14219-60-4Relevant articles and documents
Studies on the Polyhalides, V. Preparation and Crystal Structure of I8
Tebbe, Karl-Friedrich,Freckmann, Bernhard
, p. 542 - 549 (2007/10/02)
The new compound I8 crystallizes monoclinically in the space group P 21/m with a = 959.0 pm, b = 835.4 pm, c = 1301.1 pm, β =103.37 deg and Z = 2 formula units.The crystal structure has been solved by 'direct methods' and refined to R = 0,057 with 1357 observed reflections.The structure consists of quadratically coordinated cations (2+) and planar, Z-shaped and completely ordered octaiodide anions I8(2-).According to the sequence of interatomic distances d(I-I) = 259.0 pm, 289.9 pm, 336.2 pm, 279.1 pm, 327.0 pm, 339.3 pm, 273.8 pm the anions may be described as .The iodide-iodine sides (I(-)*I2) are joined with the distance d(II) = 364.1 pm to a slightly bent triiodide chain being part of an octaiodide ribbon .Next contact spacings between neighboring anions start at d(II) = 403.7 pm. - Key words: Palladium Complex, Polyhalide, Octaiodide Ion, Iodine Chain, Crystal Structure