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: HF/CEP-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 HF/CEP-31G
 hartrees
Energy at 0K-51.243960
Energy at 298.15K-51.251301
HF Energy-51.243960
Nuclear repulsion energy98.988930
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 HF/CEP-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' 4043 3644 90.09      
2 A' 3309 2983 66.41      
3 A' 3254 2933 14.64      
4 A' 3226 2908 50.08      
5 A' 1867 1683 336.50      
6 A' 1638 1476 12.36      
7 A' 1617 1457 16.88      
8 A' 1574 1418 0.71      
9 A' 1542 1390 73.48      
10 A' 1402 1264 25.63      
11 A' 1250 1127 239.31      
12 A' 1186 1069 118.59      
13 A' 1097 989 13.55      
14 A' 873 787 1.30      
15 A' 642 578 34.54      
16 A' 484 436 33.27      
17 A' 262 236 3.05      
18 A" 3326 2998 84.24      
19 A" 3299 2973 1.03      
20 A" 1630 1469 8.34      
21 A" 1399 1261 0.02      
22 A" 1234 1112 1.19      
23 A" 886 799 24.97      
24 A" 671 604 194.36      
25 A" 556 501 48.07      
26 A" 217 196 0.03      
27 A" 60 54 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 21270.2 cm-1
Scaled (by 0.9014) Zero Point Vibrational Energy (zpe) 19173.0 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 HF/CEP-31G
ABC
0.33390 0.12436 0.09372

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/CEP-31G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.567 0.000
C2 -0.606 -0.823 0.000
C3 0.456 -1.938 0.000
O4 -0.960 1.546 0.000
O5 1.192 0.850 0.000
H6 -1.255 -0.892 0.871
H7 -1.255 -0.892 -0.871
H8 -0.033 -2.912 0.000
H9 1.095 -1.872 -0.878
H10 1.095 -1.872 0.878
H11 -0.601 2.436 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9 H10 H11
C11.51692.54691.37041.22512.11302.11303.47932.81432.81431.9630
C21.51691.54032.39492.45641.08841.08842.16602.18302.18303.2592
C32.54691.54033.76062.88392.18682.18681.08921.08801.08804.5004
O41.37042.39493.76062.26142.60552.60554.55274.08324.08320.9601
O51.22512.45642.88392.26143.12793.12793.95622.86192.86192.3938
H62.11301.08842.18682.60553.12791.74182.51643.08932.54643.5020
H72.11301.08842.18682.60553.12791.74182.51642.54643.08933.5020
H83.47932.16601.08924.55273.95622.51642.51641.76751.76755.3780
H92.81432.18301.08804.08322.86193.08932.54641.76751.75644.7124
H102.81432.18301.08804.08322.86192.54643.08931.76751.75644.7124
H111.96303.25924.50040.96012.39383.50203.50205.37804.71244.7124

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 112.826 C1 C2 H6 107.250
C1 C2 H7 107.250 C1 O4 H11 113.603
C2 C1 O4 111.982 C2 C1 O5 126.907
C2 C3 H8 109.724 C2 C3 H9 111.151
C2 C3 H10 111.151 C3 C2 H6 111.434
C3 C2 H7 111.434 O4 C1 O5 121.111
H6 C2 H7 106.299 H8 C3 H9 108.544
H8 C3 H10 108.544 H9 C3 H10 107.639
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.019      
2 C -0.015      
3 C -0.333      
4 O -0.471      
5 O -0.241      
6 H 0.124      
7 H 0.124      
8 H 0.123      
9 H 0.121      
10 H 0.121      
11 H 0.428      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.857 -0.669 0.000 1.974
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -37.633 -0.748 0.000
y -0.748 -24.850 0.000
z 0.000 0.000 -29.613
Traceless
 xyz
x -10.401 -0.748 0.000
y -0.748 8.773 0.000
z 0.000 0.000 1.628
Polar
3z2-r23.257
x2-y2-12.783
xy-0.748
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.613 -0.064 0.000
y -0.064 5.592 0.000
z 0.000 0.000 3.836


<r2> (average value of r2) Å2
<r2> 105.208
(<r2>)1/2 10.257