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All results from a given calculation for C4H6 (Cyclobutene)

using model chemistry: B3LYP/aug-cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B3LYP/aug-cc-pVDZ
 hartrees
Energy at 0K-155.989535
Energy at 298.15K-155.995737
Nuclear repulsion energy112.755358
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 B3LYP/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 3203 3108 22.02      
2 A1 3041 2951 52.58      
3 A1 1628 1580 1.81      
4 A1 1472 1428 0.57      
5 A1 1203 1167 1.84      
6 A1 1129 1095 0.12      
7 A1 994 965 0.00      
8 A1 888 862 0.93      
9 A2 3076 2985 0.00      
10 A2 1158 1124 0.00      
11 A2 1025 994 0.00      
12 A2 898 872 0.00      
13 A2 315 305 0.00      
14 B1 3089 2998 51.92      
15 B1 1083 1051 6.79      
16 B1 854 829 17.46      
17 B1 635 616 50.20      
18 B2 3171 3077 16.14      
19 B2 3036 2946 47.57      
20 B2 1453 1410 0.89      
21 B2 1311 1272 12.34      
22 B2 1216 1180 3.03      
23 B2 894 867 15.00      
24 B2 859 833 0.19      

Unscaled Zero Point Vibrational Energy (zpe) 18814.1 cm-1
Scaled (by 0.9704) Zero Point Vibrational Energy (zpe) 18257.2 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 B3LYP/aug-cc-pVDZ
ABC
0.42894 0.40655 0.22677

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/aug-cc-pVDZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.673 0.816
C2 0.000 -0.673 0.816
C3 0.000 0.787 -0.701
C4 0.000 -0.787 -0.701
H5 0.000 1.423 1.608
H6 0.000 -1.423 1.608
H7 0.893 1.249 -1.147
H8 -0.893 -1.249 -1.147
H9 -0.893 1.249 -1.147
H10 0.893 -1.249 -1.147

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10
C11.34541.52112.10501.09112.24022.23212.88832.23212.8883
C21.34542.10501.52112.24021.09112.88832.23212.88832.2321
C31.52112.10501.57372.39523.19611.09982.26721.09982.2672
C42.10501.52111.57373.19612.39522.26721.09982.26721.0998
H51.09112.24022.39523.19612.84542.90173.94032.90173.9403
H62.24021.09113.19612.39522.84543.94032.90173.94032.9017
H72.23212.88831.09982.26722.90173.94033.07031.78582.4975
H82.88832.23212.26721.09983.94032.90173.07032.49751.7858
H92.23212.88831.09982.26722.90173.94031.78582.49753.0703
H102.88832.23212.26721.09983.94032.90172.49751.78583.0703

picture of Cyclobutene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C4 94.304 C1 C2 H6 133.422
C1 C3 C4 85.696 C1 C3 H7 115.850
C1 C3 H9 115.850 C2 C1 C3 94.304
C2 C1 H5 133.422 C2 C4 C3 85.696
C2 C4 H8 115.850 C2 C4 H10 115.850
C3 C1 H5 132.273 C3 C4 H8 114.833
C3 C4 H10 114.833 C4 C2 H6 132.273
C4 C3 H7 114.833 C4 C3 H9 114.833
H7 C3 H9 108.552 H8 C4 H10 108.552
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability