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Cytosine
CAS: 71-30-7 | C4H5N3O
2D Structure
3D Structure
Loading 3D structure...
Basic Information
CAS Registry Number:
71-30-7
Molecular Formula:
C4H5N3O
Molecular Mass:
111.10 g/mol
Names and Synonyms:
Cytosine
2(1H)-Pyrimidinone, 6-amino-
2(1H)-Pyrimidinone, 4-amino-
Cytosine
6-Amino-2(1H)-pyrimidinone
4-Amino-2-hydroxypyrimidine
4-Amino-2-oxo-1,2-dihydropyrimidine
4-Amino-2(1H)-pyrimidinone
Cytosinimine
4-Aminouracil
NSC 27787
4-Amino-1H-pyrimidin-2-one
Cytosines
2-Hydroxy-4-pyrimidinamine
Identifiers:
SMILES:
N=c1ccnc(O)[nH]1
InChI:
InChI=1S/C4H5N3O/c5-3-1-2-6-4(8)7-3/h1-2H,(H3,5,6,7,8)
Key Properties
Melting Point
322.5 °C (decomp)
CAS Common Chemistry
Spectral Data
NMR, IR, and Mass spectral data
1H NMR
13C NMR
Predicting NMR spectra...
10 ppm
9
8
7
6
5
4
3
2
1
0 ppm
| Shift (ppm) | Multiplicity | Integration | Assignment |
|---|
200 ppm
180
160
140
120
100
80
60
40
20
0 ppm
| Shift (ppm) | DEPT | Assignment |
|---|
Note: These NMR spectra are predicted computationally and may differ from experimental data. Predictions are based on chemical environment analysis.
All Properties
Comprehensive physical and chemical properties
| Property | Value | Source |
|---|---|---|
| Molecular Mass | 111.10 g/mol | CAS Common Chemistry |
| 111.10399999999998 g/mol | RDKit | |
| 111.04326178 g/mol | RDKit | |
| Wikipedia Url | https://en.wikipedia.org/wiki/Cytosine | CAS Common Chemistry |
| Canonical SMILES | O=C1N=CC=C(N)N1 | CAS Common Chemistry |
| InChI | InChI=1S/C4H5N3O/c5-3-1-2-6-4(8)7-3/h1-2H,(H3,5,6,7,8) | CAS Common Chemistry |
| InChI Key | InChIKey=OPTASPLRGRRNAP-UHFFFAOYSA-N | CAS Common Chemistry |
| Melting Point | 322.5 °C (decomp) | CAS Common Chemistry |
| Name | Cytosine | CAS Common Chemistry |
| Heavy Atom Count | 8 | RDKit |
| Hydrogen Bond Acceptors | 3 | RDKit |
| Hydrogen Bond Donors | 3 | RDKit |
| Rotatable Bonds | 0 | RDKit |
| Aromatic Ring Count | 1 | RDKit |
| Topological Polar Surface Area | 72.75999999999999 Ų | RDKit |
| LogP | -0.40523000000000015 | RDKit |
| Molar Refractivity | 26.107199999999995 | RDKit |
