Salts containing different amino acids: four types of salts with the hexafluorosilicate anion

Salts containing different amino acids: four types of salts with the sulfate anion

“…A related salt, the hexa uorosilicate monohydrate (b-AlaH)(BetH)SiF 6 •H 2 O has been described [5] in space group P2 1 /n with Z = 12.…”

“…each one b-alaninium and l-prolinium cation and one sulfate anion. The hexa uorosilicate salt (b-AlaH)(L-ProH)SiF 6 [5] -contrary to (b-AlaH)(L-ProH)SO 4 (III) -is described with lower symmetry in the space group P2 1 . (iv) -x + 1, y + 1/2, -z + 1/2; (v) -x + 1, y + 1/2, -z + 1/2.…”

“…11). The hexa uorosilicate analog of (β-AlaH)(l-ProH•••l-Pro)SO 4 (VI) is the salt (β-AlaH)(l-ProH•••l-Pro)SiF 6 with the same symmetry [5]. Both compounds are isotypic, if one ignores the differences regarding the SO 4 and SiF 6 groups.…”

“…2)] 2 Y (A = amino acid, Y = anion). We further reported the synthesis and crystal structures of six compounds [5] containing amino acids glycine (Gly), sarcosine (Sar), dimethylglycine (DMG), betaine (Bet), β-alanine (β-Ala) and l-proline (l-Pro): (β-AlaH)(BetH)SiF 6 •H 2 O, (β-AlaH)(l-ProH)SiF 6 , (β-AlaH)( l-ProH•••l-Pro)SiF 6 , (BetH)(BetH•••Sar)SiF 6 •H 2 O, (GlyH•••DMG) 2 SiF 6 and (DMGH•••Sar) 2 SiF 6 . It seemed promising to check possibilities to synthesize similar salts with a sulfate anion.…”

“…Two more, A(1) + [A(2) + •••A(2)]Y 2− and A(1) + [A(1) + •••A(2)]Y 2− , are analogs of the triglycine sulfate type A + (A + •••A)Y 2− . The crystals (β-AlaH)(l-ProH•••l-Pro)SO 4 (VI) and (β-AlaH)(β-AlaH•••DMG)SO 4 (VII) belong to these categories in addition to (β-AlaH)(l-ProH•••l-Pro)SiF 6 and (BetH)(BetH•••Sar)SiF 6 •H 2 O obtained in[5]. A structural phase transition is revealed in case of (II) with changing the symmetry from P2 1 /n at 100K to Pnma at 200K.Declarations Funding declarationThis work was supported by the RA MES Committee of Science, in the frame of the research project № 18T-1D033.Con icts of interest/Competing interestsThe authors declare that they have no known competing nancial interests or personal relationships that could have appeared to in uence the work reported in this paper.Availability of data and materialFurther crystallographic data have been deposited with the Cambridge Crystallographic Data Centre and can be obtained free of charge via www.ccdc.cam.ac.uk/conts/retrieving.html (or from the Cambridge Crystallographic Data Centre, 12 Union Road, Cambridge CB2 1EZ, UK; fax: +44 1223 336033), citing the title of this paper and the CCDC nos.…”