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: LSDA/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1Ag
Energy calculated at LSDA/cc-pVTZ
 hartrees
Energy at 0K-5221.007037
Energy at 298.15K 
HF Energy-5221.007037
Nuclear repulsion energy422.670609
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 LSDA/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 Ag 3024 2991 0.00      
2 Ag 1411 1396 0.00      
3 Ag 1214 1200 0.00      
4 Ag 1093 1082 0.00      
5 Ag 668 661 0.00      
6 Ag 190 188 0.00      
7 Au 3108 3074 0.62      
8 Au 1050 1039 3.76      
9 Au 737 729 5.86      
10 Au 107 105 4.02      
11 Bg 3084 3050 0.00      
12 Bg 1231 1217 0.00      
13 Bg 904 895 0.00      
14 Bu 3035 3002 2.24      
15 Bu 1407 1392 12.28      
16 Bu 1142 1130 32.46      
17 Bu 613 606 65.03      
18 Bu 174 172 7.25      

Unscaled Zero Point Vibrational Energy (zpe) 12095.7 cm-1
Scaled (by 0.9891) Zero Point Vibrational Energy (zpe) 11963.9 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 LSDA/cc-pVTZ
ABC
0.95343 0.02029 0.02002

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

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.489 0.559 0.000
C2 -0.489 -0.559 0.000
Br3 -0.489 2.230 0.000
Br4 0.489 -2.230 0.000
H5 1.121 0.558 0.896
H6 1.121 0.558 -0.896
H7 -1.121 -0.558 0.896
H8 -1.121 -0.558 -0.896

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 H5 H6 H7 H8
C11.48571.93622.78841.09591.09592.15472.1547
C21.48572.78841.93622.15472.15471.09591.0959
Br31.93622.78844.56522.48732.48732.99562.9956
Br42.78841.93624.56522.99562.99562.48732.4873
H51.09592.15472.48732.99561.79182.50403.0790
H61.09592.15472.48732.99561.79183.07902.5040
H72.15471.09592.99562.48732.50403.07901.7918
H82.15471.09592.99562.48733.07902.50401.7918

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 108.428 C1 C2 H7 112.280
C1 C2 H8 112.280 C2 C1 Br3 108.428
C2 C1 H5 112.280 C2 C1 H6 112.280
Br3 C1 H5 106.945 Br3 C1 H6 106.945
Br4 C2 H7 106.945 Br4 C2 H8 106.945
H5 C1 H6 109.671 H7 C2 H8 109.671
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at LSDA/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.250      
2 C -0.250      
3 Br -0.081      
4 Br -0.081      
5 H 0.165      
6 H 0.165      
7 H 0.165      
8 H 0.165      


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 0.000 0.000
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -48.988 1.197 0.000
y 1.197 -55.342 0.000
z 0.000 0.000 -49.577
Traceless
 xyz
x 3.471 1.197 0.000
y 1.197 -6.060 0.000
z 0.000 0.000 2.589
Polar
3z2-r25.177
x2-y26.354
xy1.197
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.903 -1.870 0.000
y -1.870 14.104 0.000
z 0.000 0.000 6.733


<r2> (average value of r2) Å2
<r2> 412.858
(<r2>)1/2 20.319