2017年10月1日 · How can you explain the pKa of the first protolysis of phosphoric acid without using resonance

2015年11月19日 · This is why we have to represent a molecule that shows delocalization with its resonance structures. It is not the case that one oxygen is double bonded while the rest of them are single bonded, in fact all the $\ce{P-O}$ bonds are identical in length, and each have the strength of $\frac{5}{4}$ of a $\ce{P-O}$ single bond.

2024年5月7日 · One of the central P-OH groups can be in resonance with a neighboring doubly bonded oxygen. This resonance form partially shifts the negative charge away from the OH group, making it slightly less "willing" to release a proton (H+). $\endgroup$ –

2017年1月2日 · Its double negative charge makes it a very weak acid, although its conjugate base, phosphate, can be represented by four resonance structures. The Henderson-Hasselbalch equation can be applied to tell us the proportions of dihydrogen phosphate and monohydrogen phosphate present in a buffered system between pH 4 and 10.

2022年7月20日 · In a phosphate diester, for example, the two non-bridging oxygens share a -1 charge, as illustrated by the two major resonance contributors below. The bonding order for the bridging \(P-O\) bonds in a phosphate diester group is about 1, and for the non-bridging \(P-O\) bonds about 1.5.

2012年4月22日 · Neat liquid phosphoric acid (H 3 PO 4) has the highest intrinsic proton conductivity of any known substance and is a useful model for understanding proton transport in other phosphate-based...

Synthesis, characterization and in vitro application of pH/temperature sensitive superabsorbent hydrogel of phosphated co-polymer of methacrylic acid and methyl methacrylate ester. Journal of Porous Materials 2016, 23 (6) , 1495-1505. https://doi.org/10.1007/s10934-016-0210-3

In a phosphate diester, for example, the two non-bridging oxygens share a -1 charge, as illustrated by the two major resonance contributors below. The bonding order for the bridging P-O bonds in a phosphate diester group is about 1, and for the non-bridging P-O bonds about 1.5.

2022年12月29日 · Parahydrogen-induced nuclear polarization offers a significant increase in the sensitivity of NMR spectroscopy to create new probes for medical diagnostics by magnetic resonance imaging. As precursors of the biocompatible hyperpolarized probes, unsaturated derivatives of phosphoric acid, propargyl and allyl phosphates, are proposed.

2024年2月15日 · This study employs phosphoric acid as a model to investigate dissociation, ionic charge generation, formation of hydrogen-bonded complexes, viscosity, and intramolecular kinetics of acid hydrations in water. The goal is to gain …