What do you mean by phosphazene?
Phosphazenes are a class of chemical compounds in which a phosphorus atom is covalently linked to a nitrogen atom by a double bond and to three other atoms or radicals by single bonds. Phosphazenes are also known as iminophosphoranes and phosphine imides.
What is phosphazene polymer backbone?
The phosphazene polymers constitute a family of greatly diverse performance materials. These polymers possess a ‘backbone’ of alternating nitrogen and phosphorous atoms. To a basic ‘backbone’ polymer, a variety of substituents can be added that control the physical properties of the final product.
What are Cyclophosphazenes?
Cyclophosphazenes and cyclocarbophosphazenes are. inorganic heterocyclic rings, the former containing. alternate phosphorus and nitrogen atoms in their skeletal. frame-work while the latter contain an additional. heteroatom, viz.
How is phosphazene prepared?
The poly(dichlorophosphazene) (PZ) was obtained by melt ring-opening polymerization of hexachlorocyclotriphosphazene (HCCP) under vacuum at 250°C for 3 h. After this time, the polymer was dissolved at room temperature in anhydrous THF, and it was separated by precipitation into n-heptane.
What is phosphazene explain the nature of bonds in Triphosphazene?
The bonds between the phosphorus and nitrogen in phosphazenes are best described as having a significant ionic component with each of the N atoms having a negative charge and each of the phosphorus atoms having a positive charge. apsiganocj and 1 more users found this answer helpful. Thanks 0.
Why Phosphazene is called inorganic rubber?
One particular compound, poly(dichlorophosphazene), came to be known as “inorganic rubber” because of the similarity of many of its mechanical properties to those of natural rubber.
What is NPCl2?
Infobox references. Hexachlorophosphazene is an inorganic compound with the formula (NPCl2)3. The molecule has a cyclic, unsaturated backbone consisting of alternating phosphorus and nitrogen centers, and can be viewed as a trimer of the hypothetical compound N≡PCl2.
What is oxidation state of nitrogen in phosphazene?
The phosphazene compounds described here in this section are considerably less sensi- tive to oxygen compared with trivalent organophosphorus compounds, because the phos- phorus atom in phosphazenes is in its maximum (+5) oxidation state.
What is the bonding the nation of Triphosphazene?
The triphosphazene molecule contains a total of 9 bond(s) There are 4 non-H bond(s), 1 multiple bond(s), 1 rotatable bond(s) and 1 double bond(s). The 2D chemical structure image of triphosphazene is also called skeletal formula, which is the standard notation for organic molecules.
Which is the best phosphazene reagent for organic synthesis?
By now phosphazene bases are established reagents in organic synthesis. Perhaps the best known phosphazene bases are BEMP with an acetonitrile pKa of the conjugate acid of 27.6 and the phosphorimidic triamide t-Bu-P4 (pK BH+ = 42.7) also known as Schwesinger base after one of its inventors.
Which is the highest PK a of phosphazene?
The pK a ‘s of [tert-Bu (H)N=P (N=P (NR 2) 3) 3] + (R = Me, pyrrolide are 42.7 and 44, respectively. These are the highest pK a measured for the conjugate acid of charge-neutral molecular base. Phosphazene bases are established reagents in organic synthesis.
Which is the formula for a phosphazene compound?
Phosphazenes refer to classes of organophosphorus compounds featuring phosphorus (V) with a double bond between P and N. One class of phosphazenes have the formula RN=P (NR 2) 3. These phosphazenes are also known as iminophosphoranes and phosphine imides.
How are phosphazene bases related to proazaphosphatrane bases?
Related to phosphazene bases are the proazaphosphatrane bases, which have a saturated P (NR) 3 structure and protonate at phosphorus. Though the simplest phosphazene superbase, P1-Me, was first synthesized in 1975, chemists assumed that the compounds were highly unstable, like their alkyl-substituted derivatives.
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