Heptane-1,7-diaminium sulfate mono­hydrate

The crystal structure of the title compound, C7H20N2 2+·SO4 2−·H2O, is presented, with particular focus on the packing arrangement in the crystal structure and selected hydrogen-bonding inter­actions that the compound forms. The crystal structure exhibits parallel stacking of the diammonium dication in its packing arrangement, together with inorganic–organic layering that is typical of these n-alkyl­diammonium salts. An intricate three-dimensional hydrogen-bonding network exists in the crystal structure where the hydrogen bonds link the cation and anion layers together through the sulfate anions and the water mol­ecules

Effect of the anion on cation chain geometry in hexamethylenediammonium salts

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Bis[(1,1'-biphenyl-2,2'-diyl)di-tert-butylphosphonium] di-l-chlorido-bis[dichloridopalladate(II)]

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A BRIEF HISTORY OF INFECTION CONTROL

This brief overview of the history of Infection Control draws attention to the many challenges that lie ahead. Although hospital infection control has been accepted in theory as an important and necessary discipline in most hospitals in the world, the practical application of the principles involved in such control are often conspicuous by their absence. There is need to convince the Health Authorities that money and time spent in the implementation of effective and efficient infection control programmes, is money and time well spent

Decane-1,10-diaminium dinitrate

The crystal structure of the title compound, C10H26N2 2+·2NO3 −, exhibits a back-to-back paired double-stacked packing arrangement culminating in an overall double zigzag pattern of the dications. Each pair of double-stacked dications is surrounded by a ring of ten nitrate anions. An intricate three-dimensional N---H...O and N---H...(O,O) hydrogen-bonding network exists in the crystal structure

Heptane-1,7-diaminium dinitrate

In the title molecular salt, C7H20N2 2+·2NO3 −, the crystal structure exhibits an unusual back-to-back paired double-stacked packing arrangement culminating in an overall double zigzag pattern of the dications. The nitrate anions form a ring around one pair of double-stacked dications. An intricate three-dimensional N—H⋯O and N—H⋯(O,O) hydrogen-bonding network exists in the crystal structure

Bis(acetonitrile-kN)dichlorido(h⁴-cycloocta- 1,5-diene)ruthenium(II) acetonitrile monosolvate

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Ethane-1,2-diammonium dibromide: a redetermination at 100 K

In the redetermined [for the previous study, see Søtofte (1976 ▶). Acta Chem. Scand. Ser. A, 30, 309–311] crystal structure of the title compound, C2H10N2 2+·2Br−, the H atoms have been located and the hydrogen-bonding scheme is described. The ethane-1,2-diammonium cation lies over a crystallographic inversion centre and straddles a crystallographic mirror plane with the C and N atoms in special positions. In the crystal, the cations and anions are linked by N—H⋯Br and N—H⋯(Br,Br) hydrogen bonds, which generate various ring and chain motifs including an R 10 5(32) loop

Butane-1,4-diammonium bis(perchlorate)

The butane-1,4-diammonium cation of the title compound, C4H14N2 2+·2ClO4 −, lies on a special position of site symmetry 2/m, whereas the perchlorate anion is located on a crystallographic mirror plane. An intricate three-dimensional hydrogen-bonding network exists in the crystal structure with each H atom of the ammonium group exhibiting bifurcated inter­actions to the perchlorate anion. Complex hydrogen-bonded ring and chain motifs are also evident, in particular a 50-membered ring with graph-set notation R 10 10(50) is identified