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All results from a given calculation for C4H8 (cyclobutane)

using model chemistry: MP4/aug-cc-pVDZ

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/aug-cc-pVDZ
 hartrees
Energy at 0K-156.775239
Energy at 298.15K-156.784375
HF Energy-156.111128
Nuclear repulsion energy125.958879
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 MP4/6-31G*
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 3117 3045        
2 A1 3078 3007        
3 A1 1570 1534        
4 A1 1209 1182        
5 A1 1045 1021        
6 A1 242 236        
7 A2 1273 1243        
8 A2 975 953        
9 B1 1289 1259        
10 B1 1187 1160        
11 B1 965 943        
12 B2 3144 3071        
13 B2 3071 3000        
14 B2 1537 1502        
15 B2 926 905        
16 B2 640 626        
17 E 3129 3057        
17 E 3129 3057        
18 E 3072 3001        
18 E 3072 3001        
19 E 1531 1496        
19 E 1531 1496        
20 E 1321 1290        
20 E 1321 1290        
21 E 1271 1241        
21 E 1271 1241        
22 E 937 916        
22 E 937 916        
23 E 775 757        
23 E 775 757        

Unscaled Zero Point Vibrational Energy (zpe) 24669.2 cm-1
Scaled (by 0.9769) Zero Point Vibrational Energy (zpe) 24099.3 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/aug-cc-pVDZ
ABC
0.35065 0.35065 0.20969

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/aug-cc-pVDZ

Point Group is D2d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.087 0.147
C2 0.000 -1.087 0.147
C3 -1.087 0.000 -0.147
C4 1.087 0.000 -0.147
H5 0.000 1.363 1.217
H6 0.000 2.005 -0.464
H7 0.000 -1.363 1.217
H8 0.000 -2.005 -0.464
H9 -1.363 0.000 -1.217
H10 -2.005 0.000 0.464
H11 1.363 0.000 -1.217
H12 2.005 0.000 0.464

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12
C12.17351.56481.56481.10521.10352.67313.15212.21352.30302.21352.3030
C22.17351.56481.56482.67313.15211.10521.10352.21352.30302.21352.3030
C31.56481.56482.17352.21352.30302.21352.30301.10521.10352.67313.1521
C41.56481.56482.17352.21352.30302.21352.30302.67313.15211.10521.1035
H51.10522.67312.21352.21351.80022.72553.76463.10502.53893.10502.5389
H61.10353.15212.30302.30301.80023.76464.01102.53892.98432.53892.9843
H72.67311.10522.21352.21352.72553.76461.80023.10502.53893.10502.5389
H83.15211.10352.30302.30303.76464.01101.80022.53892.98432.53892.9843
H92.21352.21351.10522.67313.10502.53893.10502.53891.80022.72553.7646
H102.30302.30301.10353.15212.53892.98432.53892.98431.80023.76464.0110
H112.21352.21352.67311.10523.10502.53893.10502.53892.72553.76461.8002
H122.30302.30303.15211.10352.53892.98432.53892.98433.76464.01101.8002

picture of cyclobutane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 C2 87.976 C1 C3 H9 110.818
C1 C3 H10 118.300 C1 C4 C2 87.976
C1 C4 H11 110.818 C1 C4 H12 118.300
C2 C3 H9 110.818 C2 C3 H10 118.300
C2 C4 H11 110.818 C2 C4 H12 118.300
C3 C1 C4 87.976 C3 C1 H5 110.818
C3 C1 H6 118.300 C3 C2 C4 87.976
C3 C2 H7 110.818 C3 C2 H8 118.300
C4 C1 H5 110.818 C4 C1 H6 118.300
C4 C2 H7 110.818 C4 C2 H8 118.300
H5 C1 H6 109.181 H7 C2 H8 109.181
H9 C3 H10 109.181 H11 C4 H12 109.181
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability