Alieu B.

asked • 07/08/16

Hello does anyone know the molecular formulas for these three substances (dimethylicaritin and desmethylicaritin? Also for dimethylsalidroside)?

Hello does anyone know the molecular formulas for these three substances (dimethylicaritin and desmethylicaritin? Also for dimethylsalidroside)? Maybe the first two have the same. Below are the molecular formulas of the compounds in their normal form. I don't know how to add the methyl groups. Please help, thanks.

icaritin - C21H20O6 salidroside - C14H20O7

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Harvey F. answered • 07/08/16

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Alieu B.

Harvey Fox, thank you for your information. Unfortunately I'm not a chemist. I do not know how to determine the formula. The formula you gave is for icaritin, not dimethylicaritin. I need the formulas for dimethylicaritin and dimethylsalidroside. If you know the formulas...please just state them. I do not have the background to know how to get the formulas for dimethylicaritin and dimethylsalidroside, hence my initial question. Thanks again. 
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07/08/16

Harvey F.

By using the process I gave in my answer here is how it is done. To add a methyl group (-CH3) you need a location where a single hydrogen (-H) can be removed or subtracted from the molecule. That means you subtract one H and add one C and three H in its place. This happens twice since you need dimethyl (two methyl's added) to the original molecular formula. So, you need to SUBTRACT two H and ADD two C and ADD six H to obtain the new formula for dimethylicaritin.
C21H20O6 - H2 + C2 + H6 = C23H24O6
The exact same process can be used on the salidroside - C14H20O7.
So dimethylsalidroside is C14H20O7 - H2 + C2 + H6 = C16H24O7.
I hope you understand the process I described in my original answer to you so you can do this now.
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07/08/16

Alieu B.

WOW you are the best Mr.Harvey. Thank you so very much. 
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07/09/16

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