Classify each hydrogen atom in the following compounds as primary (1°), secondary (2°), or tertiary (3°).(a) butane (b) isobutane (c) 2-methylbutane(d) cyclohexane (e) norbornane (bicyclo[2.2.1]heptane)

QB=0&inProgress=0 Which of the following is the correct structure for (S)-1,1,3-trimethylcyclohexane

HO₂ H COOH COOH V POH HOT COOH cooff VI Ho HO COOH COOH VI H H COOH COOH VIIL OH OH Question: In the structures / examples abovke Identify V, VI, VII and VIII as Identical enantiomers, ciastereomes, stereo/cumers and/or structural isomers (there are 6 pairs 7 Comp eand to discover te I&T I TEN TEM TIMIN).

Give the systematic name for each of the following; (b) (a) (d) CH3 I CH3-C-CH2-CH3 I CH3 CH3 CH3-CH2-CH-CH=CH2 CH3 I CH3-CH₂-CH-CH-CH3 I CH₂ I CH3 (e) (c) CH3 I CH3-CH₂-CH=C-CH-CH3 I CH3 -CH3 CH₂CH3

(a) What is the IUPAC name for the following molecule (including absolute configurations if required)? (b) Draw the Newman projections looking down the C3-C4 bond that represent all the three staggered conformations for the molecule shown above. (c) Given that the strain energies below, calculate the strain energies for each conformer and identify which is the most stable. Gauche interaction Strain Energy HOCH3 0.0 kJ mol- HOCH;CH; |0.4 kJ mol- 3.8 kJ mol- | 4.3 kJ mol- CH;CH3 CH;CH2CH3 |CH2CH; CH2CH; 4.6 kJ mol- Newman Projection of Conformer 1 Strain Energy of Conformer 1 Newman Projection of Conformer 2 Strain Energy of Conformer 2 Newman Projection of Conformer 3 Strain Energy of Conformer 3