In organic chemistry, an allyl group is a substituent with the structural formula −CH2−HC=CH2. It consists of a methylene bridge (−CH2−) attached to a vinyl group (−CH=CH2). [1][2] The name is derived from the scientific name for garlic, Allium sativum.

The allylic carbon atom is the sp 3 hybridized carbon atom in the allylic group RCH 2-CH=CH 2 that is bonded with the -CH=CH 2 group. For example in propene, the highlighted carbon atom is the allylic carbon atom (CH 3 -CH=CH 2 ).

2022年2月28日 · An allylic carbon is a carbon atom bonded to a carbon atom that in turn is doubly bonded to another carbon atom. eg: see also allylic hydrogen.

2024年9月18日 · Allylic and vinylic carbons are important concepts in organic chemistry. The main difference between allylic and vinylic is their proximity to double bonds. Vinylic carbons are directly attached to a double bond, while allylic carbons are one carbon away.

The allylic carbon atoms are sp 3 hybridized carbon atoms in the allylic group, RCH 2-CH=CH 2, that is bonded with the -CH=CH 2 group. For example, in propene, the highlighted atom is the allylic carbon atom (CH 3 -CH=CH 2 ).

Allylic carbocations and radicals are important reactive intermediates. Resonance and MO Theory can be used to explain the stability of allyic carbocations.

2023年9月24日 · Knowing the origin of the terms won't help you to identify what carbon is "allyic" or "vinylic". A vinyl group is a functional group with the formula −CH=CHX2 − C H = C H X 2 and allyl group is vinyl group but an extra methylene bridge (−CHX2 − C H X 2), so it is −CHX2−HC=CHX2 − C H X 2 − H C = C H X 2.

Due to the stability of these allylic cations, they are readily formed as intermediates during chemical reactions, for example S N 1 reactions of allylic halides. The π system of a double bond can also stabilise an adjacent radical through resonance. Remember that delocalising the radical is a stabilising effect.

An allylic carbon is a carbon atom that is directly attached to a carbon-carbon double bond (C=C bond) but is not part of the double bond itself. This unique position next to a double bond gives the allylic carbon distinctive properties and reactivity patterns in organic chemistry.

Allylic Carbon can be defined as one carbon atom bonded to another carbon atom, which in turn is doubly bonded to another carbon atom. The allylic carbon provides distinct chemical properties to the allylic group.