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 CH2BrI (bromoiodomethane)

using model chemistry: B1B95/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B1B95/STO-3G
 hartrees
Energy at 0K-9438.974371
Energy at 298.15K 
HF Energy-9438.974371
Nuclear repulsion energy461.116224
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 B1B95/STO-3G
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' 3376 2981 0.34 42.45 0.12 0.22
2 A' 1626 1436 0.12 17.39 0.71 0.83
3 A' 1331 1176 67.35 2.40 0.71 0.83
4 A' 773 682 63.49 7.20 0.75 0.86
5 A' 592 523 10.29 13.75 0.18 0.31
6 A' 161 142 0.51 4.77 0.53 0.69
7 A" 3498 3089 0.00 33.41 0.75 0.86
8 A" 1247 1101 0.00 13.65 0.75 0.86
9 A" 841 743 0.42 2.39 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6722.6 cm-1
Scaled (by 0.883) Zero Point Vibrational Energy (zpe) 5936.0 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 B1B95/STO-3G
ABC
0.86578 0.02850 0.02774

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/STO-3G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.052 0.000
Br2 1.900 0.775 0.000
I3 -1.245 -0.692 0.000
H4 -0.263 1.641 0.890
H5 -0.263 1.641 -0.890

Atom - Atom Distances (Å)
  C1 Br2 I3 H4 H5
C11.92012.14271.09971.0997
Br21.92013.47012.49462.4946
I32.14273.47012.68362.6836
H41.09972.49462.68361.7802
H51.09972.49462.68361.7802

picture of bromoiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Br2 C1 I3 117.219 Br2 C1 H4 108.319
Br2 C1 H5 108.319 I3 C1 H4 107.296
I3 C1 H5 107.296 H4 C1 H5 108.082
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.279      
2 Br 0.015      
3 I 0.032      
4 H 0.116      
5 H 0.116      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.348 1.460 0.000 1.501
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -51.452 -1.270 0.000
y -1.270 -47.679 0.000
z 0.000 0.000 -48.928
Traceless
 xyz
x -3.149 -1.270 0.000
y -1.270 2.511 0.000
z 0.000 0.000 0.638
Polar
3z2-r21.276
x2-y2-3.773
xy-1.270
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.868 1.650 0.000
y 1.650 2.935 0.000
z 0.000 0.000 1.033


<r2> (average value of r2) Å2
<r2> 299.448
(<r2>)1/2 17.305