Supporting Information Experimental evidence for ‘carbon bonding’ in the solid state from charge density analysis Sajesh P. Thomas, Mysore S. Pavan and T.N. Guru Row* Solid state and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560012, India S-1: Experimental section including data collection, structure refinement, multipole modeling and computational details F-1: ORTEP diagram of (a) Fenobam (b) Dimethylamine 4-hydroxybenzoate T-1: Crystallographic details of the experimental charge density analysis F-2: (i) (a) and (c) Variation of F obs /F cal with (sin )/ in I and II (ii) (b) and (d) Scatter plot depicting the variation of Fobs with F cal for I and II respectively. S-2: CSD Analysis T-2: Summary of CSD Analysis F-3: Histograms depicting various C A distance distribution along with corresponding scatter plots showing the C A distance vs X–C A angle. F-4: Fractal dimension plot of experimental and theoretical model (a)&(b) I (c)&(d) II F-5: Residual, deformation and Laplacian of density maps for I F-6: Deformation and Laplacian of density maps in C···Cl region F-7: Residual, deformation and Laplacian of density maps for 4-hydroxybenzoate in II F-8: Residual, deformation and Laplacian of density maps for Dimethylamine in II F-9: Deformation and Laplacian of density maps in C···O region T-3: Topological parameters of inter-molecular interactions from Experiment and Theory (italics) in I T-4: Topological parameters of inter-molecular interactions from Experiment and Theory (italics) in II T-5: Topological parameters of intramolecular bonds from Experiment and Theory (italics) in I T-6: Topological parameters of intramolecular bonds from Experiment and Theory (italics) in II F-10: Comparison of experimental and theoretical and 2 values for intramolecular bcps. F-11: Laplacian profile for the C-Cl···C and C-O···C interaction region F-12: Comparison between experiment and theory AIM charges (q) and atomic volumes in I (a) and (b); II (c) and (d) F-13: Theoretical bond paths together with bcp’s in the intermolecular regions of (a) I (b) II References Electronic Supplementary Material (ESI) for Chemical Communications This journal is © The Royal Society of Chemistry 2013