Consider para-azoxyanisole, which is a nematic liquid crystal in the temperature range o...

Consider para-azoxyanisole, which is a nematic liquid crystal in the temperature range of

(a) Write out the Lewis structure for this molecule, showing all lone-pair electrons as well as bonds. (b) Describe the hybrid orbitals employed by each of the two nitro-gens. What bond angles do you anticipate about the nitrogen atom that is bonded to oxygen? (c) Replacing one of the —OCH₃ groups in Para-azoxyanisole by a group causes the melting point of the substance to drop; the liquid crystal range changes to 19 °C to 76 °C. Explain why this substitution produces the observed changes in properties. (d) How would you expect the density of Para-azoxyartisole to change upon melting at 117 °C? Upon passing from the nematic to the isotropic liquid state at 137 °C? Explain.