Three new heterogeneous catalysts of 3-methyl-1-sulfonic acid imidazolium transition metal chlorides [Msim][X] (where X = [FeCl4](-), [ZnCl3](-), [CuCl2](-)) were synthesized containing both Lewis and Bronsted acidic sites. These solid acids were fully characterized by various analytical tools such as FT-IR, Raman, H-1 NMR,C-13 NMR, SEM-EDX, TGA, Powder XRD, AAS, BET, UV-vis and elemental analysis. All of them were efficiently utilized as reusable catalysts (5-10 mol%) for the selective synthesis of bis(indolyl)methane derivatives in ethylacetate at room temperature within short time with excellent yields. (C) 2015 Elsevier B.V. All rights reserved.