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All results from a given calculation for C4H8 (cyclobutane)

using model chemistry: MP4/6-311G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2D 1A1
Energy calculated at MP4/6-311G**
 hartrees
Energy at 0K-156.806398
Energy at 298.15K-156.815620
HF Energy-156.133407
Nuclear repulsion energy126.747610
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 MP4/6-311G**
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 3109 3014        
2 A1 3065 2972        
3 A1 1536 1490        
4 A1 1189 1153        
5 A1 1033 1002        
6 A1 257 249        
7 A2 1249 1212        
8 A2 964 934        
9 B1 1269 1230        
10 B1 1165 1130        
11 B1 948 919        
12 B2 3137 3042        
13 B2 3058 2965        
14 B2 1503 1458        
15 B2 919 891        
16 B2 626 607        
17 E 3120 3026        
17 E 3120 3026        
18 E 3059 2966        
18 E 3059 2966        
19 E 1497 1451        
19 E 1497 1451        
20 E 1299 1260        
20 E 1299 1260        
21 E 1256 1218        
21 E 1256 1218        
22 E 923 895        
22 E 923 895        
23 E 766 743        
23 E 766 743        

Unscaled Zero Point Vibrational Energy (zpe) 24432.6 cm-1
Scaled (by 0.9697) Zero Point Vibrational Energy (zpe) 23692.3 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 MP4/6-311G**
ABC
0.35477 0.35477 0.21269

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/6-311G**

Point Group is D2d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.079 0.152
C2 0.000 -1.079 0.152
C3 -1.079 0.000 -0.152
C4 1.079 0.000 -0.152
H5 0.000 1.339 1.218
H6 0.000 1.999 -0.445
H7 0.000 -1.339 1.218
H8 0.000 -1.999 -0.445
H9 -1.339 0.000 -1.218
H10 -1.999 0.000 0.445
H11 1.339 0.000 -1.218
H12 1.999 0.000 0.445

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12
C12.15871.55641.55641.09771.09612.64333.13552.19912.29052.19912.2905
C22.15871.55641.55642.64333.13551.09771.09612.19912.29052.19912.2905
C31.55641.55642.15872.19912.29052.19912.29051.09771.09612.64333.1355
C41.55641.55642.15872.19912.29052.19912.29052.64333.13551.09771.0961
H51.09772.64332.19912.19911.78912.67853.72943.08622.52733.08622.5273
H61.09613.13552.29052.29051.78913.72943.99772.52732.96342.52732.9634
H72.64331.09772.19912.19912.67853.72941.78913.08622.52733.08622.5273
H83.13551.09612.29052.29053.72943.99771.78912.52732.96342.52732.9634
H92.19912.19911.09772.64333.08622.52733.08622.52731.78912.67853.7294
H102.29052.29051.09613.13552.52732.96342.52732.96341.78913.72943.9977
H112.19912.19912.64331.09773.08622.52733.08622.52732.67853.72941.7891
H122.29052.29053.13551.09612.52732.96342.52732.96343.72943.99771.7891

picture of cyclobutane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 C2 87.818 C1 C3 H9 110.717
C1 C3 H10 118.399 C1 C4 C2 87.818
C1 C4 H11 110.717 C1 C4 H12 118.399
C2 C3 H9 110.717 C2 C3 H10 118.399
C2 C4 H11 110.717 C2 C4 H12 118.399
C3 C1 C4 87.818 C3 C1 H5 110.717
C3 C1 H6 118.399 C3 C2 C4 87.818
C3 C2 H7 110.717 C3 C2 H8 118.399
C4 C1 H5 110.717 C4 C1 H6 118.399
C4 C2 H7 110.717 C4 C2 H8 118.399
H5 C1 H6 109.281 H7 C2 H8 109.281
H9 C3 H10 109.281 H11 C4 H12 109.281
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability