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A chemistry student five possible Lewis structures for the cyanate ion. Give a reason why structures...

A chemistry student five possible Lewis structures for the cyanate ion.

Give a reason why structures (4) and (5) are wrong. (2)

Calculate the formal charge of each individual atom and determine which structure is the preferred one. (11)

Structure 1

Atom	N	C	O
Valence electrons
Bonding electrons
Nonbonding electrons
Formal Charge

Structure 2

Atom	N	C	O
Valence electrons
Bonding electrons
Nonbonding electrons
Formal Charge

Structure 3

Atom	N	C	O
Valence electrons
Bonding electrons
Nonbonding electrons
Formal Charge

_____________________________________ is the most stable structure.

_____________________________________ is the least stable structure.

Expert Solution

Structure1, Structure 2 and Structure 3 has been drawn in the picture below.

Note: Negative charge on more electronegative atom is more stable. Electronegativity order of atom= O>N>C

So negative charge on Oxygen atom is most stable. So, structure 1 is the most table structure.

As positive charge on more electronegative atom is less stable and in structure 3, there is a positive charge on oxygen atom. So, it will be the least stable structure.

Feel free to ask any doubt in the comment section. Thank you

queen_honey_blossom answered 2 years ago

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