title: Crystal structure of cis-diamminebis(nitrito-κN)platinum(II).
abstract: Single crystals of cis-[Pt(NO2)2(NH3)2], were obtained by means of hyper-saturation directly out of a plating electrolyte. The square-planar coordination environment of the divalent Pt(II) atom is formed by four N atoms belonging to two ammine and two monodentate nitrite ligands. The ligands adopt a cis configuration. The crystal structure contains stacks of close-packed mol-ecules which run parallel to [001]. There are nine crystallographically independent inter-molecular N-H⋯O hydrogen bonds, resulting in a hydrogen-bonded hxl-type framework in which each mol-ecule serves as an eight-connected node. Four of the nine distinct hydrogen bonds connect complexes which belong to the same close-packed column parallel to [001]. In contrast to the previously reported crystal structure of the trans isomer, the title structure does not display intra-molecular hydrogen bonding.
authors.affiliation: University of Innsbruck, Institute of Mineralogy & Petrography, Innrain 52, A-6020 Innsbruck, Austria.
authors.forename: Volker
authors.initials: V
authors.lastname: Kahlenberg
authors.affiliation: University of Innsbruck, Institute of Pharmacy, Innrain 80, 6020 Innsbruck, Austria.
authors.forename: Thomas
authors.initials: T
authors.lastname: Gelbrich
authors.affiliation: University of Innsbruck, Institute of Mineralogy & Petrography, Innrain 52, A-6020 Innsbruck, Austria.
authors.forename: Richard
authors.initials: R
authors.lastname: Tessadri
authors.affiliation: MED-EL Medical Electronics, Fürstenweg 77a, A-6020 Innsbruck, Austria.
authors.forename: Frederik
authors.initials: F
authors.lastname: Klauser
keywords: cis-isomer; crystal structure; hydrogen bonding; platinum(II); topology