Dihydrogen splitting by intramolecular borane‐phosphane frustrated lewis pairs: a comprehensive characterization strategy using solid state nmr and dft calculations - Knitsch, Robert; Özgün, Thomas; Chen, Guo‐Qiang; Kehr, Gerald; Erker, Gerhard; Hansen, Michael Ryan; Eckert, Hellmut (ChemPhysChem, 2019)