1635-63-8Relevant academic research and scientific papers
Supramolecular variations on a molecular theme: The structural diversity of phosphazenes (RNH)6P3N3 in the solid state
Bickley, Jamie F.,Bonar-Law, Richard,Lawson, Gavin T.,Richards, Philip I.,Rivals, Frederic,Steiner, Alexander,Zacchini, Stefano
, p. 1235 - 1244 (2007/10/03)
Herein, we introduce an extremely 'soft' tecton, which interacts via 'soft' synthons displaying an unprecedented variety of supramolecular architectures in the solid state. Hexakis(organoamino) cyclotriphosphazene derivatives, (RNH)6P3/su
Synthesis and hydrolysis of hexakis(imidazolyl)cyclotriphosphazene
Allcock,Fuller
, p. 2250 - 2256 (2007/10/02)
The reaction of imidazole with hexachlorocyclotriphosphazene (I) has yielded hexakis(imidazolyl)cyclotriphosphazene (II). Compound II has been studied as a model for the analogous linear high polymer which is a prospective biodegradable carrier macromolecule. Compound II is hydrolytically unstable and decomposes to hydroxyphosphazenes, imidazole, and phosphate in aqueous media. A kinetic analysis of the removal of the first imidazolyl group from II in unbuffered 20% aqueous tetrahydrofuran within the pH range of 6.5-7.8 has shown that the hydrolysis is autocatalyzed by the free imidazole liberated in this step. Initially, the displacement of imidazole is a first-order process with respect to [II], but the release of imidazole gives rise to faster, second-order reaction in which the rate depends on the first powers of [II] and [imidazole]. The evidence favors the influence of free imidazole as a general-base catalyst and not via the formation of hydroxide ion. N-Methylimidazole reacts with I to form an unusual series of highly reactive yellow salts of the general formula [N3P3Cl6-x(C4H6N 2)x]x+XCl (VII). The chemistry of II and VII is discussed in terms of its relationship to the synthesis and reactions of the analogous linear high polymeric phosphazenes.
Positional and cis-trans N-methylaminotriphosphonitriles. The use of H1 nuclear magnetic resonance in configurational analysis
Ford,Dickson,Bezman
, p. 890 - 893 (2007/10/05)
Through aminolysis with methylamine, phenylation with benzene in the presence of aluminum chloride, and a combination of both, a series of derivatives of trimeric phosphonitrilic chloride has been made. H1 nuclear magnetic resonance spectra were obtained for these compounds and used to determine both their positional and cis-trans configurations. The structural analysis is based on consideration of the number of chemical environments and the values of the coupling constants.
