Title Ionic Liquid 3-Methyl-1-sulfonic Acid Imidazolium Chloride as a Novel and Highly Efficient Catalyst for the Very Rapid Synthesis of bis(Indolyl)methanes under Solvent-free Conditions Type Article Keywords Ionic Liquid; 3-Methyl-1-sulfonic acid imidazolium chloride; Biss(Indolyl)methanes; Solvent-free Abstract In this Journal, there is no need to abstract. Researchers Mohammad Ali Zolfigol (First researcher) , Ardeshir Khazaei (Second researcher) , Ahmad Reza Moosavi-Zare (Third researcher) , Abdolkarim Zare (Fourth researcher)