Desolvation and dehydrogenation of solvated magnesium salts of dodecahydrododecaborate: relationship between structure and thermal decomposition.

Attempts to synthesize solvent-free MgB12H12 by heating various solvated forms (H2O, NH3, and CH3OH) of the salt failed because of the competition between desolvation and dehydrogenation. This competition has been studied by thermogravimetric analysis (TGA) and temperature-programmed desorption (TPD). Products were characterized by IR, solution- and solid-state NMR spectroscopy, elemental analysis, and single-crystal or powder X-ray diffraction analysis.

New syntheses and structural characterization of NH3BH2Cl and (BH2NH2)3 and thermal decomposition behavior of NH3BH2Cl.

New convenient procedures for the preparation of ammonia monochloroborane (NH(3)BH(2)Cl) and cyclotriborazane [(BH(2)NH(2))(3)] are described. Crystal structures have been determined by single-crystal X-ray diffraction. Strong H···Cl···H bifurcated hydrogen bonding and weak N-H···H dihydrogen bonding are observed in the crystal structure of ammonia monochloroborane.

Anti and gauche conformers of an inorganic butane analogue, NH3BH2NH2BH3.

The crystal structures of an inorganic butane analogue, NH(3)BH(2)NH(2)BH(3) (DDAB), were determined using single crystal X-ray diffraction, revealing both anti and gauche conformations. The anti conformation is stabilized by intermolecular dihydrogen bonds in the crystal whereas two gauche conformations of DDAB observed in its 18-crown-6 adducts are stabilized by an intramolecular dihydrogen bond. The two gauche conformations show rotational isomerization but whether they are a pair of enantiomers is yet to be defined.

A convenient synthesis and a NMR study of the diammoniate of diborane.

DADB synthesis: The diammoniate of diborane (DADB) was synthesized in a new metathesis reaction between the diammoniate of monochloroborane and potassium borohydride in liquid ammonia. (1)H and (11)B NMR spectra of DADB are reported. The stability in THF was examined by variable-temperature (11)B NMR spectroscopy.

A simple and efficient way to synthesize unsolvated sodium octahydrotriborate.

A simple and efficient way to synthesize unsolvated sodium octahydrotriborate has been developed. This method avoids the use of dangerous starting materials and significantly simplifies the reaction setup, thus enabling convenient large-scale synthesis. The structure of the unsolvated compound has been determined through powder X-ray diffraction.

Intermolecular dihydrogen- and hydrogen-bonding interactions in diammonium closo-decahydrodecaborate sesquihydrate.

The asymmetric unit of the title salt, 2NH(4)(+).B(10)H(10)(2-).1.

Redetermination of di-μ-hydrido-hexa-hydridotetra-kis(tetra-hydro-furan)dialuminium(III)magnesium(II).

The structure of the title compound, [Mg(AlH(4))(2)(C(4)H(8)O)(4)], has been redetermined at 150 K. The Mg(II) ion is hexa-coordinated to four tetra-hydro-furan (THF) ligands, and two AlH(4) (-) anions through bridging H atoms. The Al-H distances are more precise compared to those previously determined [Nöth et al.