SUPPLEMENTARY INFORMATION FOR Synthetic, mechanistic and kinetic studies on the organo-nano catalyzed synthesis of oxygen and nitrogen containing Spiro compounds under ultrasonic condition Nongthombam Geetmani Singh, a Makroni Lily, b Soungaijam Premila Devi, b Noimur Rahman, a Aziz Ahmed, c Asit Kumar Chandra, b and Rishanlang Nongkhlaw a * a Organic synthesis Lab, Centre for Advanced Studies in Chemistry, North Eastern Hill University, Shillong, Meghalaya-793022, India b Computational Lab, Centre for Advanced Studies in Chemistry, North Eastern Hill University, Shillong-793022, India. c Indian Institute of Technology, Patna 800013, India  E-mail: rlnongkhlaw@nehu.ac.in; Tel.: +91-364-2722628; fax: +91-364-2550076; Table of content Page No. 1. Experimental Section 1-2 2. Table S.I. 1. X-ray crystallography data for compound 5a 3 3. Table S.I. 2. X-ray crystallography data for compound 9a 4 4. Analytical data of the compound 4a-e, 5a-e, 6a-e, 7a-e, 8a-e, 9a-b, 10a-b, 11a-b, 12a-c and 13a-b. 5-12 5. 1 H & 13 C NMR Spectra of compounds 4a-e, 5a-e, 6a-e, 7a-e, 8a-e, 9a-b, 10a-b, 11a-b, 12a-c and 13a-b. 13-82 Electronic Supplementary Material (ESI) for Green Chemistry. This journal is © The Royal Society of Chemistry 2016