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- For the compounds given (A, B, C) 1. determine their relationship ( enantimers, idential/same compind, diatermeros, constitutional isomers) and give a short explanation whyHow can the two isomers having molecular formula C2H6O be distinguishedby IR spectroscopy?Assign the stereochemical configuration (R or S) for each molecule. For this question, the priorities have already been assigned.
- Does C-H absorb more infrared radiaiton than C triple bond C?For the molecule below, a) Draw out every possible stereosimer. b) Indicate any enantiomer pairs c) Then, indicate any meso-stereoisomers, and proceed to clearly indicate the internal mirror plane.3 Select the correct representations (using Newman projections) for the staggered rotational isomers ("rotamers") about C2-C3 in 2-methylbutane. H H3C H3C H H3C I I- H H H CH3 H CH3 CH3
- Answer the following questions for the MOs of 1,3-butadiene: a. Which are p bonding MOs, and which are p* antibonding MOs? b. Which MOs are symmetric, and which are antisymmetric? c. Which MO is the HOMO and which is the LUMO in the ground state? d. Which MO is the HOMO and which is the LUMO in the excited state? e. What is the relationship between the HOMO and the LUMO and symmetric and antisymmetric orbitals?Assign an R or S configuration to each stereocenter. (For #2, refer to C atom labelled with *)a. For the following compounds, which pairs of hydrogens (Ha and Hb) are enantiotopic hydrogens?b. Which pairs are diastereotopic hydrogens?