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All results from a given calculation for CHBrCHBr (Ethene, 1,2-dibromo-, (Z)-)

using model chemistry: mPW1PW91/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A1
Energy calculated at mPW1PW91/3-21G*
 hartrees
Energy at 0K-5201.348037
Energy at 298.15K-5201.355752
HF Energy-5201.348037
Nuclear repulsion energy434.413346
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 mPW1PW91/3-21G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3267 3102 0.32      
2 A1 1659 1575 30.77      
3 A1 1219 1157 0.87      
4 A1 630 598 8.45      
5 A1 113 107 0.01      
6 A2 961 912 0.00      
7 A2 401 381 0.00      
8 B1 723 686 86.30      
9 B2 3242 3078 13.74      
10 B2 1340 1273 28.71      
11 B2 796 755 57.74      
12 B2 493 468 1.42      

Unscaled Zero Point Vibrational Energy (zpe) 7420.4 cm-1
Scaled (by 0.9496) Zero Point Vibrational Energy (zpe) 7046.4 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 mPW1PW91/3-21G*
ABC
0.27717 0.03556 0.03152

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/3-21G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.663 1.276
C2 0.000 -0.663 1.276
Br3 0.000 1.708 -0.281
Br4 0.000 -1.708 -0.281
H5 0.000 1.233 2.196
H6 0.000 -1.233 2.196

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 H5 H6
C11.32671.87532.83701.08182.1073
C21.32672.83701.87532.10731.0818
Br31.87532.83703.41582.52263.8450
Br42.83701.87533.41583.84502.5226
H51.08182.10732.52263.84502.4651
H62.10731.08183.84502.52262.4651

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 123.849 C1 C2 H6 121.746
C2 C1 Br3 123.849 C2 C1 H5 121.746
Br3 C1 H5 114.405 Br4 C2 H6 114.405
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.282      
2 C -0.282      
3 Br 0.009      
4 Br 0.009      
5 H 0.273      
6 H 0.273      


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 1.520 1.520
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -49.768 0.000 0.000
y 0.000 -46.870 0.000
z 0.000 0.000 -41.175
Traceless
 xyz
x -5.746 0.000 0.000
y 0.000 -1.398 0.000
z 0.000 0.000 7.144
Polar
3z2-r214.289
x2-y2-2.898
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.532 0.000 0.000
y 0.000 10.167 0.000
z 0.000 0.000 7.347


<r2> (average value of r2) Å2
<r2> 275.922
(<r2>)1/2 16.611