cas 335-70-6, 1,8-Diiodoperfluorooctane | Articles data ｜lookchem

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335-70-6

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TELOMERIZATION OF TETRAFLUOROETHYLENE AND HEXAFLUOROPROPENE: SYNTHESIS OF DIIODOPERFLUOROALKANES
Linear diiodoperfluoroalkanes are easily synthesized by thermal telomerization of tetrafluoroethylene with iodine.When hexafluoropropene reacts with I(C2F4)nI n = 2,3,4 as telogen, new diiodocompounds of formula I(C3F6)m(C2F4)n(C3F6)pI n = 2,3,4 m = 0,1,2 p = 1,2 are obtained.In both cases there are high yields, based both on iodine and on olefin.
Tortelli, V.,Tonelli, C.
p. 199 - 217
(1990)
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Preparation of α,ω-Diiodoperfluoroalkanes
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Bedford, Clifford D.,Baum, Kurt
p. 347 - 348
(1980)
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A Convenient One-Stage Synthesis of Some Diiodoperfluoroalkanes By Using Tetrafluoroethylene Derived From Poly(tetrafluoroethylene) Waste
Tetrafluoroethylene was prepared by a thermal depolymerization of poly(tetrafluoroethylene) waste.The gaseous mixture containing 95-97percent tetrafluoroethylene has been used without further purification in a direct reaction with iodine to synthesize some α,ο-diidoperfluoroalkenes at temperature 285+/-5 deg C for 8 h.Stoichiometric one to one ratio of the reagents has been found to produce higher diidoperfluoroalkenes yield per unit reaction volume than synthesis in the presence of an excess of tetrafluoroethylene.This approach provides a rapid one-pot procedure to these valuable reagents without any dangerous step.
Kotov, Stefan V.,Ivanov, Georgi D.,Kostov, Georgi K.
p. 293 - 296
(1988)
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Process for manufacturing diiodoperfluoroalkanes
The present invention involves a process for the manufacture of α,ω-diiodoperfluoroalkanes of the formula I ― (CF2CF2)n ― I, wherein n is an integer between 2 and 6. The latter compounds are produced at relatively high conversions and under relatively mild reaction temperatures and pressures, compared to prior art processes, by the elimination of the gaseous byproduct perfluorocyclobutane throughout the process.
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Page column 4

(2008/06/13)

SOLVENT EFFECTS IN BETWEEN PERFLUOROALKYLIODIDES AND CADMIUM
The interaction between perfluoroorgano iodides (RfI where Rf = F(CF3)2C(CF2CF2)3, n-C6F13, n-C8F17, F(CF3)2COCF2CF2, F(CF3)2CO(CF2CF2)4 and C2H5OC(O)(CF2CF2)2OCF2CF2) with cadmium in an acetonitrile solvent media produces primarily the coupled products (RfRf, 72-90percent yield) in addition to minor quantities of the reduction products (RfH).On the other hand ICF2CF2I and ClCF2CFClI, by a 1,2-dehalogenation reaction, from the olefins CF2=CF2 and CF2=CFCl, respectively, as the principal products.The interaction of RfI compounds with cadmium in other solvent media, e.g. diethyl ether, tetrahydrofuran (YHF)), N,N-dimethylformamide (DMF), and bis(2-methoxyethyl)ether(diglyme) were examined and found to produce a different ratio of RfRf and RfH products.
Chen, Grace J.,Tamborski, Christ
p. 123 - 140
(2007/10/02)

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Chemical Properties

Melting Point: 73-77 °C(lit.)
Boiling Point: 222 °C at 760 mmHg
Flash Point:98.5 °C
Density: 2.287g/cm³
Solubility:Chloroform (Slightly), Methanol (Slightly)
Storage Temp.:2-8°C
PSA: 0.00000
LogP: 6.85380

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