Need help with these Orgo Chem problems. mostly with the naming part. thank you Draw the most stable chair conforma...
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
4. Draw the most stable and most unstable Newman Projection for the following molecules using the rotation around the C3-C4 bond (use the IUPAC rules to number the chain) 5. Draw the two chair conformations for each of the following cyclohexane derivatives and then choose the conformation that is the most stable. Br BA 3 3 3 $ 2879 So ya 6. For the following compounds, identify the chiral carbons with an asterisk (*) and for those that are not...
4 4. (a) Draw the structure of the two chair forms of methylcyclohexane. Draw in all bonds (even the C-H bonds). Be sure the axial and equatorial bonds are shown correctly. On the appropriate structure, indicate the 1,3-diaxial interactions involving the methyl group. (b) Which is more stable, trans-1,3-dimethylcyclohexane or cis-1,3-dimethylcyclohexane? Why? 5. Draw the Newman projections for the anti conformation and two types of eclipsed conformations of 1,2-diiodoethane. Of the two eclipsed conformations, which is of higher energy, and...
38. Provide the correct hexagonal conformation or Ring-flipped chair conformations for the following cyclohexane (as parent chain) compounds. Then circle the more stable chair conformation. Flat Hexagon structure Chair conformation A H Chair conformation B CHS 2 Dr 2 Br 3 CH3 2 5 3 39. The following compounds have 2 stereogenic carbons, therefore 4 stereoisomeric structures (3 if there is a meso-form) These are not cyclic compounds. a) Draw the structure. b) Identify the stereogenic carbons. Assign the Cahn-Ingold-Prelog...
please draw (trans)1,3-dimethylcyclohexane in the most stable chair conformation, and assign-EXPLAIN the stereochemistry to each chiral center.. (why S or R, assign priorities)
5. Construct a model of 1,2-difluoroethane. Draw the Newman projections for the staggered and eclipsed conformations of 1,2-difluoroethane. Are these molecules isomers or conformers? If they are isomers to what specific category do they belong? 6. The structure of cyclohexane (C6H12) is based on a six membered ring of carbon atoms. Construct a model of cyclohexane. Cyclohexane can exist in two conformations; the boat or chair conformation (shown below). What are the C-C-C, C-C-H, and H-C-H bond angles at each...
1. In the structure of the antibiotic Aztreonam illustrated below, how many nitrogen atoms have a sp2 hybridization state? 2. What is the number of oxygen atoms on which the negative charge will resonate by following relevant resonance structures? (0,1,2,3,4 or 5) 3. Identify the stereochemistry of each of these double bonds marked 1 and 2 in the structure below ((E) or (Z)) 4. What is the absolute configuration of the following molecule? (R/S) 5. Determine the relationship between these...
1. Draw a chair conformation of cis-1-tert-butyl-2-ethyleyclohexane. Then, ring flip the chair to generate the other chair conformation, Circle the most stable conformation of the molecule (8 pts). 2. Designate the RIS configuration of all the stereocenters in the following molecules (8 pts): OH HO+CH3 H oH CHCI 3. Identify the relationship between the following molecules as: identical, constitutional isomers. enantiomers, or diastereomers (8 pts). enantiomers. e home enantiomers diastereomers. ó Tenantiomers. I Ć dias tereomers. MAC mome of the...
9. [03 pts. In the chair conformation of cyclohexane, how many hydrogen atoms are eclipsed? 10.105 pts.) Draw the Fischer projection of the following compound. Cl3 CH2CH3 H OM HBr OH CH3 CH₂ CH3 11. [06 pts.] Assign the chiral center(s) as R or S for each of the following molecules.
18. Provide the correct hexagonal conformation or Ring-flipped chair conformats cyclohexane (as parent chain) compounds. Then circle the more stable chair com ir conformations for the following stable chair conformation Flat Hexagon structure formation A Chair conformation B Chair conformation A Chair confort Chair conformation B ..CH3 - CH₃ 39. The following compounds have 2 stereogenic carbons, therefore 4 stereoisomeric structures (3 if there is meso-form) These are not cyclic compounds. a) Draw the structure. b) Identify the stereogenic carbons....