Perfluorodioxoles, the Preparation Process Thereof, and Homopolymers and Copolymers Therefrom
US Patent: 5646223
Date: Jul. 8, 1997
Inventors: W. Navarrini, V. Tortelli, P. Colaianna, J. A. Abusleme
published July 8, 1997
published February 11, 1997
Phosphazene Derivatives and Use of Same as Stabilizers for Oils and Greases Based on Perfluoropolyethers
US Patent: 5602270
Date: Feb. 11, 1997
Inventors: P. Odello, W. Navarrini, R. D. Chambers, C. Corti
published December 31, 1996
posted in Patents - 1996
Fluorinated polymers and copolymers containing cyclic structures
US Patent: 5589557
Date: Dec. 31 1996
Inventors: Walter Navarrini, Vito Tortelli, Alessandro Zedda
published November 5, 1996
Perfluorodioxoles, the Preparation Process Thereof, and Homopolymers and Copolymers Obtained Therefrom
US Patent: 5571932
Date: Nov. 5, 1996
Inventors: W. Navarrini, V. Tortelli, P. Colaianna, J. A. Abusleme
published March 12, 1996
Perfluorodioxoles, the Preparation Process Thereof, and Homopolymers and Copolymers Obtained Therefrom
US Patent: 5498682
Date: Mar. 12, 1996
Inventors: W. Navarrini, V. Tortelli, P. Colaianna, J. A. Abusleme
published February 27, 1996
Perfluorodioxoles, the Preparation Process Thereof, and Homopolymers and Copolymers Obtained Therefrom
US Patent: 5495028
Date: Feb. 27, 1996
Inventors: W. Navarrini, V. Tortelli, P. Colaianna, J. A. Abusleme
published November 7, 1995
posted in Papers - 1995
EPR AND ENDOR OF PERFLUOROALKYL RADICAL INTERMEDIATES IN THE REACTION BETWEEN PERFLUOROHYPOFLUORITES AND PERFLUOROALKENES
Author(s): CONTI, F; CORVAJA, C; CREMONESE, F; NAVARRINI, W; TORTELLI, V
Source: JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS
Volume: 91 Issue: 21 Pages: 3813-3820
DOI: 10.1039/ft9959103813 Published: NOV 7 1995
ABSTRACT:
EPR and ENDOR spectra of the reaction products of sterically hindered perfluoroalkenes with perfluoromethyl hypofluorite and with the perfluoroether hypofluorite X(CF2O)(n)(CF2CF2O)(m)CF2OF, where X is either OCF3 or a second hypofluorite group OCF2-OF, have been recorded. Tertiary and secondary free radicals are produced by the addition to the alkene double bond of a fluorine atom or of the partner radical formed by the homolysis of the hypofluorite O-F bond. Analysis of the spectra reveals that hyperfine splitting by F-19 nuclei in the gamma and delta positions, and even further from the radical centre, contribute spectra. The alpha- and beta-F-19 hyperfine splitting are discussed in relation to the radical structure and conformation. The beta-F-19 splittings are accounted for by the well known equation a(F)(beta) = B cos(2)(theta); different values of the constant B have to be used according to the number of beta-fluorine substituents bonded to the same alpha-carbon.
http://pubs.rsc.org/en/Content/ArticleLanding/1995/FT/ft9959103813#!divAbstract
published October 6, 1995
posted in Papers - 1995
RELATIVE RATE CONSTANTS FOR THE REACTIONS OF CF3OF WITH OLEFINS IN SOLUTION
Author(s):NAVARRINI, W; RUSSO, A; TORTELLI, V.
Source: JOURNAL OF ORGANIC CHEMISTRY
Volume: 60 Issue: 20 Pages: 6441-6443
DOI: 10.1021/jo00125a033 Published: OCT 6 1995
ABSTRACT:
The addition reactions of CF3OF to chloro fluoro olefins have been studied in solution at low temperature (-78, -105 degrees C), and their relative rate constants have been determined using the kinetic approach of competition reactions. The reactivity and regio- and stereoselectivity are consistent with a free radical chain-propagating reaction in which the alkenes are attacked by the CF3O. radical generated by homolitic cleavage of the O-F bond in the CF3OF molecule.
http://pubs.acs.org/doi/abs/10.1021/jo00125a033
published September 1, 1995
posted in Papers - 1995
THE REACTION OF CF3OOCF2OF WITH FLUOROOLEFINS
Author(s): RUSSO, A; MONTANARI, V; NAVARRINI, W; DESMARTEAU, DD.
Source: JOURNAL OF FLUORINE CHEMISTRY
Volume: 74 Issue: 1 Pages: 83-87
DOI: 10.1016/0022-1139(95)03243-7 Published: SEP 1995.
ABSTRACT
The reaction of fluoroxydifluoromethyl trifluoromethyl peroxide, CF3OOCF2OF (1), with fluoroolefins leads to the formation of novel fluorinated peroxides as major products. When 1 was added to 1,2-dichloro-1,2-difluoroethylene, CFCl=CFCl, under controlled conditions,the formation of 4,5-dichloro-2,2,4,5-tetrafluoro-1,3-dioxolane was also observed. A mechanism is proposed to rationalize these results.
http://www.sciencedirect.com/science/article/pii/0022113995032437
published August 11, 1995
posted in Patents - 1995
Phosphazene derivatives and use of same as stabilizers for oils and greases based on perfluoropolyethers
US Patent: 5441655
Date: Aug. 08 1995
Inventors: Odello Paolo, Navarrini Walter,Chambers Richard D., Corti Costante
published May 15, 1995
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
published April 1, 1995
posted in Papers - 1995
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
published March 21, 1995
Process for Preparing Perfluoro-2-Methyl-4-Methoxypentane
US Patent: 5399779
Date: Mar. 21, 1995
Inventors: V. Tortelli, C. Tonelli, W. Navarrini, S. Fontana
published March 1, 1995
posted in Papers - 1995
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
published December 20, 1994
Process for Preparing Perfluoroalkoxysulphonic Compounds
US Patent: 5374770
Date: Dec. 20, 1994
Inventors: W. Navarrini, V. Montanari, A. M. Staccione
