CH3 H. CH3 CH3 CH3 CH3 H Br Br H. Br H H. H. H3C CH3 ČH3 Br 2-bromobutane a b The wedge-dash representation of 2-bromobutane is shown. What is the orientation of the chiral center(s)? Write the orientation as in the following examples, (2S) or (2R,3S), not 2s or 2R,3S. Be sure to include the parentheses and the number, and comma as necessary. Which of the Newman structures is equivalent to the wedge-dash structure? Note that the equivalent Newman structure will not necessarily have the same conformation as the wedge-dash structure.

The general formula for alkanes is CnH2n+2. What is the value of n in 3,7-dimethyldecane? How many chiral centres does this molecule have? Select one: a. n = 10; there is one chiral centre b. n = 12; there is one chiral centre c. n = 10; there are two chiral centres d. n = 12; there are three chiral centres e. n = 12; there are two chiral centres

Which is the correct assignment of chirality at C2 and C4 of the following molecule?

i) How many lone pairs of electrons are present? ii) What is the configuration of the chiral centre? iii) What is the hybridization of the nitrogen atom in the nitrile moiety? iv) How many pi bonds are there?

Circle and name (R or S) the chiral centers

Specify the configurations (R or S) of chiral centers a and b in the chem3D structure below. F CI CI H3C° CI ball & stick + labels Carbon a: Carbon b:

What is the configuration of the carbon atom indicated by the dot? (a) R (b) S (c) Not a chiral center 17. HQ (a) R (b) S (c) Not a chiral center HI ***** What is the configuration of the carbon atom indicated by the dot? HQ OH HT $261 OH

4. For each pair of molecules, assign the configuration at each chiral center as R or S. Give the relationship between the pair of molecules as no relation, constitutional isomers, same molecule but not meso, same molecule and meso, enantiomers, or diastereomers. There should only be one possible answer. a. OH OH b. Br Br с. NH2 NH2 NH2 NH2 d. HO НО

What are the Chiral centers' absolute configurations (R or S) for the following molecule. Hint (Number 2 is next to CO2H) A. 2S, 3R B. 2R, 3R C. 2S, 3S D.2R, 3S O A OB O C E. One of carbons is not chiral OD HO₂C H OE F H H3C CH₂CH3 B Il Proctorio is sharing your screen. ho Stop sharing Hide