Incidental Polymorphism, Non-Isomorphic and Isomorphic Substitution in Calcium-Valine Coordination Polymers
Five coordination polymers with the stoichiometry CaX2(valine)2(H2O)2 (X = Cl, Br) were obtained from the corresponding calcium halides and either racemic and enantiopure valine. In all cases the zwitterionic amino acid is exclusively O coordinated and the halides act as counteranions for the result...
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| Format: | Article |
| Language: | English |
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MDPI AG
2015-05-01
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| Series: | Crystals |
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| Online Access: | http://www.mdpi.com/2073-4352/5/2/261 |
| _version_ | 1818475061672148992 |
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| author | Kevin Lamberts Ulli Englert |
| author_facet | Kevin Lamberts Ulli Englert |
| author_sort | Kevin Lamberts |
| collection | DOAJ |
| description | Five coordination polymers with the stoichiometry CaX2(valine)2(H2O)2 (X = Cl, Br) were obtained from the corresponding calcium halides and either racemic and enantiopure valine. In all cases the zwitterionic amino acid is exclusively O coordinated and the halides act as counteranions for the resulting one-dimensional cationic chains. The enantiopure chloride shows dimorphism; both forms differ in connectivity from the bromide. In contrast to this structural variability for L-valine, the derivatives of the racemic amino acid are isomorphous. |
| first_indexed | 2024-04-14T04:44:38Z |
| format | Article |
| id | doaj.art-8e3b883a80824f9ab213568114b23595 |
| institution | Directory Open Access Journal |
| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-04-14T04:44:38Z |
| publishDate | 2015-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Crystals |
| spelling | doaj.art-8e3b883a80824f9ab213568114b235952022-12-22T02:11:29ZengMDPI AGCrystals2073-43522015-05-015226127210.3390/cryst5020261cryst5020261Incidental Polymorphism, Non-Isomorphic and Isomorphic Substitution in Calcium-Valine Coordination PolymersKevin Lamberts0Ulli Englert1Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, GermanyInstitute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, GermanyFive coordination polymers with the stoichiometry CaX2(valine)2(H2O)2 (X = Cl, Br) were obtained from the corresponding calcium halides and either racemic and enantiopure valine. In all cases the zwitterionic amino acid is exclusively O coordinated and the halides act as counteranions for the resulting one-dimensional cationic chains. The enantiopure chloride shows dimorphism; both forms differ in connectivity from the bromide. In contrast to this structural variability for L-valine, the derivatives of the racemic amino acid are isomorphous.http://www.mdpi.com/2073-4352/5/2/261coordination polymerspolymorphismisomorphismamino acidzwitterionic formvaline |
| spellingShingle | Kevin Lamberts Ulli Englert Incidental Polymorphism, Non-Isomorphic and Isomorphic Substitution in Calcium-Valine Coordination Polymers Crystals coordination polymers polymorphism isomorphism amino acid zwitterionic form valine |
| title | Incidental Polymorphism, Non-Isomorphic and Isomorphic Substitution in Calcium-Valine Coordination Polymers |
| title_full | Incidental Polymorphism, Non-Isomorphic and Isomorphic Substitution in Calcium-Valine Coordination Polymers |
| title_fullStr | Incidental Polymorphism, Non-Isomorphic and Isomorphic Substitution in Calcium-Valine Coordination Polymers |
| title_full_unstemmed | Incidental Polymorphism, Non-Isomorphic and Isomorphic Substitution in Calcium-Valine Coordination Polymers |
| title_short | Incidental Polymorphism, Non-Isomorphic and Isomorphic Substitution in Calcium-Valine Coordination Polymers |
| title_sort | incidental polymorphism non isomorphic and isomorphic substitution in calcium valine coordination polymers |
| topic | coordination polymers polymorphism isomorphism amino acid zwitterionic form valine |
| url | http://www.mdpi.com/2073-4352/5/2/261 |
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