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

using model chemistry: CID/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 CID/3-21G
 hartrees
Energy at 0K-265.819569
Energy at 298.15K-265.826860
HF Energy-265.355432
Nuclear repulsion energy177.239633
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 CID/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' 3675 3423 26.35      
2 A' 3210 2991 18.10      
3 A' 3153 2937 3.93      
4 A' 3144 2929 16.72      
5 A' 1872 1744 182.99      
6 A' 1617 1506 9.05      
7 A' 1583 1475 20.28      
8 A' 1531 1427 11.33      
9 A' 1474 1373 49.04      
10 A' 1400 1305 2.41      
11 A' 1193 1112 187.89      
12 A' 1128 1051 137.08      
13 A' 1036 965 6.82      
14 A' 832 775 8.61      
15 A' 637 593 22.10      
16 A' 479 446 30.12      
17 A' 261 243 2.45      
18 A" 3217 2997 19.82      
19 A" 3184 2966 0.68      
20 A" 1617 1507 7.00      
21 A" 1367 1274 0.17      
22 A" 1199 1117 0.48      
23 A" 870 811 19.03      
24 A" 660 614 135.95      
25 A" 544 507 42.69      
26 A" 205 191 0.00      
27 A" 69 64 0.02      

Unscaled Zero Point Vibrational Energy (zpe) 20578.6 cm-1
Scaled (by 0.9316) Zero Point Vibrational Energy (zpe) 19171.0 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 CID/3-21G
ABC
0.33150 0.12719 0.09515

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.561 0.000
C2 -0.611 -0.820 0.000
C3 0.477 -1.906 0.000
O4 -0.982 1.527 0.000
O5 1.186 0.834 0.000
H6 -1.257 -0.899 0.877
H7 -1.257 -0.899 -0.877
H8 0.025 -2.899 0.000
H9 1.111 -1.807 -0.881
H10 1.111 -1.807 0.881
H11 -0.565 2.418 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9 H10 H11
C11.51072.51341.37771.21742.11712.11713.46002.76072.76071.9407
C21.51071.53782.37662.44301.09211.09212.17362.17212.17213.2384
C32.51341.53783.73092.83062.18892.18891.09051.09001.09004.4481
O41.37772.37663.73092.27692.59472.59474.53904.03474.03470.9835
O51.21742.44302.83062.27693.12143.12143.90912.78542.78542.3615
H62.11711.09212.18892.59473.12141.75462.53193.08622.53633.5002
H72.11711.09212.18892.59473.12141.75462.53192.53633.08623.5002
H83.46002.17361.09054.53903.90912.53192.53191.77401.77405.3492
H92.76072.17211.09004.03472.78543.08622.53631.77401.76224.6302
H102.76072.17211.09004.03472.78542.53633.08621.77401.76224.6302
H111.94073.23844.44810.98352.36153.50023.50025.34924.63024.6302

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 111.065 C1 C2 H6 107.778
C1 C2 H7 107.778 C1 O4 H11 109.421
C2 C1 O4 110.651 C2 C1 O5 126.812
C2 C3 H8 110.432 C2 C3 H9 110.339
C2 C3 H10 110.339 C3 C2 H6 111.556
C3 C2 H7 111.556 O4 C1 O5 122.538
H6 C2 H7 106.896 H8 C3 H9 108.899
H8 C3 H10 108.899 H9 C3 H10 107.873
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability