Vibrational spectroscopic study of cationic Beryllium, Magnesium, Aluminum, Scandium, and Yttrium ammines in crystals

Reactions of Beryllium Halides in Liquid Ammonia: The Tetraammineberyllium Cation [Be(NH3)4]2+, its Hydrolysis Products, and the Action of Be2+ as a Fluoride‐Ion Acceptor

“…These cell parameters are neither those of compound 1 nor of pure BeCl 2 . Grigor'ev et al es- 4 ]Cl 2 to be isotypic with K 2 BeCl 4 , [48] whereas our powder patterns do not show this relationship. We were able to solve the structure and perform a Rietveld refinement, which gave satisfactory R values and a reasonable structural model with four nitrogen atoms in a tetrahedral arrangement and two chloride ions.…”

“…[46] Bergstrom treated beryllium with NH 4 Cl in liquid ammonia and also obtained two products with the compositions BeCl 2 ·2NH 3 and BeCl 2 ·4NH 3 . [47] That BeCl 2 ·4NH 3 contains the tetraammineberyllium cation was suggested by IR spectroscopy data, [48,49] but this interpretation was heavily doubted. [50] A 9 Be NMR spectrum of BeCl 2 dissolved in liquid ammonia has only been recorded once and the observed singlet was assigned to the [BeA C H T U N G T R E N N U N G (NH 3 ) 4 ] 2 + cation, [49] but the conditions of the experiment remained unclear and no standard was used.…”

[Be(ND3)4]Cl2: Synthesis, Characterisation and Space‐Group Determination Guided by Solid‐State Quantum Chemical Calculations

“…They prepared the compounds BeCl 2 ·2NH 3 and BeCl 2 ·4NH 3 , and confirmed their compositions by chemical analysis. [2] Later, Bergstrom treated Be with NH 4 Cl in liquid ammonia and also obtained two products of the composition BeCl 2 ·2NH 3 and BeCl 2 ·4NH 3 . [3] That the compound BeCl 2 ·4NH 3 contains the tetraammineberyllium cation was first suggested on the basis of IR spectroscopic data, [4,5] but this interpretation was heavily doubted.…”

“…[2] Later, Bergstrom treated Be with NH 4 Cl in liquid ammonia and also obtained two products of the composition BeCl 2 ·2NH 3 and BeCl 2 ·4NH 3 . [3] That the compound BeCl 2 ·4NH 3 contains the tetraammineberyllium cation was first suggested on the basis of IR spectroscopic data, [4,5] but this interpretation was heavily doubted. [6] Biltz and co-workers found BeCl 2 adducts with two, four, six and twelve molecules of ammonia by tensieudiometric measurements.…”

“…here between Pna2 1 and Pnma. Thermogravimetric measurements show that [Be(ND 3 ) 4 ]Cl 2 decomposes only above approximately 175°C, giving off two equivalents of ND 3 to form [Be-(ND 3 ) 2 Cl 2 ]. The latter seems to be stable up to approximately 300°C after which it sublimes.…”