“…The most important are: hydrazine borane (HB), (Hugle et al, 2009) guanidinium borohydride (GBH), (Groshens & Hollins, 2009) ethylenediamine bisborane (EDB), (Neiner et al, 2011) methylguanidinium borohydride (Me-GBH) (Doroodian et al, 2010) and different alkyl amine boranes ( Figure 3). (Bowden et al, 2008;Mal et al, 2011) On the frontier between molecular and metal hydride storage materials are the metal amido borane compounds, which are not in the scope of this chapter.…”