REDUCTION OF INTERMOLECULAR ASSOCIATION IN THE STERICALLY ENCUMBERED (DICHLOROIODO)ARENE ARICL(2) ,6-BIS(3,5-DICHLORO-2,4,6-TRIMETHYLPHENYL)BENZENE]

The synthesis of the sterically encumbered (dichloroiodo)arene ArlCl(2 ) [Ar = ,6-bis(3,5-dichloro-2,4,6-trimethylphenyl)benzene] is achieved via a novel hexachlorination reaction and an X-ray structural determi nation reveals a reduced intermolecular association for the hypervalen t iodine species as compared to the only other crystallographically ch aracterized (dichloroiodo)arene PhlCl(2) (the structure of which is re -examined in light of the present data).