Benzimidazolines Convert Sulfur Dioxide to Bisulfate at Room Temperature and Atmospheric Pressure Utilizing Aerial Oxygen Sonam Mehrotra Sakthi Raje Anant Kumar Jain Raja Angamuthu 10.1021/acssuschemeng.7b01495.s003 https://acs.figshare.com/articles/dataset/Benzimidazolines_Convert_Sulfur_Dioxide_to_Bisulfate_at_Room_Temperature_and_Atmospheric_Pressure_Utilizing_Aerial_Oxygen/5100889 By employing a simple strategy of reacting SO<sub>2</sub> gas with easily attainable hydride donors such as 2-substituted-1,3-dimethyl-2,3-dihydro-1<i>H</i>-benzo­[<i>d</i>]­imidazole, benzimidazoline and SO<sub>2</sub> were converted into benzimidazolium bisulfate at room temperature and atmospheric pressure. Bisulfate originated from SO<sub>2</sub> and hydride from benzimidazoline and aerial oxygen. Metastable dimers of bisulfate anions were observed in the solid state and in solution where the anions are not stabilized by encapsulation in cages but through hydrogen bonding from benzimidazolium cations. All three benzimidazolines and resulted benzimidazolium bisulfates have been characterized using <sup>1</sup>H and <sup>13</sup>C NMR spectroscopy, high-resolution electrospray ionization mass spectrometry, and single crystal X-ray diffraction techniques. 2017-06-02 00:00:00 benzimidazoline hydride donors benzimidazolium bisulfates benzimidazolium cations Metastable dimers Benzimidazolines Convert Sulfur Dioxide 2 gas Atmospheric Pressure Utilizing Aerial Oxygen room temperature 1 H bisulfate anions benzimidazolium bisulfate crystal X-ray diffraction techniques Room Temperature 13 C NMR spectroscopy Bisulfate electrospray ionization mass spectrometry