Example:Calculate the Unsaturations for a Compound with Formula CH-N. First calculate the number of hydrogens for a saturated compound with six carbons.Add the number of nitrogens: (2xC)+2+N (2×6)+2+1=15 Now subtract from this number the actual number of hydrogens in the formula and divide by 2: 15-7 =8=4 unsaturations 2 2 Chapter 7 12 Chapter 7 12 Example: Calculate the Unsaturations for a Compound with Formula C6H7N. • First calculate the number of hydrogens for a saturated compound with six carbons. Add the number of nitrogens: (2 x C) + 2 + N (2 x 6) + 2 + 1 = 15 • Now subtract from this number the actual number of hydrogens in the formula and divide by 2: 15 – 7 = 8 = 4 unsaturations 2 2