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-267.622269
Energy at 298.15K-267.629479
HF Energy-266.843095
Nuclear repulsion energy177.778209
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' 3708 3532 54.02      
2 A' 3159 3008 21.92      
3 A' 3083 2936 11.95      
4 A' 3079 2932 16.47      
5 A' 1869 1780 237.62      
6 A' 1550 1477 11.79      
7 A' 1524 1451 9.91      
8 A' 1479 1409 13.48      
9 A' 1460 1390 51.18      
10 A' 1353 1288 0.86      
11 A' 1212 1154 249.08      
12 A' 1122 1069 49.23      
13 A' 1041 991 1.80      
14 A' 841 801 7.41      
15 A' 621 592 23.78      
16 A' 473 450 22.89      
17 A' 257 245 2.50      
18 A" 3168 3017 21.61      
19 A" 3116 2968 4.85      
20 A" 1545 1471 5.83      
21 A" 1315 1252 0.02      
22 A" 1146 1091 0.55      
23 A" 834 794 16.88      
24 A" 676 644 114.11      
25 A" 527 502 20.01      
26 A" 218 207 0.00      
27 A" 57 54 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 20216.6 cm-1
Scaled (by 0.9523) Zero Point Vibrational Energy (zpe) 19252.3 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
0.33573 0.12710 0.09546

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 0.569 0.000
C2 -0.606 -0.814 0.000
C3 0.450 -1.915 0.000
O4 -0.961 1.532 0.000
O5 1.186 0.834 0.000
H6 -1.265 -0.886 0.876
H7 -1.265 -0.886 -0.876
H8 -0.029 -2.901 0.000
H9 1.092 -1.840 -0.884
H10 1.092 -1.840 0.884
H11 -0.486 2.386 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9 H10 H11
C11.51052.52481.36021.21472.11782.11783.47042.78892.78891.8801
C21.51051.52532.37282.43411.09861.09862.16472.17152.17153.2023
C32.52481.52533.72452.84522.18372.18371.09631.09501.09504.4013
O41.36022.37283.72452.25762.58912.58914.52954.04534.04530.9777
O51.21472.43412.84522.25763.11923.11923.92712.81722.81722.2808
H62.11781.09862.18372.58913.11921.75172.52093.09242.54293.4753
H72.11781.09862.18372.58913.11921.75172.52092.54293.09243.4753
H83.47042.16471.09634.52953.92712.52092.52091.77891.77895.3062
H92.78892.17151.09504.04532.81723.09242.54291.77891.76794.5962
H102.78892.17151.09504.04532.81722.54293.09241.77891.76794.5962
H111.88013.20234.40130.97772.28083.47533.47535.30624.59624.5962

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 112.543 C1 C2 H6 107.475
C1 C2 H7 107.475 C1 O4 H11 105.905
C2 C1 O4 111.383 C2 C1 O5 126.206
C2 C3 H8 110.255 C2 C3 H9 110.869
C2 C3 H10 110.869 C3 C2 H6 111.625
C3 C2 H7 111.625 O4 C1 O5 122.411
H6 C2 H7 105.735 H8 C3 H9 108.549
H8 C3 H10 108.549 H9 C3 H10 107.660
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability