Can anyone tell me why the yield would be lower for a green synthesis compared t

Question

Can anyone tell me why the yield would be lower for a green synthesis compared to a more hazardous synthesis for A Multistep Synthesis Incorporating a Green Bromination of an Aromatic Ring? I couldn't find the answer.

erform this experiment in In the fume hood, dissolve 1 mL of aniline in 2 mL acetic anhydride in an appropriate vessel (choose glassware that will minimize vapors!) Cool the solution in an ice bath to at least 5°C. Let the reaction occur over 5 minutes, with occasional stirring. Stop the reaction by adding 30 mL of a 0.5 M NaOH (prepared from solid NaOH and water) to the organic solution. Warm the mixture to dissolve the solids (adding more water as necessary). Allow the solution to slowly cool to encourage crystallization and then isolate as many crystals as possible. Record the product's mass when sufficiently dry. Store the acetanilide in an appropriately labeled sample vial until Day 2 Standardization of Sodium Hvpochlorite in Bleach (60 minutes) Form a group of four for this section As a group of four, standardize the bleach by first preparing the titrant standard (sodium thiosulfate) and the acidic iodide solution using the methods outlined below Record the quantities of all materials used: Prepare a 0.1 M (your solution concentration must have three significant figures) sodium thiosulfate pentahydrate (Na,SO3+5H2O) solution using a 100 mL volumetric flask (record the amounts used!)· This solution will be the standard titrant and therefore should be in the burette. Clean the buretle first with a litle bit of the titrant before committing the rest of the solution to the burelle Prepare an acidic iodide solution by mixing 8 mmole Nal and 4 mL acetic acid in a 100 mL volumetric flask and then diluting to the mark with water. For each titration trial, mix in an Erlenmeyer flask the acidic iodide solution (25 mL) and bleach (pipette 1.00 mL) This solution will immediately turn brown from iodine formation. Titrate into the flask. The iodine solution's

Explanation / Answer

There is concept called atom economy in green synthesis which can be defined as the
mass of the atoms in the reactant converted to desired product, however this not take
yield into account. More the atom economy %, more useful greener synthesis the reaction
would be. However in green synthesis the reaction time is more and sometimes the reactions
may not reach completion when compared to normal process where reaction takes place
at faster rates. Hence the yields are low for green synthesis when compared to normal ones.

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