Allylic Vs Vinylic Hydrogen

Allyl groups have three carbon atoms and five hydrogen atoms.

Allylic vs vinylic hydrogen. The name is derived from the latin word for garlic allium sativum in 1844 theodor wertheim isolated an allyl derivative from garlic oil and named it schwefelallyl. The key difference between allylic and vinylic carbon is that allylic carbon is the carbon. An allyl group is a substituent with the structural formula h 2 c ch ch 2 r where r is the rest of the molecule. The key difference between these two structural components is the number of carbon and hydrogen atoms.

Allyl indicates a functional group with structural formula h 2 c ch ch 2 r where r is the rest of the molecule it consists of methylene bridge ch 2 in between the vinyl group ch ch 2 and the rest of the molecule therefore allyl group contains sp 2 hybridized vinyl carbon atoms and sp 3 hybridized allyl carbon atom. Allyl group holds three carbon atoms and five hydrogen atoms on the other hand vinyl group has two carbon atoms and three hydrogen atoms. We also acknowledge previous national science foundation support under grant numbers 1246120 1525057 and 1413739. The vinylic hydrogens are shown in red.

None of the other hydrogens are vinylic. Key difference allylic vs vinylic carbons functional groups are very important in understanding the different physical and chemical properties of organic molecules the terms allylic and vinyl carbons indicate whether the carbon atom is bonded directly or indirectly to a double bond in a molecule. The allylic position is also like a vinylic position. The allylic carbon atom is more reactive than normal.

An allylic hydrogen is a hydrogen atom that is bonded to an allylic carbon in an organic molecule. Identify the number of allylic and vinylic hydrogens in the pictured molecules. A hydrogen atom bonded to an sp 2 carbon of an alkene. It consists of a methylene bridge ch 2 attached to a vinyl group ch ch 2.

The general formula for allyl is r ch 2 ch ch 2 in which the asterisk carbon atom is an allylic carbon atom. Benzylic position allylic position propargylic position aryl aryl hydrogen. The libretexts libraries are powered by mindtouch and are supported by the department of education open textbook pilot project the uc davis office of the provost the uc davis library the california state university affordable learning solutions program and merlot. The allylic carbon is bonded to a carbon atom which is doubly bonded to another carbon atom.