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All results from a given calculation for C2H3Br (vinyl bromide)

using model chemistry: QCISD/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at QCISD/3-21G
 hartrees
Energy at 0K-2637.322959
Energy at 298.15K-2637.328515
HF Energy-2637.075333
Nuclear repulsion energy141.015553
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/3-21G
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' 3229 3130 8.31      
2 A' 3212 3113 1.15      
3 A' 3138 3041 1.37      
4 A' 1665 1614 25.06      
5 A' 1480 1434 11.54      
6 A' 1319 1279 33.35      
7 A' 1077 1043 4.64      
8 A' 584 566 13.41      
9 A' 346 335 0.13      
10 A" 1010 979 50.21      
11 A" 985 954 26.71      
12 A" 610 591 14.83      

Unscaled Zero Point Vibrational Energy (zpe) 9327.5 cm-1
Scaled (by 0.9692) Zero Point Vibrational Energy (zpe) 9040.2 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 QCISD/3-21G
ABC
1.80599 0.13067 0.12185

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.464 -1.155 0.000
C2 -0.445 -2.132 0.000
Br3 0.000 0.747 0.000
H4 1.535 -1.328 0.000
H5 -0.136 -3.176 0.000
H6 -1.513 -1.929 0.000

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6
C11.33421.95801.08472.10852.1235
C21.33422.91302.13701.08941.0875
Br31.95802.91302.58093.92593.0743
H41.08472.13702.58092.49213.1071
H52.10851.08943.92592.49211.8583
H62.12351.08753.07433.10711.8583

picture of vinyl bromide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 120.578 C1 C2 H6 122.202
C2 C1 Br3 123.338 C2 C1 H4 123.798
Br3 C1 H4 112.864 H5 C2 H6 117.220
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability