FO 23: Identify and draw conformers. NH₂ NH2 NH2 NH2 NH2 NH2 1 NH2 NH2 4 2 3 (a) List any two structures that are related as conformers. Answer by listing exactly two numbers. (b) Draw one conformer of the new structure shown here: 1 and 3 (b) OH HO OH
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- 1E.) Which of the following two conformers is lower in energy? Both conformers are of equal enery O A Conformer A is lower in energy. B Conformer B is lower in energy. It cannot be determinedd) Molecular relationships; identify whether the compounds in each group are const. isomers, conformers, enantiomers, diastereomers, identical, meso or none of the above. ОН ОН H3C Br H3C LF H Br CH3 HO CI Br Br CI NH NHDraw a Fischer projection for each of the following molecules shown in its zigzag conformation. (a) OH (b) OH (c) OH CI HO HO HO `CN HƠ CGH5 OH OH OH OH
- Sketch the chair conformers for the following compound. Then identify which conformer is more and less stable. "CH35. (a) F H₂CH₂C (b) H ) Draw the three-dimensional structures for the following compounds. H CH3 & H3C NH₂ Br OH H CH3 BrCH, CH, CH CH, H CH H H B C CH, CH, H H CH, D a) Give the names of conformers, in the order shown. (2) b) Rank the four conformers in order of stability starting with the LEAST stable, through the MOST stable. (2) c) State the value of the dihedral angle for each conformer. (2)
- What is the relationship between these structures? H3CH2C OH CH3 HỌC HỒ CH(CH3)2 (A) conformers (C) enantiomers HO CH(CH3)2 CH2CH3 H3C OH CH3 (B) diastereomers (D) identical4. Isomers and Stereocenters ( (a) Assign each set of molecules as constitutional isomers, conformational isomers, enantiomers, diastereomers, or identical. Please write the full name for the type. Molecules Type (b) H₂Ca HgC.. CH3 OCH₂ CH3 af OCH, SP H₂C**** H₂C H₂C NGOCH, H.C_OCKS OCH₂ CH₂ H₁C HC H*** CI H H CI Br H3C CH₂ Br (d) E) (0) For each of the following molecules, write the number of stereocenters and circle the center of any stereocenters. (i) (ii) H₂C (онт (eg 5) (b) -CH3 Isegna CH3 on mots eno H₂C CH3Which of the following line drawings represents the correct stereochemistry o molecule shown in the Newman projection below? E + Н. H I CH₂CH3 LOH H CH3 OH OH || IV OH 5.... OH A) I B) II C) III D) IV K
- Acetylcholine is a neurotransmitter in the central nervous system in humans. Sighting along the C-C bond, draw Newman projection formulas for all the eclipsed and staggered conformers of acetylcholine. Which among the conformers is the least stable? The most stable? Plot a conformational analysis for these conformers.Sight along the C2-C1 bond of 2-methylpropane (isobutane).(a) Draw a Newman projection of the most stable conformation.(b) Draw a Newman projection of the least stable conformation.(c) Make a graph of energy versus angle of rotation around the C2-C1 bond.(d) Assign relative values to the maxima and minima in your graph, given that an H↔H eclipsing interaction costs 4.0 kJ/mol and an H↔CH3 eclipsing interaction costs 6.0 kJ/mol.Two VSEPR diagrams for Molecule 2 are given below. They are conformational isomers or molecules that place atoms differently in space because of the rotation of a single bond. Conformer 3 H H H H H H C4 Conformer 4 H 3. (b) Can you "see" either of the two conformational isomers (Conformer 3 or Conformer 4) in the line drawing that you drew for Molecule 2? Explain your answer.