I am preparing a lab experiment to find the beta-glucan content of mushroom extracts via colourmetric method. I have limited organic chemistry experience, but have a biology background and would love to understand the science behind what I am doing. I would like to create a the structural formula for the reactions that will take place in my experiment. I am curious to understand the molecular geometry - how the electrons are moving and breaking up bonds. I want to draw it all out and post it in my lab - but I really have no idea where to start and how to determine the molecular structures I am working it - I think if I saw them I might have an idea of where the electrons are moving and why they are reacting in certain ways. I have pasted a link below, and the general principal of the method from the megazyme website. Are there resources a novice chemical can tap into to help with this sort of thing? I'm probably being naive, but something like a database of structures that I can search through? If I have an idea of the structures I am working with, I can do some work by myself and then ask questions here one step at a time to see if I have the reactions right.
(1) β-Glucan + H2O → β-gluco-oligosaccharides
(2) β-Gluco-oligosaccharides + H2O → D-glucose
(3) D-Glucose + H2O + O2 → D-gluconate + H2O2
(4) 2H2O2 + p-hydroxybenzoic acid + 4-aminoantipyrine → quinoneimine + 4H2O