A new frontier for quantum chemistry: cluster integrals for realistic molecular models: SUPPORTING INFORMATION Richard J. Wheatley 1 , Andrew J. Schultz 2 , Hainam Do 3 , Navneeth Gokul 2 and David A. Kofke 2 1 School of Chemistry, University of Nottingham, University Park NG7 2RD, United Kingdom 2 Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Buffalo, NY, 14126, USA 3 Department of Chemical and Environmental Engineering, University of Nottingham Ningbo China, 199 Taikang East Road, Ningbo 315100, China S1