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All results from a given calculation for C4H8 (cyclobutane)

using model chemistry: wB97X-D/CEP-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2D 1A1
Energy calculated at wB97X-D/CEP-31G
 hartrees
Energy at 0K-27.370023
Energy at 298.15K-27.379083
HF Energy-27.370023
Nuclear repulsion energy70.719646
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 wB97X-D/CEP-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 A1 3143 3143 0.00      
2 A1 3110 3110 0.00      
3 A1 1541 1541 0.00      
4 A1 1141 1141 0.00      
5 A1 1036 1036 0.00      
6 A1 143 143 0.00      
7 A2 1297 1297 0.00      
8 A2 980 980 0.00      
9 B1 1267 1267 0.00      
10 B1 1202 1202 0.00      
11 B1 1001 1001 0.00      
12 B2 3189 3189 204.26      
13 B2 3089 3089 12.29      
14 B2 1504 1504 5.19      
15 B2 871 871 2.16      
16 B2 659 659 8.06      
17 E 3164 3164 14.06      
17 E 3164 3164 14.06      
18 E 3095 3095 116.63      
18 E 3095 3095 116.63      
19 E 1506 1506 4.83      
19 E 1506 1506 4.83      
20 E 1313 1313 6.40      
20 E 1313 1313 6.40      
21 E 1256 1256 0.15      
21 E 1256 1256 0.15      
22 E 946 946 7.89      
22 E 946 946 7.89      
23 E 762 762 1.18      
23 E 762 762 1.18      

Unscaled Zero Point Vibrational Energy (zpe) 24627.3 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 24627.3 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 wB97X-D/CEP-31G
ABC
0.34762 0.34762 0.20400

See section I.F.4 to change rotational constant units
Geometric Data calculated at wB97X-D/CEP-31G

Point Group is D2d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.102 0.108
C2 0.000 -1.102 0.108
C3 -1.102 0.000 -0.108
C4 1.102 0.000 -0.108
H5 0.000 1.495 1.136
H6 0.000 1.950 -0.593
H7 0.000 -1.495 1.136
H8 0.000 -1.950 -0.593
H9 -1.495 0.000 -1.136
H10 -1.950 0.000 0.593
H11 1.495 0.000 -1.136
H12 1.950 0.000 0.593

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12
C12.20421.57341.57341.10121.09962.79343.13132.23532.29172.23532.2917
C22.20421.57341.57342.79343.13131.10121.09962.23532.29172.23532.2917
C31.57341.57342.20422.23532.29172.23532.29171.10121.09962.79343.1313
C41.57341.57342.20422.23532.29172.23532.29172.79343.13131.10121.0996
H51.10122.79342.23532.23531.78772.98993.85443.10392.51653.10392.5165
H61.09963.13132.29172.29171.78773.85443.89982.51653.00152.51653.0015
H72.79341.10122.23532.23532.98993.85441.78773.10392.51653.10392.5165
H83.13131.09962.29172.29173.85443.89981.78772.51653.00152.51653.0015
H92.23532.23531.10122.79343.10392.51653.10392.51651.78772.98993.8544
H102.29172.29171.09963.13132.51653.00152.51653.00151.78773.85443.8998
H112.23532.23532.79341.10123.10392.51653.10392.51652.98993.85441.7877
H122.29172.29173.13131.09962.51653.00152.51653.00153.85443.89981.7877

picture of cyclobutane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 C2 88.928 C1 C3 H9 112.191
C1 C3 H10 116.937 C1 C4 C2 88.928
C1 C4 H11 112.191 C1 C4 H12 116.937
C2 C3 H9 112.191 C2 C3 H10 116.937
C2 C4 H11 112.191 C2 C4 H12 116.937
C3 C1 C4 88.928 C3 C1 H5 112.191
C3 C1 H6 116.937 C3 C2 C4 88.928
C3 C2 H7 112.191 C3 C2 H8 116.937
C4 C1 H5 112.191 C4 C1 H6 116.937
C4 C2 H7 112.191 C4 C2 H8 116.937
H5 C1 H6 108.647 H7 C2 H8 108.647
H9 C3 H10 108.647 H11 C4 H12 108.647
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at wB97X-D/CEP-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.275      
2 C -0.275      
3 C -0.275      
4 C -0.275      
5 H 0.120      
6 H 0.155      
7 H 0.120      
8 H 0.155      
9 H 0.120      
10 H 0.155      
11 H 0.120      
12 H 0.155      


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 0.000 0.000
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.873 0.000 0.000
y 0.000 -26.873 0.000
z 0.000 0.000 -24.986
Traceless
 xyz
x -0.944 0.000 0.000
y 0.000 -0.944 0.000
z 0.000 0.000 1.887
Polar
3z2-r23.775
x2-y20.000
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.121 0.000 0.000
y 0.000 6.121 0.000
z 0.000 0.000 5.088


<r2> (average value of r2) Å2
<r2> 66.728
(<r2>)1/2 8.169