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 CHOCH(CH3)CH3 (Propanal, 2-methyl-)

using model chemistry: HF/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 HF/6-31G
 hartrees
Energy at 0K-230.880873
Energy at 298.15K-230.889632
Nuclear repulsion energy175.717416
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/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' 3273 2955 48.92      
2 A' 3265 2948 69.54      
3 A' 3229 2916 1.08      
4 A' 3190 2881 35.71      
5 A' 3172 2864 55.09      
6 A' 1911 1726 184.22      
7 A' 1666 1504 19.90      
8 A' 1660 1499 6.30      
9 A' 1588 1434 2.53      
10 A' 1548 1398 9.85      
11 A' 1472 1329 3.81      
12 A' 1317 1189 2.36      
13 A' 1309 1182 5.09      
14 A' 1008 910 16.74      
15 A' 914 826 19.23      
16 A' 586 529 10.78      
17 A' 386 348 12.23      
18 A' 364 329 0.62      
19 A' 249 225 0.93      
20 A" 3270 2952 15.88      
21 A" 3254 2938 10.35      
22 A" 3185 2876 30.87      
23 A" 1649 1489 3.26      
24 A" 1646 1486 1.30      
25 A" 1568 1415 6.18      
26 A" 1485 1341 0.51      
27 A" 1250 1129 1.76      
28 A" 1067 963 0.64      
29 A" 1066 963 0.20      
30 A" 1034 933 1.52      
31 A" 362 327 1.41      
32 A" 225 203 0.03      
33 A" 62 56 11.64      

Unscaled Zero Point Vibrational Energy (zpe) 26614.5 cm-1
Scaled (by 0.9029) Zero Point Vibrational Energy (zpe) 24030.2 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/6-31G
ABC
0.25665 0.12432 0.09374

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 -0.232 0.588 2.165
H2 -0.232 0.588 -2.165
H3 -1.705 0.144 -1.317
H4 -1.705 0.144 1.317
H5 -1.136 1.800 1.279
H6 -1.136 1.800 -1.279
C7 -0.817 0.765 -1.270
C8 -0.817 0.765 1.270
H9 0.898 1.079 0.000
C10 0.000 0.472 0.000
C11 0.439 -0.966 0.000
H12 -0.361 -1.704 0.000
O13 1.597 -1.332 0.000

Atom - Atom Distances (Å)
  H1 H2 H3 H4 H5 H6 C7 C8 H9 C10 C11 H12 O13
H14.33053.80731.75721.75303.76113.48921.08372.49092.18072.74853.15603.4236
H24.33051.75723.80733.76111.75301.08373.48922.49092.18072.74853.15603.4236
H33.80731.75722.63433.13151.75221.08562.80543.06342.17962.75062.63773.8493
H41.75723.80732.63431.75223.13152.80541.08563.06342.17962.75062.63773.8493
H51.75303.76113.13151.75222.55702.76931.08332.50832.16593.43063.81034.3493
H63.76111.75301.75223.13152.55701.08332.76932.50832.16593.43063.81034.3493
C73.48921.08371.08562.80542.76931.08332.54022.15631.53832.48752.81423.4405
C81.08373.48922.80541.08561.08332.76932.54022.15631.53832.48752.81423.4405
H92.49092.49093.06343.06342.50832.50832.15632.15631.08362.09523.05422.5102
C102.18072.18072.17962.17962.16592.16591.53831.53831.08361.50312.20562.4090
C112.74852.74852.75062.75063.43063.43062.48752.48752.09521.50311.08881.2139
H123.15603.15602.63772.63773.81033.81032.81422.81423.05422.20561.08881.9926
O133.42363.42363.84933.84934.34934.34933.44053.44052.51022.40901.21391.9926

picture of Propanal, 2-methyl- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H1 C8 H4 108.200 H1 C8 H5 107.987
H1 C8 C10 111.372 H2 C7 H3 108.200
H2 C7 H6 107.987 H2 C7 C10 111.372
H3 C7 H6 107.775 H3 C7 C10 111.165
H4 C8 H5 107.775 H4 C8 C10 111.165
H5 C8 C10 110.209 H6 C7 C10 110.209
C7 C10 C8 111.312 C7 C10 H9 109.437
C7 C10 C11 109.742 C8 C10 H9 109.437
C8 C10 C11 109.742 H9 C10 C11 107.074
C10 C11 H12 115.704 C10 C11 O13 124.560
H12 C11 O13 119.736
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.174 0.062    
2 H 0.174 0.062    
3 H 0.156 0.052    
4 H 0.156 0.052    
5 H 0.172 0.081    
6 H 0.172 0.081    
7 C -0.454 -0.276    
8 C -0.454 -0.276    
9 H 0.206 -0.019    
10 C -0.298 0.236    
11 C 0.356 0.584    
12 H 0.149 -0.035    
13 O -0.507 -0.605    


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -3.127 1.654 0.000 3.537
CHELPG -3.134 1.671 0.000 3.552
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -38.097 4.734 0.000
y 4.734 -33.601 0.000
z 0.000 0.000 -31.154
Traceless
 xyz
x -5.719 4.734 0.000
y 4.734 1.024 0.000
z 0.000 0.000 4.695
Polar
3z2-r29.390
x2-y2-4.495
xy4.734
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.896 -0.609 0.000
y -0.609 6.083 0.000
z 0.000 0.000 5.618


<r2> (average value of r2) Å2
<r2> 135.328
(<r2>)1/2 11.633