2. Determine the absolute configuration for all stereocenters in the following molecules. CI CH3 a. OH OH b. OH C. d. نه CI COOH HO -H H -CH3 CH3 CI CI
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- 3. Indicate the multiplicity for all nonequivalent H's in the following molecules. ICH,CH,CHB12 H3C CH3 CI CH3 .CH3 H ČH3Q45: How many stereocentres are present in the molecule? Bri... H CI -CBr HWhen energy is absorbed bya molecule, which of the following CAN NOT happen next? O Transition to a lower vibrational state. O Transition to another electronic state with the same spin (So to S1). Transition to a higher vibrational state. O Transition to another electronic state with a different spin (So to T1).
- SN2 displacement of a chiral molecule occurs with inversion of configuration. True FalseSelect a single sp3–sp3 or sp3–sp2 bond from a linear portion of the molecule, identify it, and draw a Newman projection for it. Then draw a Newman projection for a 60 degree rotational isomer. List each rotational isomer as lower or higher energy. If your molecule is cyclic and has no linear portions, then draw the expected conformation of the cyclic portion of the molecule.the stereo center in this molecule is ___. a. R b. S
- 2. Designate the R/S configuration of all the stereocenters in the following molecules COOH HO-HSN? displacement of a chiral molecule occurs with inversion of configuration. A True B) FalseA chair structure of a trisubstituted cyclohexane is shown below. Determine which of the following 2D representations matches the chair structure. CH3 CH3 H3C- CH3 A) I II CH3 CH3 CH3 B) I| CH C) II CH3 IV CH, CH3 CH3 D) IV