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Indium(III) acetate to Indium(III) chloride ?

Bill Welden  Follow

Dear Kevin Knebel thank you for this very interesting technical question. A two-step procedure should be possible to convert you indium(III) acetate into indium trichloride. First dissolve a certain amount of indium(III) acetate in a minimum of distilled water and add a concentrated aqueous solution of 3 equiv. of NaOH. This will precipitate white, somewhat gel-like In(OH)3. Isolate the precipitate by filtration and wash the hydroxide thoroughly with water. Then you can dissolve the indium(III) hydroxide in concentrated HCl solution and evaporate the resulting solution (filter if necessary) to dryness to get hydrated indium(III) trichloride.
Good luck with your work!

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David A. Smith  Follow

Dear Kevin,
My suggestion is that you get the indium chloride. It is not an expensive reagent and it is sure that in some university laboratory they have it and they can give you a little. Synthesis would be the last option (for me). Years ago, when the means were very scarce and some commercial reagents were not available, I synthesized several compounds for my doctoral dissertation and it was a real headache ... After the synthesis you have to wash, purify, and make sure that the compound you have obtained is what you want to obtain, so the amount of time you lose is enormous and does not deserve the effort ... I repeat, it is best to ask a university laboratory for it. They will surely give it to you.

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Charles McDevitt  Follow

Thank you all for your input, and advice.

Dinesh Kumar Madheswaran Thank you for the literature.

Francisco Manuel Marquez I do agree it is easer to obtain the chemical from the manufacture, however, my order I placed with fisher has been repeatedly delayed hopefully I will receive my shipment soon.

Thank you for the suggestion Frank T. Edelmann I will give this method a try.


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Becca Altic  Follow

Dear Kevin Knebel , a patent filed a method for preparing high-purity anhydrous indium trichloride, which is given that, Using 99.99-99.999% Indium metal and 36% hydrochloric acid as the material and using organic solvents including n-butyl alcohol and n-heptane as the dehydrator, that is, using more unstable complex to replace more stable compound, the stable hydrated indium trichloride is replaced with the more unstable complex of the indium trichloride organic solvent; adopting a manner of microwave heating and gradually heating up including three steps of distillation dehydration at normal pressure, distillation de-reagent at reduced pressure and sublimation and purification of the anhydrous indium trichloride; and finally obtaining the high purity anhydrous indium trichloride (InCl3), which is white with a purity of up to 99.99-99.999% and a production rate of 97%-98%.
A method for producing organometal chlorides directly from molten metal is yet another patent filed. The organometal chlorides are formed by contacting an organochloride directly with a metal melt. The preferred method includes the use of indium as the metal and methyl chloride as the organochloride. The direct contact of the methyl chloride with the indium metal results in the production of dimethyl indium chloride or methyl indium dichloride depending on the contacting time and efficiency of the process. The resulting products are suitable for use as a precursor gas for chemical vapour deposition processes. Additionally, activator compounds such as oxides or halides are optionally added to the metal melt to enhance the reaction rate.

Also, these papers perhaps help:
W. Klemm, "Messungen an Indiumhalogeniden. I", Z. Anorg. Allg. Chem., 152(1), 1926, 252-266.
W. Klemm, F. Dierks, "Beiträge zur Kenntnis der Verbindungen des Galliums und Indiums. IX. Die Dichten der festen Indiumhalogenide", Z. Anorg. Allg. Chem., 219(1), Aug. 1934, 42-44.
F. Ensslin, B. Ziemeck, L. de Sćhaepdryver, "Zur Chemie des Indiums. VI. Die Löslichkeit von Indium(III)‐chlorid, Indium(III)‐bromid und Indium(III)‐jodid im Wasser bei verschiedenen Temperaturen", Z. Anorg. Allg. Chem., 254(5‐6), Dez. 1947, 293-296.

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Craig Brown  Follow

Dear Kevin Knebel thank you for this very interesting technical question. A two-step procedure should be possible to convert you indium(III) acetate into indium trichloride. First dissolve a certain amount of indium(III) acetate in a minimum of distilled water and add a concentrated aqueous solution of 3 equiv. of NaOH. This will precipitate white, somewhat gel-like In(OH)3. Isolate the precipitate by filtration and wash the hydroxide thoroughly with water. Then you can dissolve the indium(III) hydroxide in concentrated HCl solution and evaporate the resulting solution (filter if necessary) to dryness to get hydrated indium(III) trichloride.
Good luck with your work!

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Chuck Britton  Follow

Dear Kevin,
My suggestion is that you get the indium chloride. It is not an expensive reagent and it is sure that in some university laboratory they have it and they can give you a little. Synthesis would be the last option (for me). Years ago, when the means were very scarce and some commercial reagents were not available, I synthesized several compounds for my doctoral dissertation and it was a real headache ... After the synthesis you have to wash, purify, and make sure that the compound you have obtained is what you want to obtain, so the amount of time you lose is enormous and does not deserve the effort ... I repeat, it is best to ask a university laboratory for it. They will surely give it to you.

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