonance theory. --Nao1958 (talk) 13:58, 11 May 2011 (UTC)