ChemInform Abstract: X‐Ray Structural Analysis of the Ethylation Product of 1‐(Trimorpholinophosphazido)‐2,4,6‐trinitrobenzene.

Abstract

ChemInform Abstract Ethylation of the phosphazido compound (I) with the oxonium salt (II) regioselectively produces the ethyl derivative (III) with retention of the E-configuration in the PN3 fragment. (X-ray analysis of (III): monoclinic, space group P21/c, Z=4).

Constrained‐Geometry Bisphosphazides Derived from 1,8‐Diazidonaphthalene: Synthesis, Spectroscopic Characteristics, Structural Features, and Theoretical Investigations

“…Metal‐free open‐chain phosphazides in s ‐ trans conformation such as Ph 3 CNNNP(NMe 2 ) 3 (d(N γ ‐N β )=1.261(2), d(N β ‐N α )=1.376(2), d(N α ‐P)=1.620(2) Å),36 OH(CH 2 ) 3 NNNP(NMe 2 ) 3 (d(N γ ‐N β )=1.256(2), d(N β ‐N α )=1.375(2), d(N α ‐P)=1.615(1) Å),37 or ArNNNPPh 3 (Ar=2‐carboxyphenyl, d(N γ ‐N β )=1.279, d(N β ‐N α )=1.328, d(N α ‐P)=1.651 Å) show similar N α P bond lengths and reveal a shorter nitrogen–nitrogen distance between N γ and N β . A different situation is observed for ArNNNP(N(CH 2 ) 4 O) 3 (Ar=2,4,6‐trinitrophenyl; d(N γ ‐N β )=1.315, d(N β ‐N α )=1.298, d(N α ‐P)=1.637 Å)38 in which the strongly electron‐withdrawing aryl group stabilizes a negative partial charge at N γ 39…”

A P−H Functionalized Al/P Frustrated Lewis Pair: Substrate Activation and Selective Hydrogen Transfer

“…Compounds 3 and 4 did not decompose in benzene solution upon warming to 70 °C for several hours. The unique structure of 4 may be derived from triazene, R‐N=N‐NH 2 , or an unknown phosphanyltriazene, R 2 P‐N=N‐NH 2 , which is stabilized by coordination to the Al atom. Upon cooling to 210 K resonance signals of a second species were seen in the 1 H and 31 P NMR spectra with low, but steadily increasing intensity.…”

Synthesis and bio‐activity of novel iminophosphoranes

“…But in most cases such phosphazides lose nitrogen at room temperature or even at lower temperature to give the corresponding iminophosphoranes in practically quantitative yields. Stable and isolable phosphazides [7] were formed in the case of sterically hindered and the electron releasing substituents on phosphorus and electron decreasing groups on the -N of the azides [8,9]. Iminophosphosharanes play an important role in heterocyclic synthesis [10][11][12].…”