Journal of Chemical Crystallography

, Volume 25, Issue 12, pp 857–862 | Cite as

Crystal and molecular structure of 1-chloro-1,2-benziodoxolin-3(1H)-one·tetra-n-butylammonium chloride

  • Gerald F. Koser
  • David B. McConville
  • Ghada A. Rabah
  • Wiley J. Youngs
Article

Abstract

The title compound,6, a novel 1∶1 complex of 1-chloro-1,2-benziodoxolin-3(1H)-one (5) andtetra-n-butylammonium chloride, was prepared from tetra-n-butylammoniumo-iodoxybenzoate (7) and acetyl chloride. A single crystal of6 was subjected to X-ray analysis: triclinic, space group\(P\bar 1;\)a=10.239(2),b=11.518(2),c=11.523(3)Å; α=73.20(2); β=87.85(2), γ=87.72(2)°; R1=0.0326. The most notable structural feature of crystalline6 is the existence of a “secondary” bond [I· ·Cl(2), 2.943(1)Å] between the chloride ion and the iodine atom of the chlorobenziodoxolinone moiety. Further coordination at iodine includes three primary bonds: I−C [2.115(4) Å], I−O [2.145(3) Å], I−Cl(1) [2.454(1) Å]. The entire 1-chlorobenziodoxolinone-chloride sub-structure is planar and exhibits iodine-centered bond angles of 78.8(1)° [C−I−O], 92.0(1)° [C−I−Cl(1)], 97.6(1)° [Cl(2)−I−O] and 91.6(1)° [Cl(2)−I−Cl(1)]. The unit cell of6 contains two loosely packed formula units. The chlorobenziodoxolinone-chloride sub-structures occupy a common plane and exhibit a centrosymmetric relationship, while the tetra-n-butylammonium ions are situated one above and one below the plane. Bonding at the iodine atom in6 is more consistent with a 10-I-3 species electrostatically associated with the chloride ion than a 12-I-4 species such as the tetrachloroiodate ion.

Key Words

1-Chloro-1,2-benziodoxolin-3(1H)-one·tetra-n-butylammonium chloride 1-chlorobenziodoxolinone-chloride γ3-iodane X-ray structure 

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Copyright information

© Plenum Publishing Corporation 1995

Authors and Affiliations

  • Gerald F. Koser
    • 1
  • David B. McConville
    • 1
  • Ghada A. Rabah
    • 1
  • Wiley J. Youngs
    • 1
  1. 1.Department of ChemistryThe University of AkronAkron

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