Complex sentence: The process of forming diazonium compounds is called "," diazoniation ", or" the reaction was first reported by Peter Griess in 1858, who subsequently discovered several reactions of this new class of compounds.
Split into simpler sentences: The process of forming diazonium compounds is called "diazotation", "diazoniation", or "diazotization". The reaction was first reported by Peter Griess in 1858, who subsequently discovered several reactions of this new class of compounds.