acyl species

Acyl intermediates include acyl anions, acyl radicals and acyl cations (synonym acylium ions) which are formally derived from oxoacidsR_kE(=O)_l(OH)_m (l ≠ 0) by removal of a hydroxyl cationHO⁺ , a hydroxyl radical HO^. or a hydroxyl anionHO⁻ , respectively, and replacement analogues of such intermediates. Acyl anions, radicals and cations can formally be represented by canonical forms having a negative charge, an unpaired electron or a positive charge on the acid-generating element of the oxoacid. Acyl anions. E.g. Acyl radicals. E.g. Acyl cations. E.g.