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All results from a given calculation for CH2BrCH2Br (Ethane, 1,2-dibromo-)

using model chemistry: QCISD(T)/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1Ag
1 2 no C2 1A

Conformer 1 (C2H)

Jump to S1C2
Energy calculated at QCISD(T)/cc-pVTZ
 hartrees
Energy at 0K-5223.892233
Energy at 298.15K 
HF Energy-5223.022643
Nuclear repulsion energy418.329636
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 QCISD(T)/cc-pVTZ
Rotational Constants (cm-1) from geometry optimized at QCISD(T)/cc-pVTZ
ABC
0.94736 0.01980 0.01954

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/cc-pVTZ

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.493 0.573 0.000
C2 -0.493 -0.573 0.000
Br3 -0.493 2.257 0.000
Br4 0.493 -2.257 0.000
H5 1.116 0.571 0.890
H6 1.116 0.571 -0.890
H7 -1.116 -0.571 0.890
H8 -1.116 -0.571 -0.890

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 H5 H6 H7 H8
C11.51201.95192.83041.08631.08632.16582.1658
C21.51202.83041.95192.16582.16581.08631.0863
Br31.95192.83044.62122.49472.49473.03023.0302
Br42.83041.95194.62123.03023.03022.49472.4947
H51.08632.16582.49473.03021.78022.50733.0750
H61.08632.16582.49473.03021.78023.07502.5073
H72.16581.08633.03022.49472.50733.07501.7802
H82.16581.08633.03022.49473.07502.50731.7802

picture of Ethane, 1,2-dibromo- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 Br4 108.933 C1 C2 H7 111.889
C1 C2 H8 111.889 C2 C1 Br3 108.933
C2 C1 H5 111.889 C2 C1 H6 111.889
Br3 C1 H5 106.914 Br3 C1 H6 106.914
Br4 C2 H7 106.914 Br4 C2 H8 106.914
H5 C1 H6 110.045 H7 C2 H8 110.045
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C2)

Jump to S1C1
Energy calculated at QCISD(T)/cc-pVTZ
 hartrees
Energy at 0K-5223.889132
Energy at 298.15K 
HF Energy-5223.018436
Nuclear repulsion energy452.954655
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 QCISD(T)/cc-pVTZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A 3154 2992        
2 A 3096 2937        
3 A 1471 1395        
4 A 1315 1248        
5 A 1197 1135        
6 A 1046 992        
7 A 915 868        
8 A 575 545        
9 A 231 219        
10 A 81 77        
11 B 3166 3003        
12 B 3088 2930        
13 B 1466 1391        
14 B 1286 1220        
15 B 1128 1070        
16 B 856 812        
17 B 608 577        
18 B 357 339        

Unscaled Zero Point Vibrational Energy (zpe) 12517.5 cm-1
Scaled (by 0.9486) Zero Point Vibrational Energy (zpe) 11874.1 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 QCISD(T)/cc-pVTZ
ABC
0.25450 0.03100 0.02846

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/cc-pVTZ

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.314 0.688 1.178
C2 -0.314 -0.688 1.178
Br3 -0.314 1.792 -0.293
Br4 0.314 -1.792 -0.293
H5 0.041 1.217 2.091
H6 1.397 0.636 1.093
H7 -0.041 -1.217 2.091
H8 -1.397 -0.636 1.093

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 H5 H6 H7 H8
C11.51311.94392.88361.08911.08702.14182.1653
C21.51312.88361.94392.14182.16531.08911.0870
Br31.94392.88363.63852.47782.48723.84812.9977
Br42.88361.94393.63853.84812.99772.47782.4872
H51.08912.14182.47783.84811.78042.43492.5487
H61.08702.16532.48722.99771.78042.54873.0695
H72.14181.08913.84812.47782.43492.54871.7804
H82.16531.08702.99772.48722.54873.06951.7804

picture of Ethane, 1,2-dibromo- state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 Br4 112.455 C1 C2 H7 109.713
C1 C2 H8 111.722 C2 C1 Br3 112.455
C2 C1 H5 109.713 C2 C1 H6 111.722
Br3 C1 H5 106.100 Br3 C1 H6 106.859
Br4 C2 H7 106.100 Br4 C2 H8 106.859
H5 C1 H6 109.798 H7 C2 H8 109.798
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability