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 CH2C(CH3)CH3 (1-Propene, 2-methyl-)

using model chemistry: HF/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at HF/6-31G(2df,p)
 hartrees
Energy at 0K-156.132199
Energy at 298.15K-156.140356
Nuclear repulsion energy120.208344
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(2df,p)
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3290 2979 10.40      
2 A1 3252 2945 26.55      
3 A1 3159 2861 48.95      
4 A1 1874 1696 20.48      
5 A1 1621 1468 9.58      
6 A1 1568 1420 0.05      
7 A1 1533 1388 0.50      
8 A1 1176 1065 2.68      
9 A1 858 777 0.05      
10 A1 401 363 0.34      
11 A2 3200 2898 0.00      
12 A2 1590 1440 0.00      
13 A2 1109 1004 0.00      
14 A2 768 696 0.00      
15 A2 183 166 0.00      
16 B1 3206 2903 67.93      
17 B1 1608 1456 12.17      
18 B1 1207 1092 0.01      
19 B1 1046 947 44.04      
20 B1 478 433 5.08      
21 B1 228 206 0.28      
22 B2 3366 3048 22.65      
23 B2 3250 2943 31.50      
24 B2 3152 2855 21.46      
25 B2 1603 1451 3.32      
26 B2 1539 1393 4.32      
27 B2 1394 1262 3.37      
28 B2 1058 958 0.25      
29 B2 1034 936 0.01      
30 B2 468 424 1.91      

Unscaled Zero Point Vibrational Energy (zpe) 25107.9 cm-1
Scaled (by 0.9055) Zero Point Vibrational Energy (zpe) 22735.2 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(2df,p)
ABC
0.30915 0.28046 0.15540

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/6-31G(2df,p)

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.129
C2 0.000 0.000 1.446
H3 0.000 0.915 2.012
H4 0.000 -0.915 2.012
C5 0.000 1.274 -0.676
C6 0.000 -1.274 -0.676
H7 0.000 2.151 -0.038
H8 0.874 1.322 -1.322
H9 -0.874 1.322 -1.322
H10 0.000 -2.151 -0.038
H11 -0.874 -1.322 -1.322
H12 0.874 -1.322 -1.322

Atom - Atom Distances (Å)
  C1 C2 H3 H4 C5 C6 H7 H8 H9 H10 H11 H12
C11.31782.09442.09441.50701.50702.15702.14842.14842.15702.14842.1484
C21.31781.07621.07622.47552.47552.61323.19013.19012.61323.19013.1901
H32.09441.07621.83082.71213.46722.39383.47133.47133.68844.10964.1096
H42.09441.07621.83083.46722.71213.68844.10964.10962.39383.47133.4713
C51.50702.47552.71213.46722.54871.08361.08801.08803.48372.81442.8144
C61.50702.47553.46722.71212.54873.48372.81442.81441.08361.08801.0880
H72.15702.61322.39383.68841.08363.48371.76071.76074.30103.80383.8038
H82.14843.19013.47134.10961.08802.81441.76071.74753.80383.16872.6433
H92.14843.19013.47134.10961.08802.81441.76071.74753.80382.64333.1687
H102.15702.61323.68842.39383.48371.08364.30103.80383.80381.76071.7607
H112.14843.19014.10963.47132.81441.08803.80383.16872.64331.76071.7475
H122.14843.19014.10963.47132.81441.08803.80382.64333.16871.76071.7475

picture of 1-Propene, 2-methyl- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H3 121.727 C1 C2 H4 121.727
C1 C5 H7 111.692 C1 C5 H8 110.731
C1 C5 H9 110.731 C1 C6 H10 111.692
C1 C6 H11 110.731 C1 C6 H12 110.731
C2 C1 C5 122.261 C2 C1 C6 122.261
H3 C2 H4 116.545 C5 C1 C6 115.477
H7 C5 H8 108.337 H7 C5 H9 108.337
H8 C5 H9 106.845 H10 C6 H11 108.337
H10 C6 H12 108.337 H11 C6 H12 106.845
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.213      
2 C -0.421      
3 H 0.133      
4 H 0.133      
5 C -0.448      
6 C -0.448      
7 H 0.142      
8 H 0.138      
9 H 0.138      
10 H 0.142      
11 H 0.138      
12 H 0.138      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -0.484 0.484
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -27.866 0.000 0.000
y 0.000 -25.691 0.000
z 0.000 0.000 -26.008
Traceless
 xyz
x -2.016 0.000 0.000
y 0.000 1.246 0.000
z 0.000 0.000 0.770
Polar
3z2-r21.540
x2-y2-2.174
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.511 0.000 0.000
y 0.000 6.307 0.000
z 0.000 0.000 8.223


<r2> (average value of r2) Å2
<r2> 90.250
(<r2>)1/2 9.500