(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.
ASSORTED REACTIONS OF BENZENE AND METHYLBENZENE This page gives details of some reactions of benzene and methylbenzene (toluene) not covered elsewhere in this section.It deals with the combustion, hydrogenation and sulphonation of benzene and methylbenzene (toluene), and with the oxidation of side chains attached to benzene rings.Remember that benzene, methylbenzene and similar hydrocarbons based on benzene rings are collectively known as arenes.Combustion.SSORTED REACTIONS OF BENZENE AND METHYLBENZENE This page gives details of some reactions of benzene and methylbenzene (toluene) not covered elsewhere in this section.