Premium
Structure and Properties of NaBH 4 ·2H 2 O and NaBH 4
Author(s) -
Filinchuk Yaroslav,
Hagemann Hans
Publication year - 2008
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200800053
Subject(s) - chemistry , hydrogen bond , crystallography , crystal structure , ion , hydrate , tetrahedron , hydrogen storage , hydrogen , infrared spectroscopy , hydrazine (antidepressant) , inorganic chemistry , molecule , organic chemistry , chromatography
NaBH 4 · 2H 2 O and NaBH 4 were studied by single‐crystal X‐ray diffraction and vibrational spectroscopy. In NaBH 4 · 2H 2 O, the BH 4 – anion has a nearly ideal tetrahedral geometry and is bridged with two Na + ions through the tetrahedral edges. The structure does not contain classical hydrogen bonds, but reveals strong dihydrogen bonds of 1.77–1.95 Å. Crystal structures and vibrational spectra of NaBr · 2H 2 O and NaBH 4 · 2H 2 O reveal many similarities. The unit cell volume of NaBH 4 · 2H 2 O increases linearly with temperature between 200 and 313 K. At 313–315 K, the hydrate decomposes into NaBH 4 and H 2 O, which react to release hydrogen.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)