Reactio Draw

Two grids: everything that goes into the flask on the left, products on the right. Structures left of the arrow or above it go into the first grid, structures right of it into the second; without an arrow everything is a reactant. Pick each column's role (reactant, catalyst, solvent) in its header. Catalysts take equivalents in mol%. Every number carries its own unit, chosen automatically; type a unit to override it (100 µL, 0.2 mmol, 50 mM). Whatever you type into Sample Mass, Volume or Moles becomes the measured quantity and turns red and bold; the dot in the cell switches it by hand. Mark the limiting reagent and its equivalents become 1. Amounts typed for the limiting reagent set the scale of the whole reaction; amounts typed for any other reactant or catalyst update its equivalents. Mass to weigh accounts for the reagent's weight %. For reagent solutions set the molarity and the volume follows from it; for neat liquids the volume follows from density, which fills in automatically for common solvents and liquid reagents. For solvents, Molarity is the concentration of the limiting reagent in that solvent; the total over all solvents is shown below the grids and can be typed in too. Products have their own rows: expected mass and moles, measured mass, purity, product mass and moles, and yield. The sheet starts with an example: aspirin synthesis.