Understand Lewis Dot Structures: Cl F & Triple Bonds

[Shay10825]

so would it be
$$\overline{N}=\overline{O}\cdot$$

 

[Gokul43201]

If you're sure it's [itex]NO^{2+} [/tex], then, yes, that is one possibility. <br /> <br /> However, it's not the best one.<br /> <br /> Explanation : NO^(2+) has 5+ 6 - 2 = 9 valence electrons, which is an odd number. You can not make two octets out of an odd number of electrons. So, one of the two atoms must necessarily settle for a non-octet configuration. <br /> <br /> Here's another possibility. Tell me if you think it's better or worse, and why.<br /> <br /> $$(+)~~\cdot N \equiv \overline {O}~~(+)$$[/itex]

 

[Shay10825]

oh well. I give up. I'll finish working on this stuff tomorrow. Thanks everyone for your help . It's extremely late over here and I need to go to bed. :zzz:

 

[Shay10825]

That would be better because the bond is stronger? A triple bond is better than a double. So for some of them there are many answers?

 

[dextercioby]

Okay,Gokul,you're right:In this formula $$NOF_{2}$$ with the Lewis structure:

$$\cdot$$​

$$|\overline{\underline{F}}-N=\overline{O}|$$​

|​

$$|\underline{F}|$$​

The total number of electrons is as it should be:25 and the oxydation number of nytrogen is +4,which means that the "NO" combination has the ON "+2".

I believe they are called "mesomeric" structures and have been discovered by Linus Pauling in the early 1930's.

Daniel.

 

[Gokul43201]

No, it's better because O gets an octet. Yes, sometimes there are multiple answers, and the actual structure is a resonance of the different possibilities. This is true if the different answers are equally good. However, here, there is one solution that is better than others, so it must be chosen.

Too late here too ...g'night !

 

[Gokul43201]

Okay,Gokul,you're right:In this formula $$NOF_{2}$$ with the Lewis structure:

$$\cdot$$​

$$|\overline{\underline{F}}-N=\overline{O}|$$​

|​

$$|\underline{F}|$$​

The total number of electrons is as it should be:25 and the oxydation number of nytrogen is +4,which means that the "NO" combination has the ON "+2".

I believe they are called "mesomeric" structures and have been discovered by Linus Pauling in the early 1930's.

Daniel.

Dexter, this lends naturally to another solution :

$$(2+) ~~ \cdot N = \overline{O} |$$

 

[dextercioby]

And i believe that oxygen looks pretty good:no triple bond,no "forced" octet...Poor nytrogen,stripped of two electrons...


Daniel.