Draw a structural formula for the major product of the reaction shown. CH₂CH3 Br₂ H₂O • Show product stereochemistry IF the reactant alkene has both carbons of the double bond within a ring. • Do not show stereochemistry in other cases. • If the reaction produces a racemic mixture, just draw one stereoisomer.

Please answer both, thank you so much!

Draw a structural formula for the substitution product of the reaction shown below. ● H3C HH Br + O • Use the wedge/hash bond tools to indicate stereochemistry where it exists. • If more than one stereoisomer of product is formed, draw both. Separate multiple products using the + sign from the drop-down menu. • Products that are initially formed as ions should be drawn in their neutral forms. ▼ In [F OCH 3 -85 ? Na CN CH3CH₂OH ChemDoodleⓇ >

1. Identify whether the following alkenes have E or Z stereochemistry (where there are multiple alkenes, determine the stereochemistry of the one indicated by an arrow). HO Br OH & e) OH Br

Chemistry

Draw a structural formula for the major product of the reaction shown. Cl₂ H₂O Show product stereochemistry IF the reactant alkene has both carbons of the double bond within a ring. • Do not show stereochemistry in other cases. If the reaction produces a racemic mixture, just draw one stereoisomer. 8 Sn [F ChemDoodleⓇ

A novel heterocyclic compound, M, contains nitrogen and sulfur atoms and exhibits interesting photochemical properties. When exposed to ultraviolet (UV) light at a specific wavelength, M undergoes a photoreaction resulting in two products: N and O. Product N is formed through a [2+2] cycloaddition involving the nitrogen atom in M, while product O results from a homolytic cleavage of a sulfur-sulfur bond in M. Given these reaction pathways, what is the most probable structure of M, and what are the likely structures of N and O? A. M is a thiazole derivative; N is a dimerized product through the nitrogen atoms, and O is a compound with two sulfur-centered radicals. B. M is a diazine derivative; N is a tetra-atomic cyclic compound, and O is a compound with two separate thiol groups. C. M is a thiadiazole derivative; N is a four-membered ring involving the nitrogen atom, and O results in two sulfur-centered radicals. D. M is a dithiolane derivative; N is a dimer involving the nitrogen…

When carbonyl compounds are reduced with a reagent such as LiAlH4 or NaBH4 and a new stereogenic center is formed, what will the composition of the product mixture be?                       Forms more of one enantiomer than another because of steric reasons around the carbonyl Forms more of one enantiomer than another depending on the temperature of the reaction Forms different products depending on the solvent used Forms a racemic mixture of the two possible enantiomers

The southern pine beetle utilizes a multi-component aggregation pheromone (one component shown below) to start mass colonization of healthy trees. The biosynthetic pathway involves the cyclization of this acetal from the straight chain structure. Draw the straight chain structure that could be used to form this acetal. Use wedges and dashes to correctly depict the stereochemistry. H3C O- 2 3 OH O Proble Atoms, Bo and Ring HS 5 466 HO S

A. Circle all the alpha carbons in the following compounds that are sp' and square any that are spʻ. B. For all compounds with an sp' alpha carbon, identify each as either 1°, 2° or 3°.