N‐Methylimidazolkomplexe des Berylliums: [Be(Me‐Im)₄]I₂ und [Be₃(μ‐OH)₃(Me‐Im)₆]Cl₃

Abstract

Tetra(N-methylimidazole)-beryllium-di-iodide, [Be(Me-Im) 4 ]I 2 (1), was prepared from beryllium powder and iodine in Nmethylimidazole suspension to give yellow single crystal plates, which were characterized by X-ray diffraction and IR spectroscopy. Compound 1 crystallizes tetragonally in the space group I42d with four formula units per unit cell. Lattice dimensions at 100(2) K: a = b = 1784.9(1), c = 696.2(1) pm, R 1 = 0.0238. The structure consists of homoleptic dications [Be(Me-Im) 4 ] 2+ with short Be-N distances of 170.3(3) pm and iodide ions with weak interionic C-H···I contacts.

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

“…2 + with 1.734(6) , [57] for [BeA C H T U N G T R E N N U N G (Me-Im) 4 ] 2 + (Me-Im = N-methylimidazole) with 1.703(3) , [58] and for [BeA C H T U N G T R E N N U N G (SPh) 2 (py)A C H T U N G T R E N N U N G (NH 3 )] 2 (18-crown-6) with 1.724(4) and 1.731(4) . [59,60] Two chloride ions are present in the asymmetric unit of crystals of compound 1, Cl(1) residing at the 3a and Cl(2) at the 9b Wyckoff positions.…”

Recent Contributions to the Coordination Chemistry of Beryllium

“…[15] However,t his alwaysl eads to solvent coordinated complexesa nd can resulti nc ationic berylliumc omplexes (3)w hen strongly coordinatings olvents are used. [16] This renders these precursors inappropriate for studies with weakly coordinating ligands. Additionally,t his approach has not been extended to beryllium chloride.…”

“…Scheme1.Synthesis of solventa dducts of beryllium bromide andiodide from beryllium metal (a:X= Br,b:X= I). [13][14][15][16] Figure 1. Beryllium coordination compounds with monodentate O-donorligands.…”

“…Multinuclear complex cations with as ix-membered Be 3 O 3 core structure. [16,90,97,106,107] dinated beryllium speciesw ithouts terically very demanding ligands. [56] The fact that only slight changesi nt he counterion induce two different anionic forms-monomeric trichloroberyllate or dimerich exachlorodiberyllate-indicates that there are only marginal differences in the energy of these two ions.…”

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

“…Additionally, two chloride anions are present with Be-Cl distances of more than 3.75 Å. The Be-N bond lengths of the [Be(ND 3 [12] for [Be(iPr-N=C=N-iPr) 4 ] 2+ at 1.734(6) Å, [13] for [Be(Me-Im) 4 ] 2+ (Me-Im = Nmethylimidazole) at 1.703(3) Å, [14] for [Be(SPh) 2 (py)(NH 3 )] 2 -(18-crown-6) at 1.724(4) and 1.731(4) Å, [15,16] and [Be(NH 3 ) 4 ] 2+ at 1.725(1)-1.733(3) Å. [8] The N-Be-N angles observed are close to the tetrahedral ones and are between 106.9 (10) (1) and 109.6(1)°.…”