Which of the following is the least stable Newman Projection for 3-methyl hexane looking down the indicated bond (C3-C4 bond)? H H. H CH₂CH3 H H HỊCH, CHỊCH H r H CH₂CH3 H CH3 CH2CH3 -H CH₂ CH3 CH₂CH₂
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- Which Newman projection demonstrates the least stable conformation of the C3-C4 bond of 3-methylhexane? A) C2H5C2H5 H3C H B) C3H7 C3H7 H TH H 'H C) D) H. Н' H, I I C3H7 .H CH3 C3H7 C₂H5 C₂H5 H CH35 6 3 4 2 Note the root associated with each of the following number of atoms: Example Root Single # of Carbons 1 anes double enes anes Single triple bend nes anes single anes single H CH4 H X H HTC1 1C1 H H-C CCC H H H H H H H HIC CIG C-H HIC H H H H -H CIH HIC -C-C H H H double bond Alkynes H с -H Name Methane C래니 сгни Ethene H H H -C-H H H H H H—C—C C C C C-H H H H H H H2) Label the least favorable conformation and most favorable conformation of the substituted cyclohexane below. Explain your choices in 1-2 sentences or less. H3C H3C H3C F OH CH3 CH3 H3C CH3 F CH3 OH H3C CH3 H3C снаанз F CH3 CH3 -OH
- Rank the following Newman projections in order of decreasing energy, from least stable to most stable. H₂C H H A H ››› > > > x H₂C H H B H H₂C H H H C H H₂C H H D 8 M olo Ar 8. K2. Draw the Newman projection of the following compounds about the indicated bonds: F, CH3 H CH3 H OH H H CH3 Cl. НО HWhich of the species contains a r bond? co3- 03 HCN H,0 Which of the species contains a delocalized a bond? H,0 HCN O Co-
- The following are all accurate Newman projections for compound X looking down the highlighted bond, but in different conformations. Which of the shown conformations is the lowest energy conformation of X? H. H CH3 CH3 (A) C(CH3)3 H (H3C)3C- H (B) Η, Η снанз X H3C (H3C)3C H3C (C) H H H. H3C H H3C (D) C(CH3)3 HWhich Newman projection corresponds to the compound below: H3C CI OA ОВ O C OD 20 A CH3 CH3 H H F4 H3C H F5 B CH3 CH3 H CI H Me H3C CI CI C H CH3 MacBook Pro F7 H CH3 H3C H DII FB H H .H CI Nex F9Account for the fact that among the chlorinated derivatives of methane, chloro- methane has the largest dipole moment and tetrachloromethane has the smallest dipole moment. Molecular Formula Dipole Moment (debyes, D) Name CH,CI CH,CI, Chloromethane 1.87 Dichloromethane 1.60 Trichloromethane CHCI, 1.01 Tetrachloromethane CCI,
- For each example, specify whether the two structures are resonance contributors to the same resonance hybrid. H. :0-CH2 а) HO-CH2 CH2-CH2 CH2 CH2 yes no ö: :ö: b) H2C=CH-C-H H2C-CH=ċ-H c) H2C=CH-CH-CH3 H2C-CH=CH-CH3What is the most stable chair conformation of the 4-methoxy-1,2- dimethylcyclohexane structure given below? A a B b с с D d OCH: "CH3 H3C 4-methoxy-1,2-dimethylcyclohexane OCH: OCH3 H3C H3C- H3C- OCH3 H3C -OCH3 ĆH: CH3 CH3 CH3 A B DThe first resonance structure of acetamide, CH3 CONH2, is shown. H :0: ☐ || H-C-C-N-H H H Determine the correct second resonance structure of acetamide. H :0: -1 +1 H-C-C-N-H H H H :0: -1 ☐ ☐ H-C=C-N-H H H H :0: H-C-N-C-H HH ●● -1 H:0: H H-C-C=N—H H H