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: mPW1PW91/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at mPW1PW91/6-31G*
 hartrees
Energy at 0K-232.396409
Energy at 298.15K-232.404866
Nuclear repulsion energy175.651153
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 mPW1PW91/6-31G*
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' 3162 2999 22.58      
2 A' 3152 2989 49.71      
3 A' 3110 2950 5.22      
4 A' 3074 2915 17.47      
5 A' 2900 2750 114.68      
6 A' 1870 1774 185.92      
7 A' 1544 1464 17.32      
8 A' 1537 1458 8.97      
9 A' 1454 1379 2.25      
10 A' 1438 1364 3.71      
11 A' 1335 1266 0.99      
12 A' 1202 1140 0.02      
13 A' 1198 1136 8.87      
14 A' 943 894 19.63      
15 A' 862 817 23.35      
16 A' 551 522 6.29      
17 A' 356 337 7.12      
18 A' 331 314 0.22      
19 A' 234 222 0.86      
20 A" 3162 2998 15.17      
21 A" 3147 2985 3.03      
22 A" 3072 2913 22.72      
23 A" 1524 1445 1.93      
24 A" 1520 1441 1.25      
25 A" 1430 1356 4.50      
26 A" 1366 1296 0.80      
27 A" 1158 1098 0.36      
28 A" 1007 955 0.18      
29 A" 968 918 0.83      
30 A" 947 898 1.58      
31 A" 327 310 0.70      
32 A" 217 206 0.07      
33 A" 67 63 5.16      

Unscaled Zero Point Vibrational Energy (zpe) 25083.0 cm-1
Scaled (by 0.9483) Zero Point Vibrational Energy (zpe) 23786.2 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 mPW1PW91/6-31G*
ABC
0.25750 0.12438 0.09400

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 -0.224 0.601 2.170
H2 -0.224 0.601 -2.170
H3 -1.695 0.102 -1.318
H4 -1.695 0.102 1.318
H5 -1.178 1.791 1.269
H6 -1.178 1.791 -1.269
C7 -0.819 0.757 -1.265
C8 -0.819 0.757 1.265
H9 0.905 1.100 0.000
C10 0.000 0.484 0.000
C11 0.451 -0.957 0.000
H12 -0.385 -1.695 0.000
O13 1.599 -1.330 0.000

Atom - Atom Distances (Å)
  H1 H2 H3 H4 H5 H6 C7 C8 H9 C10 C11 H12 O13
H14.33913.81781.77181.77063.76133.48911.09372.49582.18432.75533.16363.4290
H24.33911.77183.81783.76131.77061.09373.48912.49582.18432.75533.16363.4290
H33.81781.77182.63563.13241.76711.09592.80513.08082.18072.73192.58493.8252
H41.77183.81782.63561.76713.13242.80511.09593.08082.18072.73192.58493.8252
H51.77063.76133.13241.76712.53792.76001.09402.53452.16923.43713.79354.3652
H63.76131.77061.76713.13242.53791.09402.76002.53452.16923.43713.79354.3652
C73.48911.09371.09592.80512.76001.09402.52992.16491.53132.48022.79353.4348
C81.09373.48912.80511.09591.09402.76002.52992.16491.53132.48022.79353.4348
H92.49582.49583.08083.08082.53452.53452.16492.16491.09462.10643.07842.5268
C102.18432.18432.18072.18072.16922.16921.53131.53131.09461.50982.21282.4174
C112.75532.75532.73192.73193.43713.43712.48022.48022.10641.50981.11551.2063
H123.16363.16362.58492.58493.79353.79352.79352.79353.07842.21281.11552.0170
O133.42903.42903.82523.82524.36524.36523.43483.43482.52682.41741.20632.0170

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 108.039 H1 C8 H5 108.063
H1 C8 C10 111.540 H2 C7 H3 108.039
H2 C7 H6 108.063 H2 C7 C10 111.540
H3 C7 H6 107.602 H3 C7 C10 111.124
H4 C8 H5 107.602 H4 C8 C10 111.124
H5 C8 C10 110.325 H6 C7 C10 110.325
C7 C10 C8 111.390 C7 C10 H9 109.946
C7 C10 C11 109.286 C8 C10 H9 109.946
C8 C10 C11 109.286 H9 C10 C11 106.874
C10 C11 H12 114.051 C10 C11 O13 125.383
H12 C11 O13 120.566
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.190      
2 H 0.190      
3 H 0.175      
4 H 0.175      
5 H 0.185      
6 H 0.185      
7 C -0.532      
8 C -0.532      
9 H 0.192      
10 C -0.218      
11 C 0.265      
12 H 0.118      
13 O -0.395      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -2.397 1.463 0.000 2.809
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -35.459 3.430 0.000
y 3.430 -32.481 0.000
z 0.000 0.000 -30.348
Traceless
 xyz
x -4.045 3.430 0.000
y 3.430 0.422 0.000
z 0.000 0.000 3.622
Polar
3z2-r27.245
x2-y2-2.978
xy3.430
xz0.000
yz0.000


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


<r2> (average value of r2) Å2
<r2> 134.231
(<r2>)1/2 11.586