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      Novel Approach for the Synthesis of Chlorophosphazene Cycles with a Defined Size via Controlled Cyclization of Linear Oligodichlorophosphazenes [Cl(PCl 2=N) n–PCl 3] +[PCl 6]

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          Abstract

          Despite a significant number of investigations in the field of phosphazene chemistry, the formation mechanism of this class of cyclic compounds is still poorly studied. At the same time, a thorough understanding of this process is necessary, both for the direct production of phosphazene rings of a given size and for the controlled cyclization reaction when it is secondary and undesirable. We synthesized a series of short linear phosphazene oligomers with the general formula Cl[PCl2=N]n–PCl 3 +PCl 6 and studied their tendency to form cyclic structures under the influence of elevated temperatures or in the presence of nitrogen-containing agents, such as hexamethyldisilazane (HMDS) or ammonium chloride. It was established that linear oligophosphazenes are inert when heated in the absence of the mentioned cyclization agents, and the formation of cyclic products occurs only when these agents are involved in the process. The ability to obtain the desired size phosphazene cycle from corresponding linear chains is shown for the first time. Known obstacles, such as side interaction with the PCl 6 counterion and a tendency of longer chains to undergo crosslinking elongation instead of cyclization are still relevant, and ways to overcome them are being discussed.

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          “Living” Cationic Polymerization of Phosphoranimines as an Ambient Temperature Route to Polyphosphazenes with Controlled Molecular Weights

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            Preparation of Star-Branched Polymers with Cyclotriphosphazene Cores

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              • Record: found
              • Abstract: not found
              • Article: not found

              Liquid crystalline side-chain phosphazenes

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                Author and article information

                Contributors
                Role: Academic Editor
                Journal
                Int J Mol Sci
                Int J Mol Sci
                ijms
                International Journal of Molecular Sciences
                MDPI
                1422-0067
                31 May 2021
                June 2021
                : 22
                : 11
                Affiliations
                [1 ]Faculty of Petrochemistry and Polymer Materials, Mendeleev University of Chemical Technology of Russia, Miusskaya sq. 9, 125047 Moscow, Russia; mikgorlov@ 123456gmail.com (M.G.); nbredov@ 123456muctr.ru (N.B.); aesin@ 123456muctr.ru (A.E.); isirotin@ 123456muctr.ru (I.S.); kireev@ 123456muctr.ru (V.V.K.)
                [2 ]Taurida Academy, Department of Biochemistry, V. I. Vernadsky Crimean Federal University, Prospekt Akademika Vernadskogo 4, 295007 Simferopol, Russia; genepcr@ 123456mail.ru
                Author notes
                [* ]Correspondence: soldat89.89@ 123456gmail.com
                Article
                ijms-22-05958
                10.3390/ijms22115958
                8199110
                34073083
                © 2021 by the authors.

                Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license ( https://creativecommons.org/licenses/by/4.0/).

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