ORG-24

Atom economy

Green metric.

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Organicatom economy

Governing equation

\\mathrm{AE}=m_{\\mathrm{prod}}/m_{\\mathrm{reag}}

where

m_p: Product (g/mol)
m_r: Reagents (g/mol)
AE: AE (—)

Lecture brief

Historical brief

Hammett (1937) and Taft linear free-energy, E-factor green metrics, Woodward–Fieser UV and Claisen equilibria are how organic chemistry became predictive. The lab is substituent, waste and tautomer. This sheet (ORG-24 — Atom economy) is the form associated with atom economy. Working symbols: $m_p$ , $m_r$ $\rightarrow$ $AE$ . Green metric.

Purpose

Purpose: compute

AE

from

m_p

m_r

in Organic chemistry via

\\mathrm{AE}=m_{\\mathrm{prod}}/m_{\\mathrm{reag}}

Green metric. Use it when a real organic chemistry question must be answered in SI before a code check.

Live realistic example

In symbols

Live case. Given

m_p = 100.000\,\mathrm{g/mol}

m_r = 150.000\,\mathrm{g/mol}

, the governing relation

\\mathrm{AE}=m_{\\mathrm{prod}}/m_{\\mathrm{reag}}

yields

AE = 0.667\,\mathrm{—}

. Green metric. Move a slider: the numbers are this situation, not a canned story.

Calculator

Inputs

Product m_p100 g/molReagents m_r150 g/mol

Outputs

AE AE0.667 —

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