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All results from a given calculation for CH2BrI (bromoiodomethane)

using model chemistry: PBE1PBE/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 PBE1PBE/3-21G*
 hartrees
Energy at 0K-9490.969455
Energy at 298.15K 
HF Energy-9490.969455
Nuclear repulsion energy463.887190
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 PBE1PBE/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' 3155 3028 0.46 82.11 0.08 0.16
2 A' 1479 1419 0.37 19.48 0.70 0.82
3 A' 1219 1170 61.83 2.54 0.26 0.42
4 A' 665 639 63.01 6.18 0.74 0.85
5 A' 548 526 5.58 18.91 0.13 0.24
6 A' 142 136 0.04 5.17 0.43 0.60
7 A" 3242 3112 2.56 54.52 0.75 0.86
8 A" 1131 1085 0.06 8.22 0.75 0.86
9 A" 782 750 10.12 2.24 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6181.4 cm-1
Scaled (by 0.9598) Zero Point Vibrational Energy (zpe) 5932.9 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 PBE1PBE/3-21G*
ABC
0.78972 0.02929 0.02840

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.111 0.000
Br2 1.890 0.720 0.000
I3 -1.239 -0.664 0.000
H4 -0.234 1.674 0.901
H5 -0.234 1.674 -0.901

Atom - Atom Distances (Å)
  C1 Br2 I3 H4 H5
C11.93012.16501.08811.0881
Br21.93013.42212.49722.4972
I32.16503.42212.69992.6999
H41.08812.49722.69991.8020
H51.08812.49722.69991.8020

picture of bromoiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Br2 C1 I3 113.246 Br2 C1 H4 108.407
Br2 C1 H5 108.407 I3 C1 H4 107.522
I3 C1 H5 107.522 H4 C1 H5 111.793
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.661      
2 Br -0.012      
3 I 0.075      
4 H 0.299      
5 H 0.299      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.500 1.256 0.000 1.352
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -53.347 -0.221 0.000
y -0.221 -49.668 0.000
z 0.000 0.000 -53.146
Traceless
 xyz
x -1.941 -0.221 0.000
y -0.221 3.579 0.000
z 0.000 0.000 -1.638
Polar
3z2-r2-3.277
x2-y2-3.680
xy-0.221
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 9.984 1.857 0.000
y 1.857 7.164 0.000
z 0.000 0.000 5.361


<r2> (average value of r2) Å2
<r2> 295.255
(<r2>)1/2 17.183