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All results from a given calculation for CH3CH2COOH (Propanoic Acid)

using model chemistry: MP2/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/3-21G
 hartrees
Energy at 0K-265.870301
Energy at 298.15K-265.877493
HF Energy-265.351619
Nuclear repulsion energy175.815786
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 MP2/3-21G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3500 3341 16.24      
2 A' 3178 3033 16.96      
3 A' 3112 2970 6.44      
4 A' 3104 2962 13.28      
5 A' 1742 1663 113.42      
6 A' 1600 1527 7.47      
7 A' 1565 1494 19.33      
8 A' 1504 1435 10.74      
9 A' 1430 1365 35.90      
10 A' 1358 1296 6.04      
11 A' 1151 1099 93.77      
12 A' 1081 1032 201.62      
13 A' 1014 968 18.99      
14 A' 802 766 6.88      
15 A' 612 584 14.11      
16 A' 465 444 30.16      
17 A' 254 242 2.05      
18 A" 3184 3039 19.30      
19 A" 3149 3006 1.12      
20 A" 1601 1528 6.41      
21 A" 1345 1284 0.04      
22 A" 1177 1123 0.05      
23 A" 854 815 13.00      
24 A" 654 624 128.15      
25 A" 535 511 32.11      
26 A" 201 192 0.00      
27 A" 63 60 0.03      

Unscaled Zero Point Vibrational Energy (zpe) 20116.9 cm-1
Scaled (by 0.9545) Zero Point Vibrational Energy (zpe) 19201.6 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 MP2/3-21G
ABC
0.32247 0.12622 0.09389

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.560 0.000
C2 -0.616 -0.827 0.000
C3 0.481 -1.911 0.000
O4 -1.002 1.533 0.000
O5 1.206 0.839 0.000
H6 -1.262 -0.909 0.881
H7 -1.262 -0.909 -0.881
H8 0.032 -2.908 0.000
H9 1.115 -1.807 -0.884
H10 1.115 -1.807 0.884
H11 -0.556 2.424 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9 H10 H11
C11.51772.51761.39671.23762.12812.12813.46892.76202.76201.9450
C21.51771.54252.39132.46861.09561.09562.18032.17742.17743.2514
C32.51761.54253.74992.84402.19502.19501.09391.09331.09334.4574
O41.39672.39133.74992.31432.60962.60964.56044.05224.05220.9964
O51.23762.46862.84402.31433.15023.15023.92722.79102.79102.3698
H62.12811.09562.19502.60963.15021.76222.53913.09432.54143.5195
H72.12811.09562.19502.60963.15021.76222.53912.54143.09433.5195
H83.46892.18031.09394.56043.92722.53912.53911.78061.78065.3649
H92.76202.17741.09334.05222.79103.09432.54141.78061.76834.6341
H102.76202.17741.09334.05222.79102.54143.09431.78061.76834.6341
H111.94503.25144.45740.99642.36983.51953.51955.36494.63414.6341

picture of Propanoic Acid state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 110.711 C1 C2 H6 107.956
C1 C2 H7 107.956 C1 O4 H11 107.562
C2 C1 O4 110.204 C2 C1 O5 126.974
C2 C3 H8 110.420 C2 C3 H9 110.226
C2 C3 H10 110.226 C3 C2 H6 111.489
C3 C2 H7 111.489 O4 C1 O5 122.822
H6 C2 H7 107.062 H8 C3 H9 108.990
H8 C3 H10 108.990 H9 C3 H10 107.935
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability