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All results from a given calculation for C3H4O2 (2-Propenoic acid)

using model chemistry: CBS-Q

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at CBS-Q
 hartrees
Energy at 0K-266.777063
Energy at 298.15K-266.771099
Nuclear repulsion energy164.433962
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at CBS-Q
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 4071 4071 110.04      
2 A' 3432 3432 4.49      
3 A' 3386 3386 2.74      
4 A' 3338 3338 7.06      
5 A' 2026 2026 554.77      
6 A' 1849 1849 10.14      
7 A' 1576 1576 47.08      
8 A' 1500 1500 78.11      
9 A' 1417 1417 3.28      
10 A' 1359 1359 224.40      
11 A' 1130 1130 57.75      
12 A' 909 909 11.78      
13 A' 641 641 55.26      
14 A' 577 577 8.32      
15 A' 304 304 1.49      
16 A" 1131 1131 24.81      
17 A" 1125 1125 34.18      
18 A" 927 927 74.72      
19 A" 661 661 127.41      
20 A" 529 529 17.68      
21 A" 125 125 0.09      

Unscaled Zero Point Vibrational Energy (zpe) 16004.7 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 16004.7 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at CBS-Q
See section I.F.4 to change rotational constant units
Geometric Data calculated at CBS-Q Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 1.314 0.362 0.000
H2 1.747 1.204 0.000
O3 -0.470 1.656 0.000
C4 0.000 0.568 0.000
C5 -0.804 -0.678 0.000
H6 -1.867 -0.511 0.000
C7 -0.281 -1.892 0.000
H8 0.784 -2.051 0.000
H9 -0.909 -2.767 0.000

Atom - Atom Distances (Å)
  O1 H2 O3 C4 C5 H6 C7 H8 H9
O10.94692.20431.33032.35983.29892.76092.47043.8387
H20.94692.26251.85913.17014.00013.70073.39464.7778
O32.20432.26251.18542.35782.57773.55253.91304.4448
C41.33031.85911.18541.48272.15612.47532.73333.4567
C52.35983.17012.35781.48271.07641.32142.09862.0917
H63.29894.00012.57772.15611.07642.10333.06582.4516
C72.76093.70073.55252.47531.32142.10331.07631.0778
H82.47043.39463.91302.73332.09863.06581.07631.8383
H93.83874.77784.44483.45672.09172.45161.07781.8383

picture of 2-Propenoic acid state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C4 O3 122.269 O1 C4 C5 113.931
H2 O1 C4 108.275 O3 C4 C5 123.800
C4 C5 H6 113.868 C4 C5 C7 123.850
C5 C7 H8 121.825 C5 C7 H9 121.012
H6 C5 C7 122.282 H8 C7 H9 117.163
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability