S1 Electronic Supplementary Information (ESI) for the manuscript: Exploring short intramolecular interactions in alkylaromatic substrates Alberto Baggioli, Carlo A. Cavallotti, Antonino Famulari Dipartimento di Chimica, Materiali e Ingegneria Chimica “G. Natta, Politecnico di Milano, via Mancinelli 7, I-20131 Milano, Italy. Content: Figure S1. Potential energy curves relative to the torsion of the first four dihedral angles (α, β, γ, and δ) of the side chain of compound 1 S2 Table S1. {α, β, γ, δ, ε} configuration of all 15 minima of compounds 1 S3 Figure S2. Potential energy surface associated with the deformation of α and β angles in conformer 1b S4 Figure S3. Values of ρ(smin) and smin obtained from NCI analysis on distorted arrangements of conformer 1b as a function of {Δα,Δβ}. S5 Complete basis set extrapolation tests on compounds 22 and 23 Table S2 S7 Geometry optimization tests on compounds 1, 19 and 22 Tables S3 through S8 S8 Cartesian coordinates for the 15 minima discussed for compound 1 S10 Cartesian coordinates for all conformational isomers of compounds 2-23 S14 Representation of the s vs. sign(2NCI plots for selected isomers of compounds 2-23 S30 NCI analysis results obtained for selected isomers of compounds 1-23. S37 Complete citation for References 59 and 64. S43 Electronic Supplementary Material (ESI) for Physical Chemistry Chemical Physics. This journal is © the Owner Societies 2016