1. What is Atom Economy?

Definition: Atom Economy is the conversion efficiency of a chemical process in terms of all atoms involved and the desired products produced.

Purpose: It helps chemists evaluate the efficiency of chemical reactions and design more sustainable processes.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( AE \) — Atom Economy (percentage)
• \( MWP \) — Molecular Weight of Product (g/mol)
• \( MWR \) — Molecular Weight of Reactants (g/mol)

Explanation: The molecular weight of the desired product is divided by the total molecular weight of all reactants, then multiplied by 100 to get a percentage.

3. Importance of Atom Economy

Details: Higher atom economy means less waste and more efficient use of resources, which is crucial for green chemistry and sustainable processes.

4. Using the Calculator

Tips: Enter the molecular weight of your product and the sum of molecular weights of all reactants. Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is considered a good atom economy?
A: Ideally 100%, but values above 80% are generally considered good. Addition reactions typically have 100% atom economy.

Q2: How do I calculate molecular weights?
A: Sum the atomic weights of all atoms in the molecule. Use periodic table values for each element.

Q3: Does this account for yield?
A: No, atom economy is theoretical maximum efficiency. Actual efficiency would be yield × atom economy.

Q4: Should I include catalysts in reactants?
A: No, only include reactants that are incorporated into the product or become waste.

Q5: What about solvents?
A: Solvents are typically not included unless they participate in the reaction and become part of the product or waste.