Brief introduction of

Reference of 375-80-4, As we all know, there are many different methods for the synthesis of a compound, and people can choose the synthesis method that suits their own laboratory according to the actual situation. 375-80-4 name is 1,6-Diiodoperfluorohexane, This compound is widely used in many fields, so it is necessary to find a new synthetic route. The downstream synthesis method of this compound is introduced below.

Example 11Purification of dodecafluoro-l,6-diiodohexane (m=3) (via gas/solid)20 mg of dodecamethonium iodide and 100 mg of dodecafluoro-l,6-diiodohexane of 98% purity (sold by Sigma-Aldrich) were put into two different open test tubes. Both said open test tubes were promptly put into a chamber, which was immediately closed. The dodecafluoro- 1,6-diiodohexane, being very volatile, expand inside the closed chamber, thus contacting the solid dodecamethonium iodide. Once the dodecafluoro- 1,6-diiodohexane was left to spread for 6 hours at room temperature, the formation of a yellow solid was observed which was extracted from the chamber, washed with CCU and dried under vacuum. On the solid thus obtained, 1H and 19F NMR tests were carried out in the presence of (CFaCH2O)2 as internal standard; such tests confirmed the formation of an adduct composed of two compounds in 1 :1 ratio. An XRD test was performed on the adduct crystal which confirmed the exclusive presence of dodecamethonium iodide and dodecafluoro- 1,6-diiodohexane and allowed to observe the same crystalline phase of the adduct obtained in Example 3.The dodecafluoro- 1,6-diiodohexane was then separated from the sequestering agent by sublimation of the crystalline adduct under vacuum at a temperature of about 500C and recovered by recondensation at a temperature of about -1980C.It was then possible to further purify the dodecafluoro- 1,6-diiodohexane available on the market with a 98% purity to dodecafluoro- 1,6-diiodohexane with a 100% purity, through a process of the invention from gas phase on solid phase, thus obtaining the same optimal results of the process of the invention from liquid phase.

At the same time, in my other blogs, there are other synthetic methods of this type of compound, 1,6-Diiodoperfluorohexane, and friends who are interested can also refer to it.

Reference:
Patent; Politecnico di Milano; WO2009/7302; (2009); A2;,
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com