Difluoramines, chemistry

Refs 1) Thiokol Chemical Corp, Reaction Motors Div, "Difluoramine Chemistry ,... 

Refs 1) Thiokol Chemical Corp, Reaction Motors Div, "Difluoramine Chemistry", RMD Rept 076-S-62 (l Jan to 31 Dec 1962) [Contract NOnr 1878(00)] (Conf) 2) B.J. Levy, "A Study of the Explosion Limits of Simple Difluoramino Compounds", Atlantic-ResCorp Quarterly Tech Summary Rept 4 (1 Jan to 31 March 1964) and Quarterly Tech Summary Rept 9 (1 April to 30 June 1965) [Contract NOnr 4065(00)] (Conf)... 

This section will review a variety of experimental results arising from this renaissance period in difluoramine chemistry. 

Although its difluoramination chemistry is straightforward, a relatively recent preparation of an NF2-substituted polymer (a binder ingredient candidate) was reported by Jiang et al. (Hubei Redstar Chemical Institute, China) [99]. 4,4-Bis(difluoramino)pentyl glycidyl ether polymer was prepared by reaction of 4,4-bis(difluoramino)pentanol with epichlorohydrin followed by homopolymerization of the resiflting oxirane ether monomer (Scheme 10) or copolymerization with THE... 

The chemistry of difluoramines of the type X—NF has been studied to gain an understanding of the nature of the N—F and N—X bonds, to obtain a picture of the relative electron distributions in X—NFg compounds, and to determine the existence and stabilities of N—F radicals and ions. These compounds have been studied using electrochemistry, com-plexation, infrared spectroscopy, and theoretical calculations. Oxidation-reduction reactions have been carried out, and the effects of various environments on the N—F and N—X bonds have been investigated. The results of these studies emphasize the chemistry of difluoramine and the existence and stability of NFf+, NFg, NFg, and HgNFg+. 

Contents . Fluorides and Oxyfluorides of Sulphur (G. H. Cady) Some Novel Aspects of Fluorine Chemistry (R. Boschan) Trifluoro-acetic Anhydride Properties and Uses (R. E. A. Dear) Chemistry of Bis(trifluoromethyl) nitroxide, Bis(trifluoromethyl)hydroxylamine, and Mercury(ii) Bis(trifluoromethyl) nitroxide (D. P. Babb and J. M. Shreeve) Alkylation Reactions of Difluoramine (K. Baum) Direct Liquid Phase Fluorination of Organic Compounds (V. Grakauskas). 

Abstract This article reviews recent developments in synthesis and characterizations of organic difluoramine (NF2) derivatives since the 1980s. Specific classes of chemical compounds are covered cyclic difluoramino-nitramines, especially gem-bis(difluoramino)-substituted analogs of conventional nitramines products from the relatively new transformation of elec-trophUic difluoramination other classes of difluoramines such as polymers, plasticizers, and compounds not otherwise categorized. Also covered are aspects of other recently developed synthetic methodology to prepare compounds in this general class, as well as purely theoretical treatments of the chemistry and properties of this class. 

The compounds mentioned in this subsection are examples of specific classes not otherwise reviewed above, and specifically examples that have a structural feature not commonly encoimtered in the conventional chemistry of difluoramines or compoimds that show prospective new applicability. 

---