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 CHBrCHBr (Ethene, 1,2-dibromo-, (Z)-)

using model chemistry: HF/daug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A1
Energy calculated at HF/daug-cc-pVTZ
 hartrees
Energy at 0K-5221.819673
Energy at 298.15K-5221.827477
HF Energy-5221.819673
Nuclear repulsion energy427.720588
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/daug-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 A1 3380 3058 0.32      
2 A1 1782 1612 32.60      
3 A1 1290 1167 2.97      
4 A1 619 560 8.96      
5 A1 117 106 0.09      
6 A2 1050 950 0.00      
7 A2 420 380 0.00      
8 B1 773 700 60.10      
9 B2 3355 3035 18.21      
10 B2 1404 1270 64.92      
11 B2 818 740 60.94      
12 B2 507 459 3.64      

Unscaled Zero Point Vibrational Energy (zpe) 7758.1 cm-1
Scaled (by 0.9046) Zero Point Vibrational Energy (zpe) 7018.0 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 HF/daug-cc-pVTZ
ABC
0.29437 0.03320 0.02983

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/daug-cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.654 1.234
C2 0.000 -0.654 1.234
Br3 0.000 1.770 -0.273
Br4 0.000 -1.770 -0.273
H5 0.000 1.190 2.160
H6 0.000 -1.190 2.160

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 H5 H6
C11.30781.87562.85451.06992.0634
C21.30782.85451.87562.06341.0699
Br31.87562.85453.54072.50133.8319
Br42.85451.87563.54073.83192.5013
H51.06992.06342.50133.83192.3800
H62.06341.06993.83192.50132.3800

picture of Ethene, 1,2-dibromo-, (Z)- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 Br4 126.531 C1 C2 H6 120.069
C2 C1 Br3 126.531 C2 C1 H5 120.069
Br3 C1 H5 113.400 Br4 C2 H6 113.400
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/daug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.633      
2 C -0.633      
3 Br 0.079      
4 Br 0.079      
5 H 0.554      
6 H 0.554      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 1.968 1.968
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -50.876 0.000 0.000
y 0.000 -49.747 0.000
z 0.000 0.000 -42.922
Traceless
 xyz
x -4.542 0.000 0.000
y 0.000 -2.848 0.000
z 0.000 0.000 7.389
Polar
3z2-r214.779
x2-y2-1.129
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.106 0.000 0.000
y 0.000 13.000 0.000
z 0.000 0.000 9.346


<r2> (average value of r2) Å2
<r2> 290.064
(<r2>)1/2 17.031