Species with data from:

Schiedt, J.; Weinkauf, R.; Neumark, D.M.; Schlag, E.W., Anion spectroscopy of uracil, thymine and the amino-oxo and amino-hydroxy tautomers of cytosine and their water clusters, Chem. Phys., 1998, 239, 1-3, 511-524, https://doi.org/10.1016/S0301-0104(98)00361-9 .

20 matching species were found.

For each matching species the following will be displayed:

• Chemical name
• Chemical formula
• Structure image (if available)

Click on the name to see more data.

1. Uracil (C₄H₄N₂O₂)
   
2. Thymine (C₅H₆N₂O₂)
   
3. Cytosine (C₄H₅N₃O)
   
4. (H2O)3..uracil radical anion (C₄H₁₀N₂O₅^-)
5. (H2O)4..uracil radical anion (C₄H₁₂N₂O₆^-)
6. (H2O)5..uracil radical anion (C₄H₁₄N₂O₇^-)
7. (H2O)2..uracil radical anion (C₄H₈N₂O₄^-)
8. H2O..uracil radical anion (C₄H₆N₂O₃^-)
9. Cytosine anion (C₄H₅N₃O^-)
10. 2,4(1H,3H)-Pyrimidinedione anion (C₄H₄N₂O₂^-)
    
11. (H2O)3..cytosine radical anion (C₄H₁₁N₃O₄^-)
12. (H2O)4..cytosine radical anion (C₄H₁₃N₃O₅^-)
13. (H2O)5..cytosine radical anion (C₄H₁₅N₃O₆^-)
14. (H2O)2..cytosine radical anion (C₄H₉N₃O₃^-)
15. (H2O)2..thymine radical anion (C₅H₁₀N₂O₄^-)
16. (H2O)3..thymine radical anion (C₅H₁₂N₂O₅^-)
17. (H2O)4..thymine radical anion (C₅H₁₄N₂O₆^-)
18. (H2O)5..thymine radical anion (C₅H₁₆N₂O₇^-)
19. H2O..cytosine radical anion (C₄H₇N₃O₂^-)
20. H2O..thymine radical anion (C₅H₈N₂O₃^-)

© 2026 by the U.S. Secretary of Commerce on behalf of the United States of America. All rights reserved.

Copyright for NIST Standard Reference Data is governed by the Standard Reference Data Act.