Vibrational levels (cm-1)
Mode Number |
Symmetry |
Frequency |
Intensity |
Comment |
Description |
Fundamental(cm-1) |
Harmonic(cm-1) |
Reference |
(km mol-1) |
unc. |
Reference |
1 |
A1' |
1065 |
|
Shim |
|
|
|
|
SO3 s-stretch |
2 |
A2" |
498 |
|
Shim |
|
|
|
|
OPLA |
3 |
E' |
1391 |
|
Shim |
|
|
|
|
SO3 d-stretch |
4 |
E' |
530 |
|
Shim |
|
|
|
|
SO3 d-bend |
vibrational zero-point energy: 2702.5 cm
-1 (from fundamental vibrations)
Calculated vibrational frequencies for
SO
3+ (Sulfur trioxide cation).
Geometric Data
Point Group D3h
Internal coordinates
distances (r) in Å, angles (a) in degrees, dihedrals (d) in degrees
Cartesians
Atom |
x (Å) |
y (Å) |
z (Å) |
S1 |
0.0000 |
0.0000 |
0.0000 |
O2 |
0.0000 |
1.4175 |
0.0000 |
O3 |
1.2276 |
-0.7088 |
0.0000 |
O4 |
-1.2276 |
-0.7088 |
0.0000 |
Atom - Atom Distances
Distances in Å
|
S1 |
O2 |
O3 |
O4 |
S1 |
|
1.4175 | 1.4175 | 1.4175 |
O2 |
1.4175 |
|
2.4552 | 2.4552 |
O3 |
1.4175 | 2.4552 |
|
2.4552 |
O4 |
1.4175 | 2.4552 | 2.4552 |
|
Calculated geometries
for SO
3+ (Sulfur trioxide cation).
Experimental Bond Angles (degrees) from cartesians
atom1 |
atom2 |
atom3 |
angle |
|
atom1 |
atom2 |
atom3 |
angle |
O2 |
S1 |
O3 |
120.000 |
|
O2 |
S1 |
O4 |
120.000 |
O3 |
S1 |
O4 |
120.000 |
Bond descriptions
Examples: C-C single bond, C=C, double bond, C#C triple bond, C:C aromatic bond
Connectivity
Atom 1 |
Atom 2 |
S1 |
O2 |
S1 |
O3 |
S1 |
O4 |
Dipole, Quadrupole and Polarizability
Electric dipole moment
State |
Config |
State description |
Conf description |
Exp. min. |
Dipole (Debye) |
Reference |
comment |
Point Group |
Components |
x |
y |
z |
total |
dipole |
quadrupole |
1 |
1 |
1A1' |
D3h |
True |
0.000 |
0.000 |
0.000 |
0.000 |
NSRDS-NBS10 |
|
D3h |
0 |
1 |
Experimental dipole measurement abbreviations: MW microwave; DT Dielectric with Temperature variation; DR Indirect (usually an upper limit); MB Molecular beam
Calculated electric dipole moments for
SO
3+ (Sulfur trioxide cation).
Electric quadrupole moment
State |
Config |
State description |
Conf description |
Exp. min. |
Quadrupole (D Å) |
Reference |
comment |
Point Group |
Components |
xx |
yy |
zz |
dipole |
quadrupole |
1 |
1 |
1A1' |
D3h |
True |
|
|
|
|
|
D3h |
0 |
1 |
Calculated electric quadrupole moments for
SO
3+ (Sulfur trioxide cation).
Electric dipole polarizability (Å3)
Calculated electric dipole polarizability for
SO
3+ (Sulfur trioxide cation).