Lamellare Schichten auf der Grundlage von Wasserstoffbrücken und π-Stapelung: Kristallstrukturen der Komplexe [Mg(H2O)6]Z2 und [Be(H2O)4]Z2?2 H2O mit Z- = C6H4(SO2)2N-: Metallsalze des Benzol-1, 2-di(sulfonyl)amins. 8 [1, 2]

Abstract

Inhaltsübersicht. Die im Titel genannten Komplexe wurden durch Tieftemperatur-Röntgenbeugung charakterisiert (beide triklin, Raumgruppe P1, Z ϭ 1 für M ϭ Mg, Z ϭ 2 für M ϭ Be). Die Strukturen bestehen aus nichtkoordinierenden ortho-Benzoldisulfonimid-Anionen und oktaedrischen [Mg(H 2 O) 6 ] 2ϩ -Kationen mit Inversionssymmetrie bzw. aus tetraedrischen [Be(H 2 O) 4 ] 2ϩ -Kationen nebst zwei nichtkoordinierenden Wassermolekülen. In beiden Fällen sind die Komponenten unter Einsatz sämtlicher OϪH-Wasserstoffbrückendonoren zu einem zweidimen- Abstract.The crystal structures of the title complexes (both triclinic, space group P1, Z ϭ 1 for M ϭ Mg, Z ϭ 2 for M ϭ Be) have been determined by low-temperature X-ray diffraction. They consist of non-coordinating ortho-benzenedisulfonimide anions and, respectively, inversion-symmetric octahedral [Mg(H 2 O) 6 ] 2ϩ cations or tetrahedral [Be(H 2 O) 4 ] 2ϩ cations and two non-coordinating water molecules. In both structures, all OϪH hydrogen bond donor groups are used to associate the components into two-dimensional assemblies comprising an internal polar lamella of metal cations, (SO 2 ) 2 N groups and water molecules, and hydrophobic pe-

Perturbation of Local Solvent Structure by a Small Dication: A Theoretical Study on Structural, Vibrational, and Reactive Properties of Beryllium Ion in Water

“…The ab initio results show an average O−O distance between first- and second-shell water molecules of 2.619 Å. This value is consistent with a published crystal structure of [ o -benzenedisulfonimide]2[Be(H 2 O) 4 ]·3H 2 O, which has solvent water molecules coordinated to three of the first-shell water molecules at an average distance of 2.674 Å . The subsequent O−O distances among the second-sphere water molecules are slightly longer, showing an average of 2.636 Å.…”

A new silver–silver-bonded dimer complex: solid-state structure of bis[μ-2H-1,3-benzoxazine-2,4(3H)-dionato]disilver(I)

“…2) shows that the BOD ligands are packed parallel to each other, and the perpendicular distance between the benzoxazinone rings is 3.246 Å . This distance is common forinteractions (Nozary et al, 2002;Yajima et al, 2003;Subramanian et al, 2004;Moers et al, 2002;Blake et al, 1997) and indicates that the -electronic systems of the BOD ligands can interact with each other. However, in this case there is nooverlap, as the benzoxazinone rings are displaced.…”