(a) What would you predict would happen when equimolar amounts of NaN₃ and NaNO₂ react in acidic solution? How would you attempt to confirm your prediction?

(b) POCl₃ reacts with an excess of Me₂NH to yield compound A as the only phosphorus-containing product; compound A is miscible with water. A contains 40.21%C, 23.45%N and 10.12%H, and each of the solution ¹H and ¹³C NMR spectra exhibits one signal. Equimolar amounts of A and RNH₂ (R = alkyl) react, eliminating dimethylamine to give B (shown below).

(i) Suggest the identity of A, and draw its structure, giving a resonance form in which all non-H atoms obey the octet rule. 

(ii) What is the origin of the miscibility of A with water?

(iii) Write a balanced equation for the formation of A from POCl₃ and Me₂NH.

Transcribed Image Text:

Me₂N RZ N N R B NMe₂