1213-82-7Relevant academic research and scientific papers
The Reaction of Iodine Monochloride with Polycyclic Aromatic Compounds: Polar and Electron Transfer Pathways
Turner, Dean E.,O'Malley, Robert F.,Sardella, Dennis J.,Barinelli, Lucio S.,Kaul, Pushkar
, p. 7335 - 7340 (1994)
Several polycyclic aromatic hydrocarbons were treated with iodine monochloride.Although iodination is the predominant reaction of benzenoid arenes, chlorination is the sole reaction with anthracene, phenanthrene and naphthalene compounds (except for 5), whose oxidation half-wave potentials are less than 1.58 V vs Ag/Ag(+) (0.1 M).Arenes with higher potentials are unreactive.Naphthalene (9) and its derivatives with mild electron-withdrawing substituents are chlorinated; the exception (5) yields the 1-iodo product (21).The reaction is first order in substrate and second order in ICl.An electron transfer pathway involving radical cation intermediates is assumed.Ion-pair collapse of the radical cation-ICl intermediates is proposed for the chlorinations and radical-pair collapse for the iodination.
Sulphuryl Chloride as an Electrophile. Part 5. Chlorination of Some Anthracene Derivatives; Molecular Orbital Modelling of Substituent Effects
Bolton, Roger,Hibbert, Brynn D.,Parand, Simin
, p. 981 - 984 (2007/10/02)
The rates of electrophilic attack at C-10 of some 9-substituted anthracenes (9-H, Br, CHO, CN, NO2, OMe, or Bz) by sulphuryl chloride have been measured (in PhCl 298 K).The substituent effects roughly parallel those expected from considering the simpler p-XC6H4 system (ρ -1.51; r 0.975); better agreement (ρ -1.23 +/- 0.05; r 0.994) comes by using Dewar's FMMF treatment.MNDO calculations of the energy and optimised geometry of the intermediate ?-complex show a folded structure which allows a degree of sp3 character of the C-10 atom while maintaining sufficient delocalisation of the extended ?-system in the anthracenium ion.The Bell-Eyring-Polyani principle is followed with a linear correlation between the difference in the calculated energy between each reactant and its ?-complex and the experimentally observed change in free energy during attack by Clδ+.
