Question

part 3 of 3
identify the most important resonance structure. select the single best answer.
: n≡n—:s:
:n=n=s:
:n—n≡s:

Explanation:

The most important resonance structure is the one with the least formal - charge separation and the most electronegative atom(s) having a negative formal charge. In the structure :N≡N—S:, nitrogen is more electronegative than sulfur. The triple - bond between the two nitrogen atoms is a very stable bond, and the structure has a reasonable distribution of electrons with the more electronegative nitrogen atoms bearing a more appropriate electron density. In the other structures, there is more formal - charge separation or less favorable distribution of electrons considering electronegativity.

Answer:

:N≡N—S: