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 |
2971 |
|
VEEL5 |
|
|
|
|
CH2 s-stretch |
2 |
A1 |
1456 |
|
VEEL5 |
|
|
|
|
CH2 sciss |
3 |
A1 |
1059 |
|
VEEL5 |
|
|
|
|
CS stretch |
4 |
B1 |
990 |
|
VEEL5 |
|
|
|
|
OPLA |
5 |
B2 |
3025 |
|
VEEL5 |
|
|
|
|
CH2 a-stretch |
6 |
B2 |
991 |
|
VEEL5 |
|
|
|
|
CH2 rock |
vibrational zero-point energy: 5245.8 cm
-1 (from fundamental vibrations)
Calculated vibrational frequencies for
H
2CS
+ (thioformaldehyde cation).
Geometric Data
Point Group C2v
Internal coordinates
distances (r) in Å, angles (a) in degrees, dihedrals (d) in degrees
Description |
Value |
unc. |
Connectivity |
Reference |
Comment |
Atom 1 |
Atom 2 |
Atom 3 |
Atom 4 |
rCS |
1.611 |
|
1 |
2 |
|
|
1998Kuc |
rs values |
rCH |
1.087 |
|
2 |
3 |
|
|
1998Kuc |
|
aHCH |
116.52 |
|
3 |
2 |
4 |
|
1998Kuc |
|
aHCS |
121.74 |
|
1 |
2 |
3 |
|
1998Kuc |
by symmetry |
Cartesians
Atom |
x (Å) |
y (Å) |
z (Å) |
S1 |
0.0000 |
0.0000 |
0.5846 |
C2 |
0.0000 |
0.0000 |
-1.0262 |
H3 |
0.0000 |
0.9244 |
-1.5980 |
H4 |
0.0000 |
-0.9244 |
-1.5980 |
Atom - Atom Distances
Distances in Å
|
S1 |
C2 |
H3 |
H4 |
S1 |
|
1.6108 | 2.3702 | 2.3702 |
C2 |
1.6108 |
|
1.0869 | 1.0869 |
H3 |
2.3702 | 1.0869 |
|
1.8487 |
H4 |
2.3702 | 1.0869 | 1.8487 |
|
Calculated geometries
for H
2CS
+ (thioformaldehyde cation).
Experimental Bond Angles (degrees) from cartesians
atom1 |
atom2 |
atom3 |
angle |
|
atom1 |
atom2 |
atom3 |
angle |
S1 |
C2 |
H3 |
121.740 |
|
S1 |
C2 |
H4 |
121.740 |
H3 |
C2 |
H4 |
116.520 |
Bond descriptions
Examples: C-C single bond, C=C, double bond, C#C triple bond, C:C aromatic bond
Bond Type |
Count |
H-C |
2 |
C=S |
1 |
Connectivity
Atom 1 |
Atom 2 |
S1 |
C2 |
C2 |
H3 |
C2 |
H4 |
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 |
C2v |
True |
|
|
-1.647 |
1.647 |
1974Hel/Hel(II/6) |
± 0.0014 |
C2v |
1 |
2 |
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
H
2CS
+ (thioformaldehyde 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 |
C2v |
True |
|
|
|
|
|
C2v |
1 |
2 |
Calculated electric quadrupole moments for
H
2CS
+ (thioformaldehyde cation).