1) Draw an arrow pointing to EACH carbon that isnconsidered to be a “stereocenter” in thebstruxtures...
2. (18pts) (i) Draw an arrow pointing to each carbon that is considered to be a stereocenter in the structures below. (ii) Label the absolute configuration at each carbon stereocenter as either (R) or (S). (iii) Show work that justifies each label. (1pt will be deducted for each carbon that is mislabeled as a stereocenter. All other parts must be correct to receive credit for each case.) (a) OH HO OH
2. (18pts) (i) Draw an arrow pointing to each carbon that is considered to be a stereocenter in the structures below. (ii) Label the absolute configuration at each carbon stereocenter as either (R) or (S). (iii) Show work that justifies each label. (1pt will be deducted for each carbon that is mislabeled as a stereocenter. All other parts must be correct to receive credit for each case.) a) (c) (d) OH HO. OH SH
2. (18pts) (i) Draw an arrow pointing to each carbon that is considered to be a stereocenter in the structures below. (ii) Label the absolute configuration at each carbon stereocenter as either (R) or (S). (iii) Show work that justifies each label. (1pt will be deducted for each carbon that is mislabeled as a stereocenter. All other parts must be correct to receive credit for each case.) (b) (c) (d) Но НО Он SH
2. (i) (6pts) Draw an arrow pointing to each carbon that is considered to be a stereocenter in the structures below. There will be a 1pt will be deduction for each carbon that is mislabeled as a stereocenter. (ii) (12pts) Label the absolute configuration at each carbon stereocenter as either (R) or (S). (b) LL " "" " Br I
a. Braw an arrow pointing to the configurational carbon b. Put a box around the anomeric carbon. c. Put a triangle on any hemiacetal carbons. d. Circle any acetal carbons. но он Benzyl ß-D-arabinofuranoside 2. D-Galactose is the C(4) epimer of D-glucose a. Draw the Fischer projections of D-galactose and L-galactose. D-Galactose L-Galactose b. Draw a-D-galactofuranose. Be sure to clearly show the stereochemistry at each stereocenter. a-D-Galactofuranose c. Draw ß-D-galactopyranose in it's two possible chair conformations (draw one chair, then...
3. Label each stereocenter in the following molecule with an asterisk (*) and identify it as having an R or an S configuration. OH C11
4. (6pts) Label each molecule as a nucleophile or electrophile AND draw an arrow pointing to the atom on the molecule that would be the nucleophile or electrophile CI CEN HTΉ I verbo on si smith H-C-OH I-O-I H₃C – NH₂ Hool H3CH
**WRITTEN WORK** For the following molecule, label each stereocenter with an asterisk (*), and draw all possible configurational isomers. OH Br
R / S stereocenters 8. Try R 1 S stereocenter! Label each group on the stereocenter as 1, 2, 3, or 4. First look at the 4 atoms directly bonded to the stereocenter (chiral carbon). For tiebreakers, use the 3 bonds (other than bond to stereocenter) that are on each of the "tied" carbons. 4 atomsTiebreaker Rank (3 other bonds) Br Once you have rankings, Make sure #4 is pointed away, then see which direction the 1 to 2 to...
1. Draw the dash-wedge structure that corresponds to the following Newman proje OH Htci CH CH3 4 Label each stereocenter in the following molecule with an asterisk (*) and identity it as na configuration. molecule with an asterisk (*) and identify it as having an R or an S NH2 3. Draw the most stable chair conformation for the following molecule. 4. Draw 3-ethoxypentane. 5. Assign the priority of the substituents around the asymmetric carbon. Br H I BY BE