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Helium Atom
CAS: 7440-59-7 | He
2D Structure
3D Structure
Loading 3D structure...
Basic Information
CAS Registry Number:
7440-59-7
Molecular Formula:
He
Molecular Weight:
4.003 g/mol
Names and Synonyms:
Helium Atom
Atomic helium
p-Helium
o-Helium
Helium-4
Helium
Identifiers:
SMILES:
[He]
InChI:
InChI=1S/He
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
| Category | Property | Value | Source |
|---|---|---|---|
| Physical Properties | molecular_mass | 4.00 g/mol | Legacy Database |
| density | 3.13 g/cm³ | Legacy Database | |
| wikipedia_url | https://en.wikipedia.org/wiki/Helium_atom | Legacy Database | |
| cas-boiling-point | -268.9 °C | Legacy Database | |
| cas-canonical-smile | [He] | Legacy Database | |
| cas-density | 3.13 g/cm3 | Legacy Database | |
| cas-inchi | InChI=1S/He | Legacy Database | |
| cas-inchi-key | InChIKey=SWQJXJOGLNCZEY-UHFFFAOYSA-N | Legacy Database | |
| cas-melting-point | -272.2 °C | Legacy Database | |
| cas-name | Helium | Legacy Database | |
| wikipedia-name | Helium atom | Legacy Database | |
| LogP | 0.0 | RDKit | |
| Molecular | Molecular Weight | 4.003 g/mol | RDKit |
| Exact | Exact Molecular Weight | 4.002603254 g/mol | RDKit |
| Heavy | Heavy Atom Count | 1 count | RDKit |
| Hydrogen | Hydrogen Bond Acceptors | 0 count | RDKit |
| Hydrogen Bond Donors | 0 count | RDKit | |
| Rotatable | Rotatable Bonds | 0 count | RDKit |
| Aromatic | Aromatic Ring Count | 0 count | RDKit |
| Topological | Topological Polar Surface Area | 0.0 Ų | RDKit |
| Molar | Molar Refractivity | 0.0 | RDKit |
