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: B2PLYP=FULL/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 B2PLYP=FULL/3-21G*
 hartrees
Energy at 0K-9490.538691
Energy at 298.15K 
HF Energy-9490.416458
Nuclear repulsion energy459.719483
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 B2PLYP=FULL/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' 3166 3166 0.86 79.79 0.09 0.17
2 A' 1501 1501 0.20 20.14 0.70 0.82
3 A' 1226 1226 77.16 2.26 0.24 0.39
4 A' 642 642 62.98 7.32 0.75 0.86
5 A' 531 531 6.55 20.03 0.14 0.25
6 A' 141 141 0.04 5.27 0.43 0.60
7 A" 3252 3252 1.45 54.07 0.75 0.86
8 A" 1131 1131 0.03 8.41 0.75 0.86
9 A" 787 787 8.46 2.46 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6188.4 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 6188.4 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 B2PLYP=FULL/3-21G*
ABC
0.77706 0.02876 0.02788

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.123 0.000
Br2 1.907 0.728 0.000
I3 -1.251 -0.672 0.000
H4 -0.233 1.682 0.900
H5 -0.233 1.682 -0.900

Atom - Atom Distances (Å)
  C1 Br2 I3 H4 H5
C11.94762.18761.08481.0848
Br21.94763.45412.50982.5098
I32.18763.45412.71762.7176
H41.08482.50982.71761.8009
H51.08482.50982.71761.8009

picture of bromoiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Br2 C1 I3 113.162 Br2 C1 H4 108.327
Br2 C1 H5 108.327 I3 C1 H4 107.445
I3 C1 H5 107.445 H4 C1 H5 112.207
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability