NH4[Re3Cl10(OH2)2] · 2 H2O: Synthese und Struktur Ein Beispiel für starke N?H …︁ O- und O?H …︁ Cl-Bindungen

NH₄Re₃Cl₁₀(OH₂)₂] · 2 H₂O: Synthesis and Structure. An Example for “Strong” N? H …? O and O? H …? Cl Hydrogen Bonding The red NH₄Re₃Cl₁₀(OH₂)₂] · 2 H₂O crystallizes from hydrochloric-acid solutions of ReCl₃ with NH₄Cl. It is tetragonal, P4₁2₁2, No. 92, a = 1157.6, c = 1614.5 pm, Z = 4. The crystal structure contains “isolated” clusters Re₃Cl₁₀(OH₂)₂]^?. These contain Cl…?H? O? H…?Cl units with “very strong” hydrogen bonds: distances Cl? O are only 286 pm. NH₄⁺ has seven Cl^? as nearest neighbours and, additionally, one H₂O which belongs to a cluster d(N? O1) = 271 pm] and one crystal water d(N? O2) = 286 pm].