return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: QCISD/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at QCISD/6-31G**
 hartrees
Energy at 0K-267.673941
Energy at 298.15K-267.681158
HF Energy-266.858227
Nuclear repulsion energy178.060548
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 QCISD/6-31G**
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' 3846 3621 53.20      
2 A' 3205 3017 23.89      
3 A' 3123 2940 5.44      
4 A' 3121 2938 24.99      
5 A' 1869 1759 235.26      
6 A' 1559 1468 8.96      
7 A' 1527 1437 8.43      
8 A' 1482 1396 12.85      
9 A' 1462 1377 47.69      
10 A' 1350 1271 4.12      
11 A' 1211 1140 240.41      
12 A' 1123 1057 55.48      
13 A' 1041 980 1.35      
14 A' 841 792 7.10      
15 A' 620 584 24.41      
16 A' 472 444 22.06      
17 A' 256 241 2.43      
18 A" 3213 3025 24.14      
19 A" 3163 2978 5.56      
20 A" 1553 1462 4.31      
21 A" 1321 1244 0.00      
22 A" 1147 1079 0.61      
23 A" 832 783 14.16      
24 A" 672 633 111.03      
25 A" 525 494 18.65      
26 A" 219 206 0.00      
27 A" 54 50 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 20402.2 cm-1
Scaled (by 0.9414) Zero Point Vibrational Energy (zpe) 19206.6 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 QCISD/6-31G**
ABC
0.33634 0.12742 0.09566

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.570 0.000
C2 -0.606 -0.814 0.000
C3 0.449 -1.913 0.000
O4 -0.961 1.531 0.000
O5 1.186 0.831 0.000
H6 -1.260 -0.884 0.872
H7 -1.260 -0.884 -0.872
H8 -0.027 -2.893 0.000
H9 1.087 -1.836 -0.879
H10 1.087 -1.836 0.879
H11 -0.489 2.377 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9 H10 H11
C11.51042.52311.35901.21442.11242.11243.46322.78302.78301.8720
C21.51041.52362.37132.43241.09261.09262.15862.16442.16443.1926
C32.52311.52363.72142.84152.17742.17741.09001.08901.08904.3912
O41.35902.37133.72142.25792.58502.58504.52164.03804.03800.9684
O51.21442.43242.84152.25793.11233.11233.91722.81072.81072.2792
H62.11241.09262.17742.58503.11231.74432.51353.07952.53283.4623
H72.11241.09262.17742.58503.11231.74432.51352.53283.07953.4623
H83.46322.15861.09004.52163.91722.51352.51351.76971.76975.2903
H92.78302.16441.08904.03802.81073.07952.53281.76971.75904.5835
H102.78302.16441.08904.03802.81072.53283.07951.76971.75904.5835
H111.87203.19264.39120.96842.27923.46233.46235.29034.58354.5835

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 112.533 C1 C2 H6 107.408
C1 C2 H7 107.408 C1 O4 H11 105.872
C2 C1 O4 111.362 C2 C1 O5 126.078
C2 C3 H8 110.258 C2 C3 H9 110.775
C2 C3 H10 110.775 C3 C2 H6 111.606
C3 C2 H7 111.606 O4 C1 O5 122.559
H6 C2 H7 105.927 H8 C3 H9 108.615
H8 C3 H10 108.615 H9 C3 H10 107.722
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability