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All results from a given calculation for C4H8 (cyclobutane)

using model chemistry: CID/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 CID/6-31G
 hartrees
Energy at 0K-156.387943
Energy at 298.15K-156.397216
HF Energy-156.029514
Nuclear repulsion energy126.045148
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 CID/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 3167 2962 0.00      
2 A1 3130 2927 0.00      
3 A1 1607 1503 0.00      
4 A1 1255 1174 0.00      
5 A1 1038 971 0.00      
6 A1 220 205 0.00      
7 A2 1348 1260 0.00      
8 A2 1009 944 0.00      
9 B1 1328 1242 0.00      
10 B1 1230 1150 0.00      
11 B1 972 909 0.00      
12 B2 3195 2988 105.69      
13 B2 3118 2916 13.99      
14 B2 1586 1483 4.31      
15 B2 950 888 0.00      
16 B2 669 626 2.60      
17 E 3176 2971 22.79      
17 E 3176 2971 22.79      
18 E 3120 2917 65.24      
18 E 3120 2917 65.24      
19 E 1579 1477 1.56      
19 E 1579 1477 1.56      
20 E 1369 1280 1.67      
20 E 1369 1280 1.67      
21 E 1303 1218 0.25      
21 E 1303 1218 0.25      
22 E 940 879 4.05      
22 E 940 879 4.05      
23 E 799 747 0.20      
23 E 799 747 0.20      

Unscaled Zero Point Vibrational Energy (zpe) 25196.2 cm-1
Scaled (by 0.9352) Zero Point Vibrational Energy (zpe) 23563.5 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 CID/6-31G
ABC
0.35127 0.35127 0.20769

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

Point Group is D2d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.092 0.128
C2 0.000 -1.092 0.128
C3 -1.092 0.000 -0.128
C4 1.092 0.000 -0.128
H5 0.000 1.424 1.172
H6 0.000 1.974 -0.518
H7 0.000 -1.424 1.172
H8 0.000 -1.974 -0.518
H9 -1.424 0.000 -1.172
H10 -1.974 0.000 0.518
H11 1.424 0.000 -1.172
H12 1.974 0.000 0.518

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12
C12.18501.56611.56611.09521.09322.72403.13402.21582.28982.21582.2898
C22.18501.56611.56612.72403.13401.09521.09322.21582.28982.21582.2898
C31.56611.56612.18502.21582.28982.21582.28981.09521.09322.72403.1340
C41.56611.56612.18502.21582.28982.21582.28982.72403.13401.09521.0932
H51.09522.72402.21582.21581.77772.84713.79493.08972.52003.08972.5200
H61.09323.13402.28982.28981.77773.79493.94822.52002.97812.52002.9781
H72.72401.09522.21582.21582.84713.79491.77773.08972.52003.08972.5200
H83.13401.09322.28982.28983.79493.94821.77772.52002.97812.52002.9781
H92.21582.21581.09522.72403.08972.52003.08972.52001.77772.84713.7949
H102.28982.28981.09323.13402.52002.97812.52002.97811.77773.79493.9482
H112.21582.21582.72401.09523.08972.52003.08972.52002.84713.79491.7777
H122.28982.28983.13401.09322.52002.97812.52002.97813.79493.94821.7777

picture of cyclobutane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 C2 88.470 C1 C3 H9 111.509
C1 C3 H10 117.773 C1 C4 C2 88.470
C1 C4 H11 111.509 C1 C4 H12 117.773
C2 C3 H9 111.509 C2 C3 H10 117.773
C2 C4 H11 111.509 C2 C4 H12 117.773
C3 C1 C4 88.470 C3 C1 H5 111.509
C3 C1 H6 117.773 C3 C2 C4 88.470
C3 C2 H7 111.509 C3 C2 H8 117.773
C4 C1 H5 111.509 C4 C1 H6 117.773
C4 C2 H7 111.509 C4 C2 H8 117.773
H5 C1 H6 108.654 H7 C2 H8 108.654
H9 C3 H10 108.654 H11 C4 H12 108.654
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability