What are some other examples of electron donating and electron withdrawing groups?

An electron withdrawing group (EWG) is a group that reduces electron density in a molecule through the carbon atom it is bonded to….Examples are:

• Nitro groups (-NO2)
• Cyano groups (-CN)
• Carbonyl groups such as aldehydes (-CHO) and ketones (-COR)
• Esters (-COOR)

Is CO2Me electron-withdrawing?

The dienophile contains two unsaturated electron-withdrawing substituents: CO2Me and NO2. We normally expect NO2 to be a more powerful electron acceptor, and this squares with most of the reaction data.

What are electron withdrawing groups called?

An electron withdrawing group (EWG) draws electrons away from a reaction center. When this center is an electron rich carbanion or an alkoxide anion, the presence of the electron-withdrawing substituent has a stabilizing effect. Examples of electron withdrawing groups are. halogens (F, Cl);

How can you tell between withdrawing and donating electrons?

Electrons (lone pairs) and resonance structures. Draw each group out, you will notice that all the donating group have an electron lone pair on the atom connected to the ring (or whatever). The withdrawing groups will typically have a positive charge on the atom connected to the ring or structure.

Which is an example of an electron withdrawing group?

Examples of electron withdrawing groups: Functional groups that donate electron density are called electron donating groups (EDG). Examples of electron donating groups: -O- , -NR 2, -NH 2 –OH, -OR, -NHCOR, -R are electron donating groups. What are the functional groups that give tollen’s test and fehling’s test respectively ?

How are electron donating groups different from activating groups?

Electron donating groups are typically divided into three levels of activating ability (The “extreme” category can be seen as “strong”.) Electron withdrawing groups are assigned to similar groupings. Activating substituents favour electrophilic substitution about the ortho and para positions.

Can a amide be an electron donating or withdrawing electron?

Amides can be either electron donating or electron withdrawing. It depends on how the amide is attached to benzene/aromatic group.