sulfur dioxide (二氧化硫)

sulfur dioxide

二氧化硫

sulfur dioxide (二氧化硫)

二氧化硫 (sulfur dioxide)

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electrostatic potential map (靜電電位圖)_sulfur dioxide (二氧化硫)



electrostatic potential map (靜電電位圖)_sulfur dioxide (二氧化硫)

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2. 電負度(electronegativity) ＆ 化學鍵(chemical bond) 的特性：

例：二氧化硫：

電負度：

藉以判斷二氧化硫的氧原子和硫原子的所在位置，由2者的電負度性質可推斷出，因氧的電負度比硫高，所以電子會較喜歡圍繞在它的身邊而使電子密度增加。因此2側紅色區域為氧原子，頂部的藍色區域則為硫原子的位子。

II   化學鍵的特性：

圖形中可看出，在2個極端區域中間都有一層綠色的夾層，這說明電負性的差值不是很大，因此可推斷出二氧化硫的化學鍵極有可能為共價鍵。

Source (資訊來源):

http://highscope.ch.ntu.edu.tw/wordpress/?p=58322
Info cited on 2016-09-03-WD6 (資訊引用於 中華民國105年9月3日) by 湯偉晉 (WeiJin Tang)

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Bond Characteristics 

Electrostatic potential maps can also be used to determine the nature of the molecules chemical bond.  Consider this diagram again:

Source (資訊來源):

http://chem.libretexts.org/@api/deki/files/10124/=746px-Sulfur-dioxide-elpot.png?revision=1

Info cited on 2016-09-03-WD6 (資訊引用於 中華民國105年9月3日) by 湯偉晉 (WeiJin Tang)

There is a great deal of intermediary potential energy, the non red or blue regions, in this diagram. This indicates that the electronegativity difference is not very great. In a molecule with a great electronegativity difference, charge is very polarized, and there are significant differences in electron density in different regions of the molecule. This great electronegativity difference leads to regions that are almost entirely red and almost entirely blue. Greater regions of intermediary potential, yellow and green, and smaller or no regions of extreme potential, red and blue, are key indicators of a smaller electronegativity difference. Note that the electronegativity difference is a key determinant in the nature of a chemical bond. Additionally, sulfur dioxide is characterized by covalent bonds.

Source (資訊來源):

http://chem.libretexts.org/Core/Physical_and_Theoretical_Chemistry/Chemical_Bonding/General_Principles_of_Chemical_Bonding/Electrostatic_Potential_maps

Info cited on 2016-09-03-WD6 (資訊引用於 中華民國105年9月3日) by 湯偉晉 (WeiJin Tang)

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