Destroyer Baby Road Map

[allard6]

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What does "D" stand for??

Page 114... cyclopentanol + (D, H3O+) --> cyclopentene

 

[dansou5]

What does "D" stand for??

Page 114... cyclopentanol + (D, H3O+) --> cyclopentene

I dont have the book infront of me but it usually means Deuterium, which is a heavy form of hydrogen. This is used to see the arrangement of the hydrogen that is being added.

 

[LetsGo2DSchool]

In addition to tracking the arrangement, deuterium is also used for chirality purposes. Thus if they want to designate R or S chiral center but there are two H attached, they'll make the differentiation by making one of them D and thereby creating a chiral center.

Just know that D is a little heavier than H so it takes priority when figuring out the stereochemistry.