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

using model chemistry: CISD/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 CISD/3-21G*
 hartrees
Energy at 0K-265.823600
Energy at 298.15K-265.830870
HF Energy-265.355232
Nuclear repulsion energy177.119776
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 CISD/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' 3662 3422 25.89      
2 A' 3206 2996 18.44      
3 A' 3149 2942 3.94      
4 A' 3139 2934 16.98      
5 A' 1859 1737 181.75      
6 A' 1616 1510 8.83      
7 A' 1582 1478 20.36      
8 A' 1530 1430 11.11      
9 A' 1470 1374 47.00      
10 A' 1397 1306 2.75      
11 A' 1190 1112 178.51      
12 A' 1125 1051 144.20      
13 A' 1034 966 7.23      
14 A' 828 774 8.36      
15 A' 634 592 21.71      
16 A' 478 446 30.36      
17 A' 261 243 2.46      
18 A" 3213 3002 20.17      
19 A" 3180 2971 0.63      
20 A" 1616 1510 6.93      
21 A" 1366 1277 0.17      
22 A" 1198 1119 0.47      
23 A" 869 812 19.00      
24 A" 661 618 137.22      
25 A" 543 508 40.37      
26 A" 204 191 0.00      
27 A" 68 63 0.02      

Unscaled Zero Point Vibrational Energy (zpe) 20538.6 cm-1
Scaled (by 0.9344) Zero Point Vibrational Energy (zpe) 19191.3 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 CISD/3-21G*
ABC
0.33072 0.12710 0.09504

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.561 0.000
C2 -0.612 -0.821 0.000
C3 0.478 -1.907 0.000
O4 -0.984 1.527 0.000
O5 1.188 0.835 0.000
H6 -1.257 -0.900 0.877
H7 -1.257 -0.900 -0.877
H8 0.026 -2.900 0.000
H9 1.112 -1.807 -0.881
H10 1.112 -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
C11.51152.51391.37901.21912.11802.11803.46092.76092.76091.9412
C21.51151.53832.37772.44561.09221.09222.17432.17272.17273.2396
C32.51391.53833.73242.83222.18962.18961.09061.09021.09024.4492
O41.37902.37773.73242.27972.59572.59574.54084.03604.03600.9843
O51.21912.44562.83222.27973.12403.12403.91092.78632.78632.3625
H62.11801.09222.18962.59573.12401.75502.53283.08692.53693.5015
H72.11801.09222.18962.59573.12401.75502.53282.53693.08693.5015
H83.46092.17431.09064.54083.91092.53282.53281.77441.77445.3507
H92.76092.17271.09024.03602.78633.08692.53691.77441.76254.6309
H102.76092.17271.09024.03602.78632.53693.08691.77441.76254.6309
H111.94123.23964.44920.98432.36253.50153.50155.35074.63094.6309

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 111.025 C1 C2 H6 107.785
C1 C2 H7 107.785 C1 O4 H11 109.312
C2 C1 O4 110.606 C2 C1 O5 126.847
C2 C3 H8 110.435 C2 C3 H9 110.335
C2 C3 H10 110.335 C3 C2 H6 111.562
C3 C2 H7 111.562 O4 C1 O5 122.547
H6 C2 H7 106.915 H8 C3 H9 108.903
H8 C3 H10 108.903 H9 C3 H10 107.870
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability