(couleur) grey (Grande-Bretagne) , gray (USA) il fait gris it's a dull day, it's a grey day. faire grise mine to look morose. faire grise mine Ã  qn to give sb a cool reception.
In electrophilic aromatic substitution, the benzene ring acts as an electron donor (Lewis base or nucleophile) and reacts with an electron acceptor (Lewis acid or electrophile). The result of electrophilic aromatic substitution reactions is that an aromatic hydrogen is replaced by some other atom or functional group.
âAn alkyl group is a monovalent group. When it is linked to some other group or part of some other molecule it has a tendency to donate electrons. Thus, it is an electron donating group. In an alkyl group, for example, a methyl carbon is linked to three hydrogen atoms. Carbon is more electronegative than hydrogen.