Discuss the topic "Absorption Spectra of iodine in gas phase"
The strong absorption of iodine dissolved in paraffin hydrocarbons in the region of 2200 A—2600 A is not shown either by gaseous iodine or by iodine dissolved in perfluoroheptane (PFH) or di‐perfluorohexyl ether, and is present only to a much smaller extent for iodine dissolved in chloroform.The interaction of iodine with n‐heptane has been studied quantitatively in PFH solution. It is concluded that the above absorption is a charge transfer transition due to a very weak, or possibly collisional type, complex, and is not a solventshift of the N – V transition of the iodine molecule.