Sandor, E.; Csordas, L.; On Polymorphism of $\ce{Na2S2O3}$. In crystalline form, the $\ce{S-S}$ bond length is close to single $\ce{S-S}$ bond which implies a strong negative charge on the terminal sulfur. What is the correct structure of sodium thiosulfate? In gas phase - probably all forms are present but I don't know the exact distribution. ' One possible (and more accurate) Lewis structure is therefore: (Note that the dashed lines do not represent bonds, but weakly coordinating interactions, but not necessarily all of them.). 'NaS2O3- was probably studied in a gas phase, but I haven't seen papers about it. The crystal structure of anhydrous sodium thiosulphate. It is a conjugate base of a thiosulfate(1-). Second, check the edit history thoroughly before making any accusations. However, if we allowed them as an extension, which has been proposed multiple times, then the arrow would need to point from the oxygen towards the central sulfur, as in those occurrences the more electronegative element would assume the higher electron density. How to generate valid BTC address to withdraw coins to. The sodium ions and the thiosulfate ions form ion pairs (or ion triples) and are attracted to each other via diffuse electrostatic interactions. By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy. Thirdly. Sodium ions may coordinate to one or more thiosulfate ions, and therein to more than one site of the thiosulfate ion. \end{array}. Were any IBM mainframes ever run multiuser? Mn 2+ aqueous solution is pink or colourless. Structure, properties, spectra, suppliers and links for: thiosulfate, thiosulphate, S2O3(2-). There are vacant acceptor orbitals at the sodium ions (Na7, Na8). Did Star Trek ever tackle slavery as a theme in one of its episodes? The molecular weight of this ion is 112.12 g/mol. chemistry.stackexchange.com/questions/24928/…, Crystal Structure of Sodium thiosulfate pentahydrate, Crystal Structure of sodium thiosulphate 2/3-hydrate, MAINTENANCE WARNING: Possible downtime early morning Dec 2/4/9 UTC (8:30PM…, “Question closed” notifications experiment results and graduation. Sodium Thiosulfate Structure. This is a common situation in salt crystals. How to solve this puzzle of Martin Gardner? Is this a correct rendering of some fourteenth-century Italian writing in modern orthography? \ce{Na} & 7 & 0.86 \\\hline If we assume this molecule to be an ion-pair and calculate it in the gas phase, then we can draw a couple of conclusions, how a more accurate representation in the Lewis framework would look like. In any of these cases, it would be wrong to draw any bonds between the (molecular) ions. These are electronic energies only, but they show that the sodium atoms are not discretely bound and may interchange positions quite freely. In the case of the crystalline form, none of the above. \ce{S} & 2 & -0.73 \\ By using our site, you acknowledge that you have read and understand our Cookie Policy, Privacy Policy, and our Terms of Service. Thiosulfate(2-) is a divalent inorganic anion obtained by removal of both protons from thiosulfuric acid.It has a role as a human metabolite. Sodium thiosulfate can be prepared by heating sulfur with sodium sulfite solution. To learn more, see our tips on writing great answers. In terms of the NBO analysis, we can back this up, as it indicates no lone pair at the central sulfur (S1), three lone pairs at the oxygen (O3, O4, O5) and the ligand sulfur (S2), and four single bonds. It can be noted that the shape of the thiosulfate ion is tetrahedral in the solid-state of sodium thiosulfate. I'll include a few links to publications at the end of the post. The negative charge on the anion is highly delocalised... the sodium isn't directly bonded to any oxygens or silicons, rather associated with the anion as a whole. This would only be possible if d orbitals of said sulfur are involved. Thiosulfate is a type of ion, specifically an oxyanion of sulfur. MathJax reference. What is the cost of health care in the US?