Darstellung und Struktur von Phosphazenylcyclophosphazenen / Synthesis and Structure of Phosphazenylcyclophosphazenes

Abstract

<jats:title>Abstract</jats:title><jats:p> Various phosphazenylcyclophosphazenes N<jats:sub>3</jats:sub>P<jats:sub>3</jats:sub>Xn(N = PA<jats:sub>3</jats:sub>)<jats:sub>6-n</jats:sub> with X = Cl, F, A = Me, Ph, NMe<jats:sub>2</jats:sub>, OEt, OPr<jats:sup>i</jats:sup>, OBut<jats:sup>n</jats:sup> and n = 1-3 were obtained by desilylation methods. Chemical and spectroscopical properties dependent on the substituents are discussed. Isomers of di-and tri-substituted compounds were isolated and their structures elucidated by NMR spectroscopy.</jats:p>

Molecular structures of cyclic mono- and di-(phosphoranylidene)aminophosphazenes: small-molecule models for high polymers

“…Most of the structural features of molecules 6a and 6b are similar. The average ring P-N bond distance for 6a is 1.578( 1 1) 8, and for 6b is 1.580 (11) A. For molecule 6a the mean length of P(3)-N(3) and P(3)-N(2) is 1.589(6) A; P( i)-N(3) and P(2)-N (2) are the shortest bonds in the ring with an average length of 1.565 (7) A.…”

“…The nearest ring nitrogen atom is N(3). Propylamino nitrogen atom N (11) is the nearest acyclic nitrogen to that chlorine atom. The exocyclic P-N bonds which join the propylamino groups to the phosphazene ring have a mean distance of 1.649(23) A.…”