In inorganic chemistry and especially in binary compounds they have the habit to use an order based on electronegativity: the least electronegative element being cited first.
- Sulfur hexafluoride: SF
- Ammonia: NH
- Calomel: HgCl
- Diborane: BH
As correctly commented by Eric Ressner Ammonia does not follow the simple electronegativity rule: electronegativity of nitrogen is 3.0 hydrogen is 2.2 (Linus Pauling scale).
So I double checked the guidance: the correct element sequence is ‘inspired by’ electronegativity, but with a few exceptions. This is detailed in Table VI (p 260 of the red book):
So I double checked the guidance: the correct element sequence is ‘inspired by’ electronegativity, but with a few exceptions. This is detailed in Table VI (p 260 of the red book):
By convention, the later an element occurs when the table is traversed following the arrows, the more electropositive is the element.
Hydrogen is placed on top of Nitrogen. So NH is following the ‘rule’.
Thank you
ReplyDeleteIt was really useful... Thank you so much 🙏👍
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