I am not sure if this is organic chemistry or if I should have learned it back in general, so I apologize if this is in the wrong forum.
I failed organic chemisty 2 at my home institution so I am taking it at a university near me for the summer in a horrible 4 week MTWThF course beginning at 8:30 am an hour and a half from my house =(. Appropriate punishment, I suppose.
At any rate, the instructor keeps using the letter D in the chemical equations she writes on the board, and despite coming home and trying to google it and looking all through my chemistry book to find an explanation for this, I can't seem to find anything about this letter.
Searching for D organic chemistry just leads me to forums with kids complaining about the Ds they got in organic chem, so of course that does not help
If anyone coud help me out with this and then tell me what priority this mysterious "D" is in determining the priorities for functional groups, this would be VERY much appreciated.