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

using model chemistry: MP2/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/6-31G**
 hartrees
Energy at 0K-267.636440
Energy at 298.15K-267.643655
HF Energy-266.857529
Nuclear repulsion energy178.127525
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 MP2/6-31G**
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' 3815 3572 60.60      
2 A' 3242 3036 17.65      
3 A' 3147 2947 16.46      
4 A' 3144 2944 8.74      
5 A' 1849 1732 204.22      
6 A' 1561 1462 8.90      
7 A' 1521 1424 10.73      
8 A' 1475 1381 7.45      
9 A' 1454 1362 58.73      
10 A' 1334 1250 8.26      
11 A' 1195 1119 216.72      
12 A' 1120 1049 82.08      
13 A' 1043 977 1.66      
14 A' 841 788 7.49      
15 A' 617 577 21.05      
16 A' 472 442 23.06      
17 A' 256 240 2.40      
18 A" 3250 3044 17.09      
19 A" 3194 2991 3.88      
20 A" 1555 1457 5.13      
21 A" 1320 1236 0.00      
22 A" 1143 1070 0.31      
23 A" 831 778 13.94      
24 A" 677 634 109.12      
25 A" 526 493 18.63      
26 A" 222 208 0.00      
27 A" 52 49 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 20426.9 cm-1
Scaled (by 0.9365) Zero Point Vibrational Energy (zpe) 19129.8 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 MP2/6-31G**
ABC
0.33504 0.12805 0.09589

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.567 0.000
C2 -0.606 -0.812 0.000
C3 0.448 -1.907 0.000
O4 -0.964 1.528 0.000
O5 1.190 0.828 0.000
H6 -1.260 -0.882 0.871
H7 -1.260 -0.882 -0.871
H8 -0.025 -2.888 0.000
H9 1.084 -1.828 -0.878
H10 1.084 -1.828 0.878
H11 -0.485 2.373 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9 H10 H11
C11.50652.51451.36141.21832.10882.10883.45482.77212.77211.8705
C21.50651.51992.36792.43221.09141.09142.15542.15902.15903.1880
C32.51451.51993.71452.83412.17402.17401.08831.08741.08744.3813
O41.36142.36793.71452.26492.58032.58034.51504.02924.02920.9711
O51.21832.43222.83412.26493.11233.11233.90912.79952.79952.2794
H62.10881.09142.17402.58033.11231.74182.51133.07422.52833.4582
H72.10881.09142.17402.58033.11231.74182.51132.52833.07423.4582
H83.45482.15541.08834.51503.90912.51132.51131.76731.76735.2813
H92.77212.15901.08744.02922.79953.07422.52831.76731.75614.5705
H102.77212.15901.08744.02922.79952.52833.07421.76731.75614.5705
H111.87053.18804.38130.97112.27943.45823.45825.28134.57054.5705

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 112.378 C1 C2 H6 107.452
C1 C2 H7 107.452 C1 O4 H11 105.405
C2 C1 O4 111.210 C2 C1 O5 126.084
C2 C3 H8 110.370 C2 C3 H9 110.707
C2 C3 H10 110.707 C3 C2 H6 111.673
C3 C2 H7 111.673 O4 C1 O5 122.706
H6 C2 H7 105.863 H8 C3 H9 108.642
H8 C3 H10 108.642 H9 C3 H10 107.692
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability