(c) Br2 Hас Н2 (d) Hас ? CH3 CHз (e) multiple will yield a meso compound (f) none will yield a meso compound 13. Predict the major product of the reaction sequence below. CH3 он CH-ӧн (a) (b) (c) -CH3 CH3 «ӧн + enant. 1) ВНз 2) H202, NaOH CHз f be produced (d) (e) none would ? CH3 +enant. +enant, OH d. 14. How many stereoisomers of the major product would be produced in the previous ques N(c) 2 (racemic enant.) (b) 1 (archiral or stereospecific) (a) 0 (no product) () 6 (3 pairs of airs of

Chem q4 b ii

Predict the products of the following reactions with proper stereo and regiochemistry.

Which of the following set of conditions would lead to the Hofmann alkene as the major product (starting from the substrate below)? Options:   H2SO4   LDA   NaOEt, HOEt   NaOH, H2O

Draw the Lewis Structure of HNO3 Molecular Geometry? Ideal Bond Angles? Are there Polar Bonds Present (Indicate on Lewis do structure Is there an Overall Dipole? Octet rule violator and how?

Identify the MAJOR product that would be obtained at the end of the following reaction sequence. (ie. the final product not the "isolated intermediate"), Hint- write out the product of each of the three steps and be aware of the stereochemistry in step 2 and 3. NaNH, jsolated intermediate 1) Na, NH, then 2) Clz CI, H + enantiomer CI + enantiomer CI + enantiomer Ci. H + enantiomer CI

Can you show the mechenismim for both the major and minor product?

What is the product (include the stereochemistry) of the 6 pi electron electrocyclic reaction below, use the appropriate Woodward-Hoffman rule.

The hydrobrominationof 2-methyl-1-butene could theoretically lead to 2 different alkyl bromides; in practice only one product is formed. Draw the structure of both theoretical products, circle the one that is actually produced, and briefly explain whyonly one product forms.

1. Predict the major product of the following reactions. Where necessary, include correct stereochemistry/regiochemistry. Where the problem involves ortho, para directors, draw only the para isomer. HNO3 Fe 5u3 2 Ta HNU3