return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: B2PLYP=FULL/6-311G*

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 B2PLYP=FULL/6-311G*
 hartrees
Energy at 0K-5226.153762
Energy at 298.15K 
HF Energy-5225.736679
Nuclear repulsion energy415.649655
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 B2PLYP=FULL/6-311G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 Ag 3140 3140 0.00 148.07 0.07 0.14
2 Ag 1517 1517 0.00 13.98 0.72 0.84
3 Ag 1326 1326 0.00 34.08 0.51 0.68
4 Ag 1080 1080 0.00 15.73 0.67 0.80
5 Ag 675 675 0.00 95.19 0.28 0.44
6 Ag 191 191 0.00 4.69 0.35 0.51
7 Au 3224 3224 2.13 0.00 0.65 0.79
8 Au 1138 1138 5.84 0.00 0.70 0.82
9 Au 774 774 5.60 0.00 0.00 0.00
10 Au 108 108 4.49 0.00 0.00 0.00
11 Bg 3202 3202 0.00 93.30 0.75 0.86
12 Bg 1319 1319 0.00 4.43 0.75 0.86
13 Bg 973 973 0.00 6.75 0.75 0.86
14 Bu 3148 3148 9.72 0.00 0.00 0.00
15 Bu 1514 1514 8.25 0.00 0.00 0.00
16 Bu 1247 1247 64.76 0.00 0.00 0.00
17 Bu 599 599 71.46 0.00 0.00 0.00
18 Bu 183 183 6.97 0.00 0.00 0.00

Unscaled Zero Point Vibrational Energy (zpe) 12679.0 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12679.0 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 B2PLYP=FULL/6-311G*
ABC
0.94846 0.01952 0.01926

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/6-311G*

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.494 0.570 0.000
C2 -0.494 -0.570 0.000
Br3 -0.494 2.275 0.000
Br4 0.494 -2.275 0.000
H5 1.116 0.574 0.890
H6 1.116 0.574 -0.890
H7 -1.116 -0.574 0.890
H8 -1.116 -0.574 -0.890

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 H5 H6 H7 H8
C11.50851.96972.84481.08561.08562.16592.1659
C21.50852.84481.96972.16592.16591.08561.0856
Br31.96972.84484.65512.50472.50473.04853.0485
Br42.84481.96974.65513.04853.04852.50472.5047
H51.08562.16592.50473.04851.77942.50953.0764
H61.08562.16592.50473.04851.77943.07642.5095
H72.16591.08563.04852.50472.50953.07641.7794
H82.16591.08563.04852.50473.07642.50951.7794

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 109.033 C1 C2 H7 112.191
C1 C2 H8 112.191 C2 C1 Br3 109.033
C2 C1 H5 112.191 C2 C1 H6 112.191
Br3 C1 H5 106.512 Br3 C1 H6 106.512
Br4 C2 H7 106.512 Br4 C2 H8 106.512
H5 C1 H6 110.076 H7 C2 H8 110.076
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C2)

Jump to S1C1
Energy calculated at B2PLYP=FULL/6-311G*
 hartrees
Energy at 0K-5226.149813
Energy at 298.15K 
HF Energy-5225.732488
Nuclear repulsion energy448.954449
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 B2PLYP=FULL/6-311G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A 3181 3181 0.15 102.22 0.75 0.86
2 A 3120 3120 19.96 216.91 0.02 0.04
3 A 1500 1500 0.76 4.68 0.63 0.77
4 A 1345 1345 26.26 4.04 0.63 0.77
5 A 1223 1223 3.21 14.56 0.75 0.86
6 A 1053 1053 0.32 2.64 0.68 0.81
7 A 928 928 9.01 8.63 0.44 0.61
8 A 561 561 8.75 17.65 0.08 0.15
9 A 233 233 1.11 1.71 0.48 0.64
10 A 81 81 0.23 1.47 0.73 0.84
11 B 3194 3194 3.16 28.13 0.75 0.86
12 B 3111 3111 2.92 53.40 0.75 0.86
13 B 1494 1494 12.92 14.47 0.75 0.86
14 B 1317 1317 71.92 1.91 0.75 0.86
15 B 1151 1151 4.13 5.82 0.75 0.86
16 B 867 867 21.44 1.55 0.75 0.86
17 B 597 597 16.16 11.46 0.75 0.86
18 B 361 361 6.46 2.82 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12656.8 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12656.8 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 B2PLYP=FULL/6-311G*
ABC
0.25393 0.03024 0.02780

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/6-311G*

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.311 0.688 1.181
C2 -0.311 -0.688 1.181
Br3 -0.311 1.816 -0.294
Br4 0.311 -1.816 -0.294
H5 0.030 1.212 2.094
H6 1.394 0.645 1.106
H7 -0.030 -1.212 2.094
H8 -1.394 -0.645 1.106

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 H5 H6 H7 H8
C11.51061.95822.90671.08931.08642.13562.1659
C21.51062.90671.95822.13562.16591.08931.0864
Br31.95822.90673.68582.48652.49733.86683.0319
Br42.90671.95823.68583.86683.03192.48652.4973
H51.08932.13562.48653.86681.77712.42492.5406
H61.08642.16592.49733.03191.77712.54063.0722
H72.13561.08933.86682.48652.42492.54061.7771
H82.16591.08643.03192.49732.54063.07221.7771

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 113.221 C1 C2 H7 109.388
C1 C2 H8 111.993 C2 C1 Br3 113.221
C2 C1 H5 109.388 C2 C1 H6 111.993
Br3 C1 H5 105.795 Br3 C1 H6 106.681
Br4 C2 H7 105.795 Br4 C2 H8 106.681
H5 C1 H6 109.525 H7 C2 H8 109.525
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability