Les phases cyanures de nickel(II) hydratés

Abstract

A critical study of the preparation and properties of the hydrated forms of Ni cyanide shows the existence of three different phases in the compounds Ni(CN)2•xH2O.•By X-ray diffraction and u.v.–visible spectroscopy, it is found that all three phases are formed by different stacking of polymeric [Ni(H2O)2Ni(CN)4]∞ layers similar to the [Ni(NH3)2Ni(CN)4]∞ layers existing in Ni amminocyanides, with interlamellar noncoordinated H2O molecules. All three phases are indexed in the orthorhombic system and can be given as Ni(H2O)2Ni(CN)4•yH2O.