PH 0010 Lecture Notes - Aryne, Chemical Formula, Carbon-13 Nuclear Magnetic Resonance
Document Summary
Scopy problem: calculate the number of double bonds in the molecular formula by the following equation ((number of carbons*2+2) + (number of nitrogen)) ((number of hydrogen atoms+ number of halogen atoms)) / 2. If number of double bonds equals 4, there is a benzyne ring: look at ir chart, if there is a peak near 1700, there is a carbonyl group. If there is a peak near 3300, there is a hydroxyl or amine group: look at c13 nmr, if dept, upward charts represent ch3 and or ch, downward charts represent ch2. Both c13 nmr and h1nmr show only types of carbons and protons. There is an appearance agreement between at c13 nmr and h1nmr.
