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All results from a given calculation for C4H8 (methylcyclopropane)

using model chemistry: B3PW91/TZVP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3PW91/TZVP
 hartrees
Energy at 0K-157.210873
Energy at 298.15K-157.219472
HF Energy-157.210873
Nuclear repulsion energy124.486998
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 B3PW91/TZVP
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' 3224 3109 23.82      
2 A' 3145 3033 18.76      
3 A' 3135 3023 12.97      
4 A' 3100 2989 19.09      
5 A' 3029 2921 34.98      
6 A' 1514 1460 1.60      
7 A' 1497 1443 10.04      
8 A' 1424 1373 4.16      
9 A' 1393 1343 1.58      
10 A' 1240 1196 0.00      
11 A' 1212 1169 0.00      
12 A' 1053 1016 7.65      
13 A' 1007 971 12.17      
14 A' 943 910 3.46      
15 A' 803 774 6.12      
16 A' 776 749 2.90      
17 A' 364 351 0.21      
18 A" 3209 3095 0.22      
19 A" 3130 3019 25.31      
20 A" 3096 2986 28.57      
21 A" 1488 1435 2.40      
22 A" 1466 1414 4.06      
23 A" 1196 1153 0.81      
24 A" 1141 1100 0.09      
25 A" 1109 1069 5.28      
26 A" 1069 1031 1.82      
27 A" 882 850 8.94      
28 A" 823 793 5.47      
29 A" 346 333 0.82      
30 A" 225 217 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 24019.1 cm-1
Scaled (by 0.9643) Zero Point Vibrational Energy (zpe) 23161.6 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 B3PW91/TZVP
ABC
0.52453 0.21231 0.18652

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/TZVP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.345 0.401 0.000
C2 -0.877 1.281 0.000
H3 1.288 0.939 0.000
C4 0.345 -0.898 0.752
C5 0.345 -0.898 -0.752
H6 1.250 -1.202 1.264
H7 1.250 -1.202 -1.264
H8 -0.570 -1.187 1.257
H9 -0.570 -1.187 -1.257
H10 -1.791 0.680 0.000
H11 -0.903 1.924 0.884
H12 -0.903 1.924 -0.884

Atom - Atom Distances (Å)
  C1 C2 H3 C4 C5 H6 H7 H8 H9 H10 H11 H12
C11.50611.08621.50081.50082.23302.23302.22242.22242.15382.15912.1591
C21.50612.19212.60932.60933.50563.50562.78722.78721.09361.09381.0938
H31.08622.19212.19792.19792.48672.48673.09113.09113.08982.56042.5604
C41.50082.60932.19791.50411.08362.23091.08442.22672.76023.08913.4933
C51.50082.60932.19791.50412.23091.08362.22671.08442.76023.49333.0891
H62.23303.50562.48671.08362.23092.52831.82023.10983.79333.81524.3621
H72.23303.50562.48672.23091.08362.52833.10981.82023.79334.36213.8152
H82.22242.78723.09111.08442.22671.82023.10982.51472.56123.15163.7922
H92.22242.78723.09112.22671.08443.10981.82022.51472.56123.79223.1516
H102.15381.09363.08982.76022.76023.79333.79332.56122.56121.76561.7656
H112.15911.09382.56043.08913.49333.81524.36213.15163.79221.76561.7687
H122.15911.09382.56043.49333.08914.36213.81523.79223.15161.76561.7687

picture of methylcyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H10 110.894 C1 C2 H11 111.301
C1 C2 H12 111.301 C1 C4 H5 59.929
C1 C4 H6 118.652 C1 C4 H8 117.654
C1 H5 C4 59.929 C1 H5 H7 118.652
C1 H5 H9 117.654 C2 C1 C3 114.501
C2 C1 C4 120.401 C2 C1 H5 120.401
C3 C1 C4 115.401 C3 C1 H5 115.401
C4 C1 H5 60.142 C4 H5 H7 118.205
C4 H5 H9 117.776 H5 C4 H6 118.205
H5 C4 H8 117.776 H6 C4 H8 114.198
H7 H5 H9 114.198 H10 C2 H11 107.638
H10 C2 H12 107.638 H11 C2 H12 107.898
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/TZVP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.097      
2 C -0.351      
3 H 0.156      
4 C -0.314      
5 C -0.314      
6 H 0.145      
7 H 0.145      
8 H 0.139      
9 H 0.139      
10 H 0.106      
11 H 0.122      
12 H 0.122      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.026 0.141 0.000 0.143
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.271 0.206 0.000
y 0.206 -27.306 0.000
z 0.000 0.000 -27.069
Traceless
 xyz
x 1.917 0.206 0.000
y 0.206 -1.136 0.000
z 0.000 0.000 -0.781
Polar
3z2-r2-1.562
x2-y22.035
xy0.206
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.549 -0.473 0.000
y -0.473 7.300 0.000
z 0.000 0.000 6.779


<r2> (average value of r2) Å2
<r2> 83.274
(<r2>)1/2 9.125