TY - JOUR T1 - Researches on the Phosphorus-Bases.--No. V. Diphosphonium - Compounds JF - Proceedings of the Royal Society of London (1854-1905) VL - 9 SP - 651 EP - 656 PY - 1857/01/01/ UR - http://dx.doi.org/10.1098/rspl.1857.0131 M3 - doi:10.1098/rspl.1857.0131 AU - Hofmann, A. ER -