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 C4H8 (cyclobutane)

using model chemistry: B2PLYP=FULL/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2D 1A1
Energy calculated at B2PLYP=FULL/6-31G
 hartrees
Energy at 0K-156.902574
Energy at 298.15K-156.911754
HF Energy-156.779682
Nuclear repulsion energy126.089908
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 B2PLYP=FULL/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 A1 3134 3134 0.00      
2 A1 3096 3096 0.00      
3 A1 1576 1576 0.00      
4 A1 1221 1221 0.00      
5 A1 1018 1018 0.00      
6 A1 197 197 0.00      
7 A2 1317 1317 0.00      
8 A2 994 994 0.00      
9 B1 1297 1297 0.00      
10 B1 1203 1203 0.00      
11 B1 956 956 0.00      
12 B2 3165 3165 108.38      
13 B2 3087 3087 11.09      
14 B2 1556 1556 3.73      
15 B2 915 915 0.05      
16 B2 661 661 3.29      
17 E 3146 3146 18.75      
17 E 3146 3146 18.75      
18 E 3088 3088 73.71      
18 E 3088 3088 73.71      
19 E 1548 1548 1.44      
19 E 1548 1548 1.44      
20 E 1331 1331 1.30      
20 E 1331 1331 1.30      
21 E 1278 1278 0.43      
21 E 1278 1278 0.43      
22 E 923 923 3.69      
22 E 923 923 3.69      
23 E 784 784 0.25      
23 E 784 784 0.25      

Unscaled Zero Point Vibrational Energy (zpe) 24793.0 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 24793.0 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 B2PLYP=FULL/6-31G
ABC
0.35173 0.35173 0.20750

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/6-31G

Point Group is D2d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.093 0.122
C2 0.000 -1.093 0.122
C3 -1.093 0.000 -0.122
C4 1.093 0.000 -0.122
H5 0.000 1.440 1.161
H6 0.000 1.965 -0.537
H7 0.000 -1.440 1.161
H8 0.000 -1.965 -0.537
H9 -1.440 0.000 -1.161
H10 -1.965 0.000 0.537
H11 1.440 0.000 -1.161
H12 1.965 0.000 0.537

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12
C12.18561.56461.56461.09481.09322.73703.12802.21622.28642.21622.2864
C22.18561.56461.56462.73703.12801.09481.09322.21622.28642.21622.2864
C31.56461.56462.18562.21622.28642.21622.28641.09481.09322.73703.1280
C41.56461.56462.18562.21622.28642.21622.28642.73703.12801.09481.0932
H51.09482.73702.21622.21621.77702.87903.80423.08732.51443.08732.5144
H61.09323.12802.28642.28641.77703.80423.92992.51442.97922.51442.9792
H72.73701.09482.21622.21622.87903.80421.77703.08732.51443.08732.5144
H83.12801.09322.28642.28643.80423.92991.77702.51442.97922.51442.9792
H92.21622.21621.09482.73703.08732.51443.08732.51441.77702.87903.8042
H102.28642.28641.09323.12802.51442.97922.51442.97921.77703.80423.9299
H112.21622.21622.73701.09483.08732.51443.08732.51442.87903.80421.7770
H122.28642.28643.12801.09322.51442.97922.51442.97923.80423.92991.7770

picture of cyclobutane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 C2 88.605 C1 C3 H9 111.667
C1 C3 H10 117.592 C1 C4 C2 88.605
C1 C4 H11 111.667 C1 C4 H12 117.592
C2 C3 H9 111.667 C2 C3 H10 117.592
C2 C4 H11 111.667 C2 C4 H12 117.592
C3 C1 C4 88.605 C3 C1 H5 111.667
C3 C1 H6 117.592 C3 C2 C4 88.605
C3 C2 H7 111.667 C3 C2 H8 117.592
C4 C1 H5 111.667 C4 C1 H6 117.592
C4 C2 H7 111.667 C4 C2 H8 117.592
H5 C1 H6 108.614 H7 C2 H8 108.614
H9 C3 H10 108.614 H11 C4 H12 108.614
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability