Supporting Information for The first examples of multiply bonded dirhenium(III,II) paramagnetic complexes that contain nitrobenzoate ligands: spectroscopic, structural, cytotoxicity and computational studies† Suman Mallick, a Mrinal Kanti Ghosh, a Suman Mandal, a Vinayak Rane, b Ramakant Kadam, b Annesha Chatterjee, c Arindam Bhattacharyya c and Swarup Chattopadhyay* ,a a Department of Chemistry, University of Kalyani, Kalyani, Nadia 741235, WB, India. Tel.: +91 33 25828750; Fax: +91 33 25828282. E-mail: icskc@klyuniv.ac.in (S. Chattopadhyay) b Radiochemistry Division, RLG, Bhabha Atomic Research Centre, Mumbai 400085, India c Immunology Laboratory, Department of Zoology, University of Calcutta, 35 Ballygunge Circular Road, Kolkata – 700019, India Contents of Supporting Information Fig. S1 Solid state powder X-band EPR spectrum of 2 at 298 K Fig. S2 Solid state powder X-band EPR spectrum of 3 at 298 K Fig. S3 Solid state powder X-band EPR spectrum of 4 at 298 K Fig. S4 X-Band EPR spectrum of dichloromethane glass of 2 recorded at 126 K Fig. S5 X-Band EPR spectrum of dichloromethane glass of 3 recorded at 126 K Fig. S6 Isodensity plot of spin-up frontier molecular orbitals of 2, 3, 4 and the model Re 2 (μ- O 2 CC 6 H 4 )Cl 4 (μ-dppm) 2 complex Fig. S7 Growth inhibitory effect of the nitrobenzoic acid ligands on MCF-7 cells. Fig. S8 Growth inhibitory effect of the acetate and benzoate complexes on MCF-7 cells. Electronic Supplementary Material (ESI) for Dalton Transactions. This journal is © The Royal Society of Chemistry 2017