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All results from a given calculation for CH2BrI (bromoiodomethane)

using model chemistry: B3LYP/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 B3LYP/3-21G*
 hartrees
Energy at 0K-9491.764136
Energy at 298.15K 
HF Energy-9491.764136
Nuclear repulsion energy458.635564
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 B3LYP/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' 3145 3025 1.08 82.69 0.09 0.16
2 A' 1480 1424 0.13 20.65 0.70 0.82
3 A' 1209 1163 74.65 2.35 0.25 0.40
4 A' 628 604 71.99 6.27 0.75 0.86
5 A' 523 503 8.10 20.65 0.14 0.25
6 A' 138 133 0.03 5.82 0.43 0.60
7 A" 3230 3108 1.13 55.00 0.75 0.86
8 A" 1117 1075 0.04 8.17 0.75 0.86
9 A" 774 744 9.18 2.46 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6122.3 cm-1
Scaled (by 0.962) Zero Point Vibrational Energy (zpe) 5889.6 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 B3LYP/3-21G*
ABC
0.78437 0.02856 0.02770

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.118 0.000
Br2 1.911 0.738 0.000
I3 -1.253 -0.677 0.000
H4 -0.235 1.677 0.901
H5 -0.235 1.677 -0.901

Atom - Atom Distances (Å)
  C1 Br2 I3 H4 H5
C11.94872.18921.08621.0862
Br21.94873.46612.51042.5104
I32.18923.46612.71832.7183
H41.08622.51042.71831.8020
H51.08622.51042.71831.8020

picture of bromoiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Br2 C1 I3 113.660 Br2 C1 H4 108.245
Br2 C1 H5 108.245 I3 C1 H4 107.335
I3 C1 H5 107.335 H4 C1 H5 112.099
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.586      
2 Br -0.020      
3 I 0.063      
4 H 0.271      
5 H 0.271      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.489 1.234 0.000 1.327
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -53.337 -0.211 0.000
y -0.211 -49.750 0.000
z 0.000 0.000 -53.158
Traceless
 xyz
x -1.883 -0.211 0.000
y -0.211 3.498 0.000
z 0.000 0.000 -1.614
Polar
3z2-r2-3.229
x2-y2-3.588
xy-0.211
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 10.211 1.993 0.000
y 1.993 7.249 0.000
z 0.000 0.000 5.347


<r2> (average value of r2) Å2
<r2> 301.786
(<r2>)1/2 17.372