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All results from a given calculation for C4H8 (methylcyclopropane)

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-157.176611
Energy at 298.15K-157.185214
HF Energy-157.176611
Nuclear repulsion energy124.350830
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' 3262 3094 26.25      
2 A' 3181 3017 17.21      
3 A' 3174 3010 18.40      
4 A' 3140 2978 18.73      
5 A' 3065 2907 34.33      
6 A' 1551 1471 1.10      
7 A' 1533 1454 8.20      
8 A' 1459 1383 3.18      
9 A' 1420 1346 2.35      
10 A' 1261 1196 0.12      
11 A' 1232 1168 0.07      
12 A' 1081 1025 5.62      
13 A' 1023 970 11.68      
14 A' 956 907 3.62      
15 A' 815 773 6.41      
16 A' 786 746 1.22      
17 A' 365 346 0.20      
18 A" 3248 3080 0.28      
19 A" 3169 3006 25.03      
20 A" 3139 2977 29.35      
21 A" 1526 1447 2.08      
22 A" 1497 1420 2.17      
23 A" 1216 1153 0.54      
24 A" 1160 1100 0.34      
25 A" 1127 1069 5.43      
26 A" 1086 1030 1.85      
27 A" 903 856 7.27      
28 A" 830 787 5.29      
29 A" 344 326 0.80      
30 A" 227 215 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 24387.3 cm-1
Scaled (by 0.9483) Zero Point Vibrational Energy (zpe) 23126.5 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
0.52351 0.21182 0.18614

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)
C1 0.345 0.401 0.000
C2 -0.878 1.282 0.000
H3 1.289 0.942 0.000
C4 0.345 -0.899 0.752
C5 0.345 -0.899 -0.752
H6 1.252 -1.203 1.267
H7 1.252 -1.203 -1.267
H8 -0.570 -1.190 1.260
H9 -0.570 -1.190 -1.260
H10 -1.793 0.680 0.000
H11 -0.905 1.926 0.886
H12 -0.905 1.926 -0.886

Atom - Atom Distances (Å)
  C1 C2 H3 C4 C5 H6 H7 H8 H9 H10 H11 H12
C11.50771.08791.50231.50232.23572.23572.22622.22622.15612.16212.1621
C21.50772.19392.61192.61193.50943.50942.79182.79181.09521.09521.0952
H31.08792.19392.20162.20162.49122.49123.09653.09653.09312.56312.5631
C41.50232.61192.20161.50431.08532.23361.08622.22922.76253.09293.4972
C51.50232.61192.20161.50432.23361.08532.22921.08622.76253.49723.0929
H62.23573.50942.49121.08532.23362.53341.82153.11443.79693.81954.3676
H72.23573.50942.49122.23361.08532.53343.11441.82153.79694.36763.8195
H82.22622.79183.09651.08622.22921.82153.11442.51912.56493.15653.7980
H92.22622.79183.09652.22921.08623.11441.82152.51912.56493.79803.1565
H102.15611.09523.09312.76252.76253.79693.79692.56492.56491.76761.7676
H112.16211.09522.56313.09293.49723.81954.36763.15653.79801.76761.7711
H122.16211.09522.56313.49723.09294.36763.81953.79803.15651.76761.7711

picture of methylcyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H10 110.866 C1 C2 H11 111.338
C1 C2 H12 111.338 C1 C4 H5 59.955
C1 C4 H6 118.654 C1 C4 H8 117.746
C1 H5 C4 59.955 C1 H5 H7 118.654
C1 H5 H9 117.746 C2 C1 C3 114.423
C2 C1 C4 120.395 C2 C1 H5 120.395
C3 C1 C4 115.488 C3 C1 H5 115.488
C4 C1 H5 60.089 C4 H5 H7 118.301
C4 H5 H9 117.850 H5 C4 H6 118.301
H5 C4 H8 117.850 H6 C4 H8 114.028
H7 H5 H9 114.028 H10 C2 H11 107.607
H10 C2 H12 107.607 H11 C2 H12 107.910
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.136      
2 C -0.521      
3 H 0.172      
4 C -0.367      
5 C -0.367      
6 H 0.178      
7 H 0.178      
8 H 0.176      
9 H 0.176      
10 H 0.165      
11 H 0.173      
12 H 0.173      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.025 0.102 0.000 0.105
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -24.798 0.190 0.000
y 0.190 -26.769 0.000
z 0.000 0.000 -26.544
Traceless
 xyz
x 1.859 0.190 0.000
y 0.190 -1.098 0.000
z 0.000 0.000 -0.761
Polar
3z2-r2-1.522
x2-y21.971
xy0.190
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.788 -0.395 0.000
y -0.395 6.230 0.000
z 0.000 0.000 5.837


<r2> (average value of r2) Å2
<r2> 83.106
(<r2>)1/2 9.116