1. A Review of General Chemistry

What is the molecular formula for each of the following?

a. a 4-carbon hydrocarbon with two $\pi$ bonds and no rings

What is the molecular formula for each of the following?

b. a 10-carbon hydrocarbon with one $\pi$ bond and 2 rings

What is the molecular formula for a 5-carbon hydrocarbon with one $\pi$ bond and one ring?

If a hydrocarbon has nine carbon atoms, three double bonds, and one ring, how many hydrogen atoms must it have?

Hint: If you prefer to use a formula, elements of unsaturation = 1/2(2C + 2 - H)

C = number of carbons

H = number of hydrogens

Cholesterol, C₂₇H₄₆O, has only one pi bond. With no additional information, what else can you say about its structure?

Calculate the number of elements of unsaturation implied by the molecular ­formula C₆H₁₂.

Hint: If you prefer to use a formula, elements of unsaturation = 1/2(2C + 2 - H)

C = number of carbons

H = number of hydrogens

Calculate the index of hydrogen deficiency for the following molecular formulas and structures.

(c)

Calculate the index of hydrogen deficiency for the following molecular formulas and structures.

(b)

What is the index of hydrogen deficiency for each of the following molecular formulas?

(d) C₉H₁₂N₂O₂

Given the structure, calculate the index of hydrogen deficiency (degrees of unsaturation) of the following molecules.

(a)

What is the index of hydrogen deficiency for each of the following molecular formulas?

(a) C₆H₁₂O₆

What is the index of hydrogen deficiency for each of the following molecular formulas?

(c) C₈H₁₄Cl₂

Calculate the index of hydrogen deficiency for the following molecular formulas and structures.

(a)

Count the elements of unsaturation in parsalmide, ethynyl estradiol, and dynemicin A.

Given the molecular formula, calculate the index of hydrogen deficiency.

(b) C₄H₉ON