1 SUPPLEMENTARY INFORMATION FOR A Nano-organo catalyzed route towards the efficient synthesis of benzo[b]pyran derivatives under Ultrasonic irradiation. Ridaphun Nongrum a,b , Geetmani Singh Nongthombam b , Mattilang Kharkongor c , Jims World Star Rani b , Noimur Rahman b , Chingrishon Kathing b , Bekington Myrboh b and Rishanlang Nongkhlaw b* a Department of Chemistry, Sankardev College, Bishnupur, Shillong, Meghalaya-793004, India. b Centre for Advanced Studies in Chemistry, North-Eastern Hill University, Shillong, Meghalaya- 793022, India. c Department of Zoology, Sankardev College, Bishnupur, Shillong, Meghalaya-793004, India. *E-mail: rlnongkhlaw@nehu.ac.in; Tel.: +91-364-2722628; fax: +91-364-2550076; Table of Content Page No 1. General procedure for the preparation of the catalyst 2 2. Table I.1. X Ray Crystallography Data for compound 7b 3 3. Table I.2 X Ray Crystallography Data for compound 10a 4 4. Table I.3 X Ray Crystallography Data for compound 11d 5 5. Analytical Data of the synthesized compounds 6 6. 1 H and 13 C NMR Spectra of the compounds 13 7. DFT Supporting information (Standard orientation of the optimized structures) 63 Electronic Supplementary Material (ESI) for RSC Advances. This journal is © The Royal Society of Chemistry 2016