1999
DOI: 10.1021/ma9815096
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Thermal Polymerization of Hexakis(pyridinoxy)cyclotriphosphazenes:  Ring-Opening Polymerization of Ring-Strain-Free Cyclic Trimers Fully Substituted by Organic Groups

Abstract: Thermal polymerization of cyclotriphosphazenes fully substituted with 2-, 3-, and 4-pyridinoxides have been attempted both in the solid state and in solution. Among these ring-strain-free trimeric isomers, hexakis(3-pyridinoxy)cyclotriphosphazene (1) did not undergo polymerization either in the solid state or in solution, but 4-pyridinoxy (2) and 2-pyridinoxy analogues (3) have been found to undergo polymerization at 150 and 200 °C, respectively, in the absence of any catalyst. In particular, the thermal solut… Show more

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Cited by 22 publications
(9 citation statements)
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“…The cyclotriphosphazene, N 3 P 3 Cl 6 (Aldrich) and 2-hydroxy-4-methylpyridine (Aldrich) were used as received. The ligand L was prepared by a literature method 16 and [Ag(CH 3 CN) 4 ]PF 6 following the method described for the analogous copper complex. 17 Microanalyses were performed by the Campbell Microanalytical Laboratory, University of Otago.…”
Section: Methodsmentioning
confidence: 99%
See 1 more Smart Citation
“…The cyclotriphosphazene, N 3 P 3 Cl 6 (Aldrich) and 2-hydroxy-4-methylpyridine (Aldrich) were used as received. The ligand L was prepared by a literature method 16 and [Ag(CH 3 CN) 4 ]PF 6 following the method described for the analogous copper complex. 17 Microanalyses were performed by the Campbell Microanalytical Laboratory, University of Otago.…”
Section: Methodsmentioning
confidence: 99%
“…The geometry about the Cu(1) atom is best described as elongated rhombic octahedral and is comparable to that observed in the six coordinate sites of 1. 14 The axial bonds Cu(1)-N (16) and Cu(1)-N(46) of 2.482(3) and 2.467(3) A ˚are the longest Cu-N contacts and these arise from non-geminal pyridyl nitrogen atoms from opposite sides of the phosphazene ring. These bonds are significantly shorter than the axial bonds in 1 [2.509(3) and 2.559(3) A ˚].…”
Section: X-ray Crystallography [Culcl 2 ] (2)mentioning
confidence: 99%
“…E-mail: tsedaghat@scu.ac.ir ligands based on cyclophosphazene platforms is an extremely interesting area [4][5][6][7][8][9]. An interest in these ligands comes from their ability to readily extend the small molecule chemistry to appropriate high polymers such as corresponding polyphosphazenes [2,[10][11][12][13]. These metal-rich phosphazene polymers have potentially desirable properties as, for example, catalysis, conductors or drug delivery systems [6,[14][15][16].…”
Section: Introductionmentioning
confidence: 99%
“…The major reasons for this attention are the rich chemistry of substitution in the P-Cl bonds of chlorocyclophosphazenes by a variety of nucleophiles with associated stereo-and regiochemical effects, and the ring opening and polymerization of N 3 P 3 Cl 6 to linear dichlorophosphazene with subsequent nucleophilic reactions at phosphorus sites of the polymer [6][7][8][9][10]. In fact the reactions carried out on the halocyclophosphazenes to a large extent serve as models for similar reactions on the polymeric analogues [11][12][13][14]. These polymeric materials have been intended for a variety of commercial applications.…”
Section: Introductionmentioning
confidence: 99%