Chapter 9, Problem 53IL

The sulfamate ion, H₂NSO₃^–, can be thought of as having been formed from the amide ion, NH₂^–, and sulphur trioxide, SO₃.

(a) What are the electron-pair and molecular geometries or the amide ion and or SO₃? What are the hybridizations of the N and S atoms, respectively?

(b) Sketch a structure for the sulfamate ion, and estimate the bond angles.

(c) What changes in hybridization do you expect for N and S in the course of the reaction

NH₂^– + SO₃ → H₂N—SO₃^–?

(d) Is SO₃ the donor of an electron pair or the acceptor of an electron pair in the reaction with amide ion? Does the electrostatic potential map shown below confirm your prediction?