# Group 17 Compounds

**URL:** https://chemdotes.discourse.group/c/group-17-compounds/11.md

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## [About the Group 17 Compounds category](https://chemdotes.discourse.group/t/about-the-group-17-compounds-category/16)

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**Author:** [@bmpuerta](https://chemdotes.discourse.group/u/bmpuerta)\
**Replies:** 0

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## [Hydrogen bromide gas (10035-10-6)](https://chemdotes.discourse.group/t/hydrogen-bromide-gas-10035-10-6/39)

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**Author:** [@bmpuerta](https://chemdotes.discourse.group/u/bmpuerta)\
**Replies:** 0\
**Last updated:** [March 8, 2024, 4:45am UTC](https://chemdotes.discourse.group/t/hydrogen-bromide-gas-10035-10-6/39 "2024-03-08T04:45:18Z")

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Although there are several ways of making hydrogen bromide in the literature, I have successfully used the method below when I needed the reagent for anti-Markovnikov hydrobromination of alkenes. It has turned out to be …

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## [Selectfluor (140681-55-6)](https://chemdotes.discourse.group/t/selectfluor-140681-55-6/34)

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**Author:** [@bmpuerta](https://chemdotes.discourse.group/u/bmpuerta)\
**Replies:** 0\
**Last updated:** [March 1, 2024, 3:17am UTC](https://chemdotes.discourse.group/t/selectfluor-140681-55-6/34 "2024-03-01T03:17:54Z")

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\[1-chloromethyl-4-fluoro-1,4-diazoniabicyclo-\[2.2.2\]octane bis(tetrafluoroborate), trademarked Selectfluor, is a convenient fluoride-atom source useful for the electrophilic fluorination of organic compounds. It is an ai…

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## [Anhydrous 4M HCl in ether (7647-01-0)](https://chemdotes.discourse.group/t/anhydrous-4m-hcl-in-ether-7647-01-0/30)

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**Author:** [@bmpuerta](https://chemdotes.discourse.group/u/bmpuerta)\
**Replies:** 0\
**Last updated:** [February 23, 2024, 3:30am UTC](https://chemdotes.discourse.group/t/anhydrous-4m-hcl-in-ether-7647-01-0/30 "2024-02-23T03:30:37Z")

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Take known volume of dry ether and an HCl cylinder. Bubble gaseous HCl through ice-cold ether at a rate where almost no gas can exit the liquid (indicated by bubbler). After about 20-30 min, a concentration of 3-5M shoul…