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

using model chemistry: G2

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 G2
 hartrees
Energy at 0K-5223.604848
Energy at 298.15K-5223.598561
HF Energy-5217.847460
Nuclear repulsion energy417.256784
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 HF/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 Ag 3318 3126 0.00      
2 Ag 1640 1545 0.00      
3 Ag 1433 1350 0.00      
4 Ag 1139 1073 0.00      
5 Ag 724 682 0.00      
6 Ag 204 192 0.00      
7 Au 3405 3208 1.37      
8 Au 1212 1142 2.94      
9 Au 813 766 3.14      
10 Au 110 104 6.01      
11 Bg 3384 3188 0.00      
12 Bg 1412 1331 0.00      
13 Bg 1033 973 0.00      
14 Bu 3323 3131 12.38      
15 Bu 1629 1535 8.21      
16 Bu 1343 1266 97.19      
17 Bu 635 598 104.81      
18 Bu 197 186 7.65      

Unscaled Zero Point Vibrational Energy (zpe) 13477.0 cm-1
Scaled (by 0.9422) Zero Point Vibrational Energy (zpe) 12698.0 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 MP2=FULL/6-31G*
ABC
0.94336 0.01976 0.01950

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G*

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.495 0.568 0.000
C2 -0.495 -0.568 0.000
Br3 -0.495 2.260 0.000
Br4 0.495 -2.260 0.000
H5 1.118 0.567 0.893
H6 1.118 0.567 -0.893
H7 -1.118 -0.567 0.893
H8 -1.118 -0.567 -0.893

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 H5 H6 H7 H8
C11.50781.95982.82801.08861.08862.16552.1655
C21.50782.82801.95982.16552.16551.08861.0886
Br31.95982.82804.62632.50252.50253.02933.0293
Br42.82801.95984.62633.02933.02932.50252.5025
H51.08862.16552.50253.02931.78602.50723.0783
H61.08862.16552.50253.02931.78603.07832.5072
H72.16551.08863.02932.50252.50723.07831.7860
H82.16551.08863.02932.50253.07832.50721.7860

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 109.050 C1 C2 H7 112.179
C1 C2 H8 112.179 C2 C1 Br3 109.050
C2 C1 H5 112.179 C2 C1 H6 112.179
Br3 C1 H5 106.376 Br3 C1 H6 106.376
Br4 C2 H7 106.376 Br4 C2 H8 106.376
H5 C1 H6 110.338 H7 C2 H8 110.338
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C2)

Jump to S1C1
Energy calculated at G2
 hartrees
Energy at 0K-5223.601572
Energy at 298.15K-5223.595491
HF Energy-5217.844111
Nuclear repulsion energy453.426038
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 HF/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 A 3364 3169 0.05 98.51 0.75 0.86
2 A 3298 3107 25.82 181.63 0.04 0.07
3 A 1626 1532 0.03 6.21 0.75 0.86
4 A 1448 1365 38.56 2.64 0.43 0.60
5 A 1315 1239 2.54 13.08 0.74 0.85
6 A 1111 1047 0.44 4.18 0.72 0.84
7 A 992 935 8.74 6.32 0.46 0.63
8 A 595 560 17.71 26.31 0.09 0.17
9 A 244 230 1.26 1.19 0.29 0.46
10 A 90 85 0.33 1.05 0.71 0.83
11 B 3376 3181 2.79 25.00 0.75 0.86
12 B 3287 3097 2.90 49.79 0.75 0.86
13 B 1615 1521 8.14 16.65 0.75 0.86
14 B 1418 1336 89.69 2.04 0.75 0.86
15 B 1231 1160 2.59 4.71 0.75 0.86
16 B 929 875 17.09 1.23 0.75 0.86
17 B 631 595 23.35 16.23 0.75 0.86
18 B 384 362 9.12 3.23 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 13476.5 cm-1
Scaled (by 0.9422) Zero Point Vibrational Energy (zpe) 12697.6 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 MP2=FULL/6-31G*
ABC
0.24270 0.03254 0.02957

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G*

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.307 0.689 1.216
C2 -0.307 -0.689 1.216
Br3 -0.307 1.747 -0.302
Br4 0.307 -1.747 -0.302
H5 0.007 1.235 2.113
H6 1.393 0.647 1.151
H7 -0.007 -1.235 2.113
H8 -1.393 -0.647 1.151

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 H5 H6 H7 H8
C11.50891.94932.87041.09181.08922.14592.1634
C21.50892.87041.94932.14592.16341.09181.0892
Br31.94932.87043.54752.48852.49223.84873.0033
Br42.87041.94933.54753.84873.00332.48852.4922
H51.09182.14592.48853.84871.78712.46972.5355
H61.08922.16342.49223.00331.78712.53553.0724
H72.14591.09183.84872.48852.46972.53551.7871
H82.16341.08923.00332.49222.53553.07241.7871

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 112.396 C1 C2 H7 109.837
C1 C2 H8 112.025 C2 C1 Br3 112.396
C2 C1 H5 109.837 C2 C1 H6 112.025
Br3 C1 H5 105.817 Br3 C1 H6 106.553
Br4 C2 H7 105.817 Br4 C2 H8 106.553
H5 C1 H6 109.985 H7 C2 H8 109.985
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability