Hydrogen Bonds in Rubidium Amide‐Ammonia(3/2), RbNH₂·2/3NH₃

Abstract

Rubidium amide‐ammonia(3/2), RbNH2·2/3NH3, was synthesized from Rubidiumhydride, RbH, in liquid ammonia at −78 °C. The compound crystallizes in the cubic space group I213 with Z = 4, a = 10.0490(12) Å, and V = 1014.77(20) Å as isometric colorless crystals. The crystal structure was solved from single‐crystal X‐ray data. The structure contains a three‐dimensional network of amide anions and ammonia molecules, which are interconnected via hydrogen bonds.

Rb2[U(NH2)6], a Rubidium Hexaamidouranate(IV) obtained from the Reaction of UI3 with RbNH2 in Anhydrous Ammonia

“…[7][8][9][10][11][12][13] However, a catalyst must be present that lowers the kinetic barrier towards amide formation and H 2 evolution as otherwise solutions of these metals can be kinetically stable for years. [14][15][16] We may conclude that U III acted as a reducing agent under these conditions and produced solvated electrons which obvi-…”

“…Both phenomena are well known from solutions containing only alkali metals or the other metals that are soluble in ammonia . However, a catalyst must be present that lowers the kinetic barrier towards amide formation and H 2 evolution as otherwise solutions of these metals can be kinetically stable for years …”

Dissolving the insoluble: CdF2 and moist ammonia form cadmium(II) difluoride monohydrate—synthesis and crystal structure of [Cd(NH3)6]F2·H2O

“…[6,7]. F-HÁÁÁF [8][9][10][11][12] and N-HÁÁÁN [13][14][15][16] hydrogen bonding is much less investigated, and N-HÁÁÁF hydrogen bondingoutside of modified proteins-is comparatively little (12) 19(1) H(1A) 6c 1,980 (6) 3,350 (7) 768 (14) 31(6) H(1B) 6c 2,840(4) 3,650 (5) 1,488 (14) 30(7) H(1C) 6c 3,660(5) 5,410 (5) 1,018 (14) …”

Alkali and alkaline earth metals

“…The structure contains a threedimensional network of amide anions and ammonia molecules, which are interconnected via hydrogen bonds. 83 The reaction of potassium hexamethyldisilazide (KHMDS) with the bulky formamidine N(Diep)QC(H)NH(Diep) (Diep-FormH, Diep = 2,6-Et 2 C 6 H 3 ) in THF yielded the half deprotonated compound [K(DiepForm)(DiepFormH)], which exhibited suppressed reactivity with the hexamethyldisilazide anion. Preparation in the presence of the chelating solvents DME and PMDETA gave the fully deprotonated species [{K 3 (DiepForm) 3 (DME) 3 } n ] 3 and [{K(PMDETA)K(DiepForm) 2 } n ].…”