Fluorides iodine

Additions of halogen fluorides to the more electrophilic perfluonnated olefins generally require different conditions Reactions of iodine fluoride, generated in situ from iodine and iodine pentafluoride [62 102 103, /05] or iodine, hydrogen fluoride, and parapeiiodic aud [104], with fluormated olefins (equations 8-10) are especially well studied because the perfluoroalkyl iodide products are useful precursors of surfactants and other fluorochemicals Somewhat higher temperatures are required compared with reactions with hydrocarbon olefins Additions of bromine fluoride, from bromine and bromine trifluonde, to perfluonnated olefins are also known [lOti]... 

Substituted aryl hydrazones can be converted to geminal difluondes in satis factory yields by molecular fluorine [H4, iodine fluoride [ 5], and N bromo-suc-cinimide-pyridinium polyhydrogen fluoride or A -bromosuccinimide-polyvi-nylpyridinium polyhvdrogen fluoride [5(5] (equation 21) (Table 6)... 

Iodine fluoride is a more versatile reagent than molecular fluorine in geminal fluorination of other hydrazones and related compounds under milder reaction conditions [55] Substrates fluorinated include hydrazones of simple cyclic or steroidal ketones (e g, 4 tert butylcyclohexanone, 70%, 3 cholestanone, 70%), W methyl and A/N dimethylhydrazones [R2C=NNH(CH3) 70%, R2C=NNC(CH3)2, 50%], semicarbazones (R2C=NNHCONH2, 25-50%), and 2,4-dinitrophenylhy-drazones [R2C==NNH-C6H3-2,4(N02)2, 25-50%]... 

By using freshly preeipitated copper powder at 200 °C, perfluroallenes can be prepared by the elimination of bromine fluoride or iodine fluoride from the corresponding starting matenals [70] The reaction is carried out at low pressure, 1-2 mm of Hg, and the products quickly dimenze into cyclobutane derivatives (equation 39)... 

The three fluorides CIF5, Brp5 and IF5 are the only known hexa-atomic interhalogens, and IF7 is the sole representative of the octa-atomic class. The first to be made (1871) was IF5 which is the most readily formed of the iodine fluorides, whereas the more vigorous conditions required for the others delayed the synthesis of BrFs and IF7 until 1930/1 and CIF5 until 1962. The preferred method of preparing all four compounds on a large scale is by direct fluorination of the element or a lower fluoride ... 

Fluor-jod, n. iodine fluoride, -kalium, n. potassium fluoride, -kalzium, n. calcium fluoride, -kiesel, m. silicon fluoride, -kie-selsaure,/. fluosilicic acid, -kohlenstoff, m. carbon fluoride, -lithium, n. lithium fluoride. -metall, n. metallic fluoride, -natrium, n. sodium fluoride, -phosphat, n. fluophosphate. -phosphor, m. phosphorus fluoride, -salz, n. fluoride, -schwefel, m. sulfur fluoride, -selen, n. selenium fluoride, -silber, n. silver fluoride, -silikat, n. fluo-silicate. -silizium, n. silicon fluoride, -sili-ziumverbindung, /. fluosilicate. -tantal-sMure, /. fluotantalic acid, -tellur, n. tellurium fluoride, -titan, n. titanium fluoride, -toluol, n. fluorotoluene, fluotoluene. 

Clinical syndromes are associated with deficiencies of the following trace elements zinc, copper, manganese, selenium, chromium, iodine, fluoride, molybdenum, and iron. 

Heats of formation for a complete set of Group VILA fluorides are unavailable, but a set of xenon fluoride cations, isoelectronic with iodine fluorides, exhibits the alternating pattern expected for odd- and even-electron molecules. The original energy-level diagram for stepwise fluorine dissociation is shown in Fig. 5. The tabulated values were derived from the ionization energies of XeF and the threshold values for XeFJ — XeF, - + F, where n is even (27), together with heats of formation obtained by reaction calorimetry (137). 

Fluorination with Iodine Fluorides Bound to Polymers... 

This tendency towards disproportionation is common among the lower fluorides of iodine and bromine. The behavior of the four iodine fluorides presents a good picture of the factors important in the relative stabilities. Both IF and IFj tend to disproportionate (the former to the extent that it cannot be isolated), rot because of weakness in... 

In related work fluorine reacts with iodine in fluorotrichloromethane, and the iodine fluoride thus formed adds the elements of iodine and fluorine to olefins at -78 °C with full regio and stereoselectivity [67] Bromine-fluonnc on the other hand,... 

In a similar reaction, iodine fluoride also can be removed from perfluorobutyl-, perfluorohexyl-, and perfluorooctyl iodide by using zinc-copper couple in dimethyl sulfoxide or dimethylformamide [71]... 

Chlorine Dioxide See under Chlorine Oxides Chlorine Fluorides Although in 1891, H. Moissan (cited in Ref 2) easily prepd bromine iodine fluorides by direct action of the corresponding elements, he claimed that it was impossible to obt any chlorine fluoride. Other investigators among them Lebeau(1906, cited in Ref 2) and Ruff Zedner(1909 cited in Ref 2) also tried, but failed. It was not until 1928 that Ruff et al (Ref 3) succeeded in prepg the monocompd Chlorine Monofluoride, C1F, mw 54.46 colorless gas, fr p -154, bp 100.8, d 1.62 at -100° critical temp -14°, Q evapn 2.27 kcal/mol was prepd by action of si moist chlorine on fluorine at RT if the gases are dry they do... 

When chlorotrifluoroethylene is treated with iodine pentafluoride and two equivalents of iodine, the iodine fluoride generated adds across the double bond. In contrast to the expectation of a unidirectional addition, two products, M and N, are formed. What are they ... 

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