THE ADDITION OF TRIFLUOROMETHYLHYPOFLUORITE TO HEXAFLUOROPROPENE DIMERS

Author(s): CORVAJA, C; CREMONESE, F; NAVARRINI, W; TONELLI, C; TORTELLI, V.

Source: TETRAHEDRON LETTERS

Volume: 36 Issue: 20 Pages: 3543-3546

DOI: 10.1016/0040-4039(95)00553-O Published: MAY 15 1995

ABSTRACT:

The reaction of trifluomethylhypofluorite with the two anionic dimers of hexafluoropropene leads to the trifluoromethylether adducts in excellent yield. The radical intermediates of the reaction have been detected using the EPR technique.

http://www.sciencedirect.com/science/article/pii/004040399500553O

NOVEL MOLECULES AND INDUSTRIAL-PROCESSES INSPIRED BY CADY,G.H. RESEARCH ON HYPOFLUORITES

Author(s):DESMARTEAU, DD; NAVARRINI, W; ZEDDA, A; RUSSO, A; MONTANARI, V.

Source:JOURNAL OF FLUORINE CHEMISTRY

Volume: 71 Issue: 2 Pages: 169-170

DOI: 10.1016/0022-1139(94)06008-A Published: APR 1995

http://www.sciencedirect.com/science/article/pii/002211399406008A

A new approach to the synthesis of 2,2-difluoro-1,3-dioxolanes

 

 

Author(s):NAVARRINI, W;BRAGANTE, L;FONTANA, S;TORTELLI, V; ZEDDA, A.

Source:JOURNAL OF FLUORINE CHEMISTRY

Volume: 71 Issue: 1 Pages: 111-117

DOI: 10.1016/0022-1139(94)03167-X Published: MAR 1995

ABSTRACT:

A direct and versatile way to prepare halogenated 2,2-difluoro-1,3-dioxolanes through the addition of bis-(fluoroxy)difluoromethane (BDM) to halogenated alkenes (CF2=CFCF3, CF2=CFOCF2CF3, CF2=CHCF3, CF3CF=CFCF3, CFCl=CFCl, CFBr=CFBr, CCl2=CCl2, CHCl=CCl2, CHCl=CHCl, CH2=CHCl, CF2=CFCl, (CF3)(2)CFCF=CFCF3, CF2=CFBr, CF2=CF2) has been discovered.

http://www.sciencedirect.com/science/article/pii/002211399403167X

MODEL COMPOUNDS AND MONOMERS DERIVED FROM 1,1-DIFLUOROETHENE

Author(s):CHAMBERS, RD; APSEY, GC; ODELLO, P; MOGGI, G; NAVARRINI, W.

Source:MACROMOLECULAR SYMPOSIA

Volume 82, Issue 1, pages 33-50, May 1994

ABSTRACT:

Saturated model compounds, related to elastomers that are derived from co-polymers of CH2=CF2/CF2=CFCF3, have been synthesised and studied. Unsaturated compounds were obtained by both base- and Lewis-acid induced processes. Some reactions with antimony pentafluoride lead to remarkably stable carbocations, and even di-cations, and the nmr data for these systems is revealing about structure. Polyconjugated polymers may be obtained by this procedure. Preliminary studies are described, relating to the incorporation of crowded monomers into fluorocarbon polymers, ultimately, as a means of initiating cross-linking processes for curing elastomers.

http://onlinelibrary.wiley.com/doi/10.1002/masy.19940820105/abstract;jsessionid=E7184FE1AA06A64E7389B89E95CFDEFC.f02t03

NOVEL MOLECULES AND INDUSTRIAL-PROCESSES INSPIRED BY CADY,G.H. RESEARCH ON HYPOFLUORITES

Author(s): DESMARTEAU, DD ; NAVARRINI, W; ZEDDA, A; RUSSO; MONTANARI, V

Source: ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY

Volume: 207 Pages:12 FLUOPart:1Published: MAR 13 1994

Electrochemical Behavior and EPR of Radical Anions of Perfluoroalkyl-Substituted Olefins

Carlo Corvaja, Giuseppe Farnia, Gianni Formenton, Walter Navarrini, Giancarlo Sandona, Vito Tortelli

Source: JOURNAL OF PHYSICAL CHEMISTRY

Volume: 98 Issue: 9 Pages: 2307-2313

DOI: 10.1021/j100060a017

ABSTRACT:
Some perfluoroalkylolefins are shown to undergo electrochemical one-electron reduction to the corresponding radical anions at potential values which strongly depend on the structure of the substituents. In these cases the voltammetric reduction peak is chemically reversible, and a further one-electron transfer, affording the corresponding dianions, is detected at more negative potentials. For these substrates, at appropriate temperatures, the free radical anions are stable enough to be accumulated by macroscale electrolysis and investigated by EPR. The spectra are characterized by fairly large hyperfine couplings of F-19 in alpha, beta, and gamma positions relative to the pi carbon centers and by line width effects due to restricted rotations of the perfluoroalkyl groups around the C-C single bonds. The case of tetrakis(trifluoromethyl)ethylene has been analyzed in detail, and it is concluded that the rotation motion of the four trifluoromethyl groups should be in part correlated.
http://pubs.acs.org/doi/abs/10.1021/j100060a017

PERFLUORO OXAZIRIDINES, OXAZETIDINES, AND DIAZIRIDINES IN RING-OPENING COPOLYMERIZATION

Author(s): NAVARRINI, W (NAVARRINI, W); DESMARTEAU, DD (DESMARTEAU, DD)

Source: ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY.

Volume: 207 Pages: 12-FLUO Part: 1 Published: MAR 13 1994.