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: ROHF/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1Ag
Energy calculated at ROHF/6-31+G**
 hartrees
Energy at 0K-5217.879880
Energy at 298.15K-5217.890275
HF Energy-5217.879880
Nuclear repulsion energy417.854069
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 ROHF/6-31+G**
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 3313 2835 0.00      
2 Ag 1636 1400 0.00      
3 Ag 1448 1240 0.00      
4 Ag 1141 977 0.00      
5 Ag 730 625 0.00      
6 Ag 207 177 0.00      
7 Au 3397 2908 0.30      
8 Au 1233 1055 3.53      
9 Au 824 705 2.75      
10 Au 138 118 6.51      
11 Bg 3375 2889 0.00      
12 Bg 1418 1214 0.00      
13 Bg 1055 903 0.00      
14 Bu 3318 2840 11.24      
15 Bu 1629 1395 8.72      
16 Bu 1358 1162 105.12      
17 Bu 640 547 107.05      
18 Bu 193 165 7.76      

Unscaled Zero Point Vibrational Energy (zpe) 13526.4 cm-1
Scaled (by 0.8559) Zero Point Vibrational Energy (zpe) 11577.3 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 ROHF/6-31+G**
ABC
0.95963 0.01970 0.01944

See section I.F.4 to change rotational constant units
Geometric Data calculated at ROHF/6-31+G**

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.490 0.574 0.000
C2 -0.490 -0.574 0.000
Br3 -0.490 2.264 0.000
Br4 0.490 -2.264 0.000
H5 1.107 0.581 0.882
H6 1.107 0.581 -0.882
H7 -1.107 -0.581 0.882
H8 -1.107 -0.581 -0.882

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 H5 H6 H7 H8
C11.50991.95372.83821.07641.07642.15962.1596
C21.50992.83821.95372.15962.15961.07641.0764
Br31.95372.83824.63302.48212.48213.04213.0421
Br42.83821.95374.63303.04213.04212.48212.4821
H51.07642.15962.48213.04211.76442.50053.0603
H61.07642.15962.48213.04211.76443.06032.5005
H72.15961.07643.04212.48212.50053.06031.7644
H82.15961.07643.04212.48213.06032.50051.7644

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 109.388 C1 C2 H7 112.148
C1 C2 H8 112.148 C2 C1 Br3 109.388
C2 C1 H5 112.148 C2 C1 H6 112.148
Br3 C1 H5 106.371 Br3 C1 H6 106.371
Br4 C2 H7 106.371 Br4 C2 H8 106.371
H5 C1 H6 110.083 H7 C2 H8 110.083
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at ROHF/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.339      
2 C -0.339      
3 Br -0.174      
4 Br -0.174      
5 H 0.256      
6 H 0.256      
7 H 0.256      
8 H 0.256      


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 -49.570 1.805 0.000
y 1.805 -58.259 0.000
z 0.000 0.000 -50.314
Traceless
 xyz
x 4.717 1.805 0.000
y 1.805 -8.317 0.000
z 0.000 0.000 3.600
Polar
3z2-r27.200
x2-y28.689
xy1.805
xz0.000
yz0.000


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


<r2> (average value of r2) Å2
<r2> 424.761
(<r2>)1/2 20.610