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: CID/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 CID/6-31G*
 hartrees
Energy at 0K-231.602427
Energy at 298.15K-231.611057
HF Energy-230.985227
Nuclear repulsion energy176.123196
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 CID/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' 3246 2998 30.67      
2 A' 3238 2991 51.02      
3 A' 3197 2953 3.57      
4 A' 3160 2919 16.27      
5 A' 3044 2811 90.75      
6 A' 1944 1795 176.49      
7 A' 1605 1483 16.68      
8 A' 1600 1478 6.24      
9 A' 1521 1405 2.67      
10 A' 1504 1389 4.62      
11 A' 1403 1296 1.28      
12 A' 1260 1164 0.01      
13 A' 1253 1157 10.03      
14 A' 988 913 14.32      
15 A' 893 825 18.67      
16 A' 571 528 7.97      
17 A' 372 343 8.69      
18 A' 347 321 0.19      
19 A' 249 230 0.93      
20 A" 3244 2997 12.77      
21 A" 3231 2985 5.72      
22 A" 3156 2915 21.80      
23 A" 1588 1467 2.65      
24 A" 1583 1463 0.42      
25 A" 1501 1386 4.51      
26 A" 1434 1324 0.47      
27 A" 1216 1123 0.46      
28 A" 1047 967 0.13      
29 A" 1014 936 0.84      
30 A" 984 909 0.94      
31 A" 346 319 0.84      
32 A" 226 209 0.03      
33 A" 63 58 7.35      

Unscaled Zero Point Vibrational Energy (zpe) 26012.7 cm-1
Scaled (by 0.9237) Zero Point Vibrational Energy (zpe) 24027.9 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 CID/6-31G*
ABC
0.25827 0.12509 0.09443

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 -0.223 0.586 2.163
H2 -0.223 0.586 -2.163
H3 -1.698 0.125 -1.309
H4 -1.698 0.125 1.309
H5 -1.148 1.797 1.275
H6 -1.148 1.797 -1.275
C7 -0.813 0.761 -1.264
C8 -0.813 0.761 1.264
H9 0.906 1.084 0.000
C10 0.000 0.479 0.000
C11 0.444 -0.961 0.000
H12 -0.380 -1.699 0.000
O13 1.588 -1.330 0.000

Atom - Atom Distances (Å)
  H1 H2 H3 H4 H5 H6 C7 C8 H9 C10 C11 H12 O13
H14.32553.80051.76531.76283.76053.48151.08902.48982.17692.74183.15043.4104
H24.32551.76533.80053.76051.76281.08903.48152.48982.17692.74183.15043.4104
H33.80051.76532.61883.12711.76031.09072.79463.06802.17312.73502.60353.8249
H41.76533.80052.61881.76033.12712.79461.09073.06802.17312.73502.60353.8249
H51.76283.76053.12711.76032.55082.76301.08882.52012.16373.43033.79954.3462
H63.76051.76281.76033.12712.55081.08882.76302.52012.16373.43033.79954.3462
C73.48151.08901.09072.79462.76301.08882.52802.15771.52912.47842.79933.4256
C81.08903.48152.79461.09071.08882.76302.52802.15771.52912.47842.79933.4256
H92.48982.48983.06803.06802.52012.52012.15772.15771.08932.09723.06582.5089
C102.17692.17692.17312.17312.16372.16371.52911.52911.08931.50692.21062.4071
C112.74182.74182.73502.73503.43033.43032.47842.47842.09721.50691.10551.2026
H123.15043.15042.60352.60353.79953.79952.79932.79933.06582.21061.10552.0025
O133.41043.41043.82493.82494.34624.34623.42563.42562.50892.40711.20262.0025

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 108.161 H1 C8 H5 108.083
H1 C8 C10 111.390 H2 C7 H3 108.161
H2 C7 H6 108.083 H2 C7 C10 111.390
H3 C7 H6 107.738 H3 C7 C10 110.989
H4 C8 H5 107.738 H4 C8 C10 110.989
H5 C8 C10 110.348 H6 C7 C10 110.348
C7 C10 C8 111.510 C7 C10 H9 109.841
C7 C10 C11 109.437 C8 C10 H9 109.841
C8 C10 C11 109.437 H9 C10 C11 106.650
C10 C11 H12 114.731 C10 C11 O13 124.966
H12 C11 O13 120.303
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability