eq.

16:45 Dec 23, 2016 

As Karen Tkaczyk has said, eq stands for 'molar equivalent'. This is very clear in the 2nd example where the quantity of hydroxylamine hydrochloride (3.10 mmol) is exactly four times the quantity of 293-5 (775.37 µmol), i.e. for each molecule of 293-5 (whatever that is) there are four molecules of hydroxylamine hydrochloride, hence 4.00 eq. The situation is a bit more complicated in the first example. For each molecule of N-(tert-Butoxycarbonyl)-L-valine in the mixture, there is exactly one molecule of carbonyldiimidazole because the total quantity of each compound is 37.1 mmol. So why 1.5 eq and not 1.0 eq? My guess is that the quantity of reactants is being compared with the quatiry of the reaction product, i.e. the reaction produces 37.1/1.5=24.73 mmol of the reaction product.

09:20 Dec 23, 2016 

Actually, this is my first guess, but I am not sure.

09:15 Dec 23, 2016