Ammonia Borane and Related Compounds as Hydrogen Source Materials

Ammonia Borane and Related Compounds as Hydrogen Source Materials 

Florian Mertens, Cert Wolf, and Felix Baitalow 

Mainly driven by the efforts of the automotive industry, a strong push towards new concepts to store hydrogen has occurred over recent years. Generally, in this framework, high hydrogen content materials have been of great interest for chemical storage concepts. 

A particularly important feature of AB materials is the existence of the so-called dihydrogen bond. Guided by the unusually short distance of 2.02 A compared to the sum of the van der Waal s radii of 2.4 A between the nearest hydridic and protic hydrogen atoms located at the boron and nitrogen atom of different AB molecules, an unknown type of bond, the dihydrogen bond, was postulated [19, 32]. Its detailed 

AB is soluble in water and in many organic solvents. It possesses high solubility, that is, 5 wt%, in H2O, EtOH, THE, Diglyme, Triglyme significant solubility, that is, 0.5-1 wt%, in Et20, and dioxane, low solubility, that is, 0.1 wt%, in toluene and 

---

S Ammonia Borane and Related Compounds as Hydrogen Source Materials Table 8.5 Hydrogen release from substituted AB materials. 

---