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An Accidental Discovery of a New Mixed‐Valent Iodine Compound − Crystal Structure of Difluoroiodato(V) Iodine(III) Dichloride [Cl 2 IOI(O)F 2 ]
Author(s) -
Minkwitz Rolf,
Berkei Michael
Publication year - 2001
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/1099-0682(200102)2001:2<457::aid-ejic457>3.0.co;2-v
Subject(s) - chemistry , monoclinic crystal system , iodine , raman spectroscopy , crystal structure , bond length , crystallography , molecule , crystal (programming language) , iodide , inorganic chemistry , organic chemistry , programming language , physics , computer science , optics
The crystal structure of the novel iodine compound Cl 2 IOI(O)F 2 is described. Cl 2 IOI(O)F 2 contains iodine in two different oxidation states (III) and (V) and can formally be described as ICl 2 + IF 2 O 2 − , linked by an unsymmetrical, nonlinear I−O−I bridge, with I−O bond lengths of 1.84(1) Å and 2.32(1) Å, and a bond angle of 122.5(5)°. It was accidentally obtained by the uncontrolled reaction between CF 3 I, CF 3 OCl, CF 2 O, and Cl 2 at −70 °C over a period of about six months and finally two days at room temperature. Cl 2 IOI(O)F 2 crystallises in the monoclinic space group P 2 1 / c with four formula units per unit cell with the dimensions a = 12.910(1), b = 6.987(1), c = 7.550(1) Å, and β = 94.890(1)°. The molecule was additionally characterised by its Raman and IR spectra.