The number of different HNMR signals represent the number of different hydrogens. Here are the steps you need to do to correctly identify them. 1. Label all of the hydrogens in a molecule so you don't accidentally miss one, and don'd put a signal where the hydrogen in missing. In order to label the hydrogens, we need to remember that a carbon wants to have 4 bonds. Depending on how many bonds the carbon has, is how many hydrogens we give it. For example, if it has only one bo

Which of the following substrates would react most efficiently in a substitution reaction with sodium cyanide (NaCN)? (A) 1-iodohexane (B) 1-fluorohexane (C) (R)-2-bromohexane (D) chlorocyclohexane (E) 1-bromo-1-methylcyclohexane Answer: (A) 1-iodohexaneA Solution: We first must figure out which reaction does the question ask about. The question mentions substitution reaction, thus either SN1 or SN2. We are also given NaCN as the nucleophile. We need to remember that SN1

Draw the structural formula for at least one bromoalkene with the molecular formula C5H9Br that shows: (a) Neither E,Z isomerism nor chirality. (b) E,Z isomerism but not chirality. (c) Chirality but not E,Z isomerism. (d) Both chirality and E,Z isomerism. In order to do this questions we must know two things. A molecule that does not have a chiral center will not be chiral. A chiral center is a carbon that is attached to four different groups. Therefore, if we need to draw a

Which compounds contain chiral centers? (a) 2-Chloropentane (b) 3-Chloropentane (c) 3-Chloro-1-pentene (d) 1,2-Dichloropropane A chiral center is a carbon that is attached to 4 different groups. We should start by drawing out molecules, and adding the necessary number of hydrogens to each carbon. Remember a carbon wants to always have 4 bonds. Therefore, if we see a carbon with 2 bonds, we attach 2 more hydrogens and so forth. We can always eliminate carbons that have 2 or 3

Organic chemistry is notorious for being one of the hardest subjects in college. Don't panic though. Here is a list of how to best study and ace your organic chemistry class. 1. Read the chapter, paying most attention to the in chapter problems. Some students even skip reading the chapter since problems practicing is most important for organic chemistry. You can try to do the in-chapter problems on your own and then check with the answers to make sure you did it correctly. 2.