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Scandium trifluoromethanesulfonate, commonly called scandium triflate, is a chemical compound with formula Sc(SO 3 CF 3) 3, a salt consisting of scandium cations Sc 3+ and triflate SO 3 CF − 3 anions. Scandium triflate is used as a reagent in organic chemistry as a Lewis acid. [1]
Lanthanide triflates are proposed for Friedel-Crafts acylations and alkylations, which are often carried out with AlCl 3 as the catalyst in an organic solvent. The nature of the Friedel-Craft reaction, especially the acylation, forces the AlCl 3 to irreversibly complex with any oxygen-containing group in the product, with the only way of decomplexing it being to destroy the AlCl 3 part with ...
A–Z Index of US Departments and Agencies, USA.gov, the US government's official web portal. Directory of agency contact information. CyberCemetery, online document archive of defunct US Federal Agencies, maintained by the University of North Texas Libraries in partnership with the Federal Depository Library Program of the GPO
Be(NO 3) 2: beryllium nitrate: 13597–99–4 Be(NO 3) 2 •4H 2 O: beryllium nitrate tetrahydrate: 13510–48–0 Be(NO 3) 2 •3H 2 O: beryllium nitrate trihydrate: 7787–55–5 BeO: beryllium oxide: 1304–56–9 Be(OH) 2: beryllium hydroxide: 13327–32–7 BeS: beryllium sulfide: 13598–22–6 BeSO 4: beryllium sulfate: 13510–49–1 ...
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Critics such as Rep. Ritchie Torres (D-NY) argue that eliminating entire agencies will require Congress. “Government 101: No federal agencies will be ‘deleted’ without an Act of Congress.
Hf(OTf) 4, was the most effective in comparison to other Lewis acids including BF 3 • OEt 2, Sc(OTf) 3, and Zr(OTf) 4. Similalrly, Hf(OTf) 4 shows excellent activity in Friedel-Crafts alkylation’s, and enabled the alkylation of benzene with benzylic and tertiary alkyl chlorides .
NBC News is publishing the names of over 1,800 unclaimed individuals sent to the University of North Texas Health Science Center to help families find answers.