Dihydrogen tetrametaphosphate, its derivatives, and preparation thereof
Dihydrogen metaphosphate can be synthesized via protonation, and can react with a dehydrating agent to afford tetrametaphosphate anhydride. A monohydrogen tetra-metaphosphate organic ester can be derived from the anhydride. A metal tetrametaphosphate complex can be prepared using a metal salt and a dihydrogen tetrametaphosphate.
1. A method of preparing a tetrametaphosphate anhydride comprising adding a reagent to a dihydrogen tetrametaphosphate wherein the reagent includes a N,N′-dicyclohexylcarbodiimide (DCC), a N,N′-diisopropylcarbodiimide (DIC), a 1-Ethyl-3-(3-dimethylaminopropyl)carbodiimide (EDCI), a carbonyldiimidazole (CDI), a phosphoryl chloride (POCl3), or a phosphorus trichloride (PCI3), or a mixture thereof.
2. The method of claim 1 , wherein the dihydrogen tetrametaphosphate includes [P 4 O 12 H 2 ] 2− .
3. The method of claim 1 , further comprising isolating the tetrametaphosphate anhydride by removing a byproduct.
4. The method of claim 3 , wherein the byproduct includes dicyclohexylurea.
5. A compound comprising a tetrametaphosphate anhydride and a cation.
6. The compound of claim 5 , where the cation includes a [PPN] + .
7. The compound of claim 5 , wherein the cation includes a [R 4 N] + , where R is nBu, sBu, iBu, nPr, iPr, Et, or Me.
8. The compound of claim 5 , wherein the cation includes a nitrogen-based cation.
9. The compound of claim 5 , wherein the cation includes a phosphorus-based cation.
10. The compound of claim 5 , wherein the cation includes an alkali or an alkali-earth metal cation.
11. The compound of claim 5 , wherein the cation includes an ionic liquid cation.