Consider the molecule formed by the reaction of SO2 and NH3 (analogous to the example of sulfamic acid discussed in class)

5. Consider the molecule formed by the reaction of SO₂ and NH₃ (analogous to the example of sulfamic acid discussed in class). Predict the structure and bonding properties of the reaction product.

As in the SO₃–NH₃, the anticipated structure is zwitterionic because of resonance stabilization. However, since the negative charge is only spread out over 2 O atoms, the charge-neutral structure may be quite close in energy. The two resonance structures to the right should be a little lower in energy since the more electronegative O atom bears the negative charge. Both the S and N centers should have approximately 109^o bond angles, but the O-S-O and O-S-N angles should be reduced a couple of degrees because of the lone-pair/bond-pair repulsion.