[高中] 奈(草字頭)的鍵級
一本參考書說奈(草字頭，打不出來，抱歉)C10H8
它的C-C鍵級和苯一樣是1.5，但請看以下摘自維基百科的描述
http://en.wikipedia.org/wiki/Naphthalene
Unlike benzene, the carbon-carbon bonds in naphthalene are not of the
same length. The bonds C1–C2, C3–C4, C5–C6 and C7–C8 are about
1.36 A (136 pm) in length, whereas the other carbon-carbon bonds are
about 1.42 A (142 pm) long. This difference, which was established by
x-ray diffraction[citation needed], is consistent with the valence bond
model of bonding in naphthalene that involves three resonance structures
(as shown below); whereas the bonds C1–C2, C3–C4, C5–C6 and C7–C8 are
double in two of the three structures, the others are double in only one.
意思是有四個C-C鍵比較短，其它7個C-C鍵比較長，
而這樣的長短也反應在它的三個共振結構中：
四個較短的鍵出現兩次雙鍵，而其它7個的雙鍵只出現一次。
我覺得這意思應該就是奈的C-C鍵級不是1.5，請大大賜教。
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10/18 23:04, , 1F
10/18 23:04, 1F
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