1 Electronic Supplementary Information Ionic liquids with dual pesticidal function Juliusz Pernak, a Bartosz Markiewicz, a Agnieszka Zgoła-Grześkowiak, a Łukasz Chrzanowski, a Romuald Gwiazdowski, b Katarzyna Marcinkowska, b Tadeusz Praczyk b a Institute of Chemical Technology and Engineering, Poznan University of Technology, Poznan 60-965, Poland, juliusz.pernak@put.poznan.pltel: (+)48 61 6653682 b Institute of Plant Protection, National Research Institute, Poznan 60-318, Poland Experimental section Materials:(R,S)-[1-(4-chlorophenyl)-4,4-dimethyl-3-(1H-1,2,4-triazol-1-ylmethyl)-3-penta- nol] (Tebuconazole), (±)-1-[2-(2,4-dichlorophenyl)-4-propyl-1,3-dioxolan-2-ylmethyl]-1H- 1,2,4-triazole (Propiconazole), 4-chloro-2-methylphenoxyacetic acid (MCPA), 4-chloro-2- methylphenoxypropionic acid (MCPP), 2,4-dichlorophenoxyacetic acid (2,4-D), 3,6-dichloro- 2-metoxybenzoic acid (Dicamba) were obtained in the industry as a technical sample and crystallized before use. General: 1 H NMR spectra were recorded on a Mercury Gemini 300 spectrometer operating at 400 MHz with TMS as the internal standard. 13 C NMR spectra were obtained with the same instrument at 100MHz. CHN elemental analyses were performed at the Adam Mickiewicz University, Poznan (Poland). Density was determined using an Automatic Density Meter DDM2911 with a mechanical oscillator method. The density of the samples (about 2.0 mL) was measured with respect to controlled temperature conditions via Peltier, at 25 o C. The apparatus was calibrated using deionized water as the reference substance. After each series of measurements, the densimeter was washed by two kinds of solvents and dried. Electronic Supplementary Material (ESI) for RSC Advances. This journal is © The Royal Society of Chemistry 2014