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All results from a given calculation for C4H8 (cyclobutane)

using model chemistry: CCD/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 CCD/aug-cc-pVDZ
 hartrees
Energy at 0K-156.750616
Energy at 298.15K-156.759785
HF Energy-156.111821
Nuclear repulsion energy126.183308
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 CCD/aug-cc-pVDZ
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 3120 3009 0.00      
2 A1 3077 2967 0.00      
3 A1 1526 1472 0.00      
4 A1 1179 1137 0.00      
5 A1 1034 997 0.00      
6 A1 226 218 0.00      
7 A2 1251 1207 0.00      
8 A2 956 922 0.00      
9 B1 1261 1216 0.00      
10 B1 1168 1127 0.00      
11 B1 952 919 0.00      
12 B2 3146 3035 96.04      
13 B2 3069 2960 17.02      
14 B2 1487 1434 3.40      
15 B2 908 876 0.12      
16 B2 625 603 1.41      
17 E 3131 3020 26.71      
17 E 3131 3020 26.71      
18 E 3070 2961 68.28      
18 E 3070 2961 68.28      
19 E 1482 1429 0.37      
19 E 1482 1429 0.37      
20 E 1290 1244 0.93      
20 E 1290 1244 0.93      
21 E 1249 1205 0.09      
21 E 1249 1205 0.09      
22 E 922 889 2.06      
22 E 922 889 2.06      
23 E 752 725 0.16      
23 E 752 725 0.16      

Unscaled Zero Point Vibrational Energy (zpe) 24387.2 cm-1
Scaled (by 0.9645) Zero Point Vibrational Energy (zpe) 23521.4 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 CCD/aug-cc-pVDZ
ABC
0.35211 0.35211 0.20999

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

Point Group is D2d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.086 0.141
C2 0.000 -1.086 0.141
C3 -1.086 0.000 -0.141
C4 1.086 0.000 -0.141
H5 0.000 1.379 1.204
H6 0.000 1.994 -0.482
H7 0.000 -1.379 1.204
H8 0.000 -1.994 -0.482
H9 -1.379 0.000 -1.204
H10 -1.994 0.000 0.482
H11 1.379 0.000 -1.204
H12 1.994 0.000 0.482

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12
C12.17151.56121.56121.10291.10142.68403.14222.21122.29602.21122.2960
C22.17151.56121.56122.68403.14221.10291.10142.21122.29602.21122.2960
C31.56121.56122.17152.21122.29602.21122.29601.10291.10142.68403.1422
C41.56121.56122.17152.21122.29602.21122.29602.68403.14221.10291.1014
H51.10292.68402.21122.21121.79492.75723.77073.09892.52973.09892.5297
H61.10143.14222.29602.29601.79493.77073.98842.52972.98022.52972.9802
H72.68401.10292.21122.21122.75723.77071.79493.09892.52973.09892.5297
H83.14221.10142.29602.29603.77073.98841.79492.52972.98022.52972.9802
H92.21122.21121.10292.68403.09892.52973.09892.52971.79492.75723.7707
H102.29602.29601.10143.14222.52972.98022.52972.98021.79493.77073.9884
H112.21122.21122.68401.10293.09892.52973.09892.52972.75723.77071.7949
H122.29602.29603.14221.10142.52972.98022.52972.98023.77073.98841.7949

picture of cyclobutane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 C2 88.130 C1 C3 H9 111.027
C1 C3 H10 118.133 C1 C4 C2 88.130
C1 C4 H11 111.027 C1 C4 H12 118.133
C2 C3 H9 111.027 C2 C3 H10 118.133
C2 C4 H11 111.027 C2 C4 H12 118.133
C3 C1 C4 88.130 C3 C1 H5 111.027
C3 C1 H6 118.133 C3 C2 C4 88.130
C3 C2 H7 111.027 C3 C2 H8 118.133
C4 C1 H5 111.027 C4 C1 H6 118.133
C4 C2 H7 111.027 C4 C2 H8 118.133
H5 C1 H6 109.031 H7 C2 H8 109.031
H9 C3 H10 109.031 H11 C4 H12 109.031
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability