13. Complete with stereolabels, give the IUPAC name of compound i, below: 14. Complete with stereolabels, give the IUPAC name of compound iv. below: но. OH iv. a. Diastereomers b. Enantiomers C. Geometric isomers d. Structural isomers e. Not isomers f. Isomerism caused by asymmetric center(s) g. Isomerism caused by barrier to free rotation The questions below pertain to structures į through iv above, to the choices of relationships a through e above, and to the possible causes of relationship f and g above. For each question select each correct choice. 15. What is the relationship between structure į and structure i? 16. What is the relationship between structure i and structure ii? 17. What is the relationship between structure į and structure iv? 18. What is the relationship between structure ii and structure i? 19. What is the relationship between structure ii and structure iv? 20. What is the relationship between structure ii and structure iv?

Can someone help with this multistep sytheisis and explain why they got their answers.

See image below

Why are ducks waterproof? It’s because they produce copious amounts of oils from their uropygial glands and spread it across their feathers. In this exercise, we’ll be investigating the molecular structure of one of these preen oils to determine how it keeps ducks dry. Q.5 - Preen oil is actually a complicated mixture of many different organic compounds, such as the structure seen previously.. Ornithologists have determined that birds often use preen oil compounds for scent recognition. Below, several different chemicals isolated from preen oil are shown, along with their vapor pressures at room temperature. p-cymene has the highest vapor pressure, meaning it is the most easily evaporated compound of the three listed. Explain why p-cymene has a higher vapor pressure at room temperature compared to the other compounds. Make sure to explain what holds the p-cymene in the sample. (Image attached)