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All results from a given calculation for C2Br4 (tetrabromoethene)

using model chemistry: B2PLYP=FULL/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2H 1AG
Energy calculated at B2PLYP=FULL/cc-pVDZ
 hartrees
Energy at 0K-10370.903258
Energy at 298.15K 
HF Energy-10370.626274
Nuclear repulsion energy1471.768604
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/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 Ag 1580 1514 0.00 40.88 0.28 0.44
2 Ag 270 259 0.00 11.19 0.16 0.27
3 Ag 147 141 0.00 3.22 0.66 0.80
4 Au 57 54 0.00 0.00 0.00 0.00
5 B1u 638 611 32.49 0.00 0.00 0.00
6 B1u 191 183 0.15 0.00 0.00 0.00
7 B2g 473 454 0.00 1.04 0.75 0.86
8 B2u 771 739 120.78 0.00 0.00 0.00
9 B2u 119 114 0.18 0.00 0.00 0.00
10 B3g 891 854 0.00 0.92 0.75 0.86
11 B3g 214 205 0.00 3.10 0.75 0.86
12 B3u 250 239 2.65 0.00 0.00 0.00

Unscaled Zero Point Vibrational Energy (zpe) 2800.1 cm-1
Scaled (by 0.9585) Zero Point Vibrational Energy (zpe) 2683.9 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/cc-pVDZ
ABC
0.02107 0.01829 0.00979

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/cc-pVDZ

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.677
C2 0.000 0.000 -0.677
Br3 0.000 1.592 1.698
Br4 0.000 -1.592 1.698
Br5 0.000 -1.592 -1.698
Br6 0.000 1.592 -1.698

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 Br5 Br6
C11.35331.89181.89182.85942.8594
C21.35332.85942.85941.89181.8918
Br31.89182.85943.18424.65603.3970
Br41.89182.85943.18423.39704.6560
Br52.85941.89184.65603.39703.1842
Br62.85941.89183.39704.65603.1842

picture of tetrabromoethene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 Br5 122.693 C1 C2 Br6 122.693
C2 C1 Br3 122.693 C2 C1 Br4 122.693
Br3 C1 Br4 114.614 Br5 C2 Br6 114.614
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability