(4 points) 1. Look at the compounds below and answer the questions that follow. CN NH NH NH2 11 III IV a. c. Fill in the blanks with appropriate Roman numerals. These two are constitutional isomers: b. Compound(s) with C-C-N bond angle of 1200:- Compound(s) containing nitrogen with a linear geometry: d. These two are entirely different compounds with no isomeric relationship. 2. Draw two possible structures for the following orbital representation and indicate the hybridization state and the formal charge on each atom (except hydrogens). Hint: Other than hydrogen, only second row elements are present. (5 points) 3. (6 points) a. An organic compound has molecular mass 84 and an index of hydrogen deficiency of 2. It shows prominent bands in its infrared spectrum at 1710 cm- and 3000 cm! This compound has no sp hybridized atoms, and it has two sp hybridized atoms. Also, this compound has no 1 or 3 carbons. Propose a structure for this compound and show how your proposed structure matches with all of the given data. home assement b. Do you think this compound (from 3a) has a net dipole moment? Why or why not