Synthesis, structural analysis, and thermal decomposition studies of [(NH3)2BH2]B3H8

Huang, Zhenguo, Lingam, Hima K., Chen, Xuenian, Porter, Spencer, Du, Aijun, Woodard, Patrick M., Shore, Sheldon G., & Zhao, Ji-Cheng (2013) Synthesis, structural analysis, and thermal decomposition studies of [(NH3)2BH2]B3H8. RSC Advances, 3(20), pp. 7460-7465.

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Boron–nitrogen containing compounds with high hydrogen contents as represented by ammonia borane (NH3BH3) have recently attracted intense interest for potential hydrogen storage applications. One such compound is [(NH3)2BH2]B3H8 with a capacity of 18.2 wt% H. Two safe and efficient synthetic routes to [(NH3)2BH2]B3H8 have been developed for the first time since it was discovered 50 years ago. The new synthetic routes avoid a dangerous starting chemical, tetraborane (B4H10), and afford a high yield. Single crystal X-ray diffraction analysis reveals N–Hδ+Hδ−–B dihydrogen interactions in the [(NH3)2BH2]B3H8·18-crown-6 adduct. Extended strong dihydrogen bonds were observed in pure [(NH3)2BH2]B3H8 through crystal structure solution based upon powder X-ray analysis. Pyrolysis of [(NH3)2BH2]B3H8 leads to the formation of hydrogen gas together with appreciable amounts of volatile boranes below 160 °C.

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ID Code: 59646
Item Type: Journal Article
Refereed: Yes
DOI: 10.1039/C3RA22836C
ISSN: 2046-2069
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Deposited On: 07 May 2013 22:15
Last Modified: 13 May 2013 04:08

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