Polymorphs of lithium-boron imidazolates: energy landscape and hydrogen storage propertiesElectronic supplementary information (ESI) available: Coordinates of optimized structures in the form of cif-files, selected distances and angles, total energies and computational details. See DOI: 10.1039/c0dt01441a - Baburin, Igor A.; Assfour, Bassem; Seifert, Gotthard; Leoni, Stefano (Dalton Transactions: An International Journal of Inorganic Chemistry, 2011)