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 CHBr (bromomethylene)

using model chemistry: CID/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
2 1 yes CS 3A"

State 1 (1A')

Jump to S2C1
Energy calculated at CID/3-21G
 hartrees
Energy at 0K-2598.265486
Energy at 298.15K-2598.268157
HF Energy-2598.143414
Nuclear repulsion energy66.059657
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 CID/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' 2832 2638 97.08      
2 A' 1182 1101 8.65      
3 A' 583 543 85.54      

Unscaled Zero Point Vibrational Energy (zpe) 2298.3 cm-1
Scaled (by 0.9316) Zero Point Vibrational Energy (zpe) 2141.1 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 CID/3-21G
ABC
15.15790 0.37220 0.36328

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.026 1.658 0.000
Br2 0.026 -0.337 0.000
H3 -1.078 1.861 0.000

Atom - Atom Distances (Å)
  C1 Br2 H3
C11.99501.1227
Br21.99502.4603
H31.12272.4603

picture of bromomethylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Br2 C1 H3 100.455
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

State 2 (3A")

Jump to S1C1
Energy calculated at CID/3-21G
 hartrees
Energy at 0K-2598.281651
Energy at 298.15K-2598.284318
HF Energy-2598.181081
Nuclear repulsion energy67.626266
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 CID/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' 3214 2994 4.54      
2 A' 903 841 2.32      
3 A' 655 610 19.78      

Unscaled Zero Point Vibrational Energy (zpe) 2386.0 cm-1
Scaled (by 0.9316) Zero Point Vibrational Energy (zpe) 2222.8 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 CID/3-21G
ABC
25.16651 0.38464 0.37885

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.021 1.585 0.000
Br2 0.021 -0.335 0.000
H3 -0.855 2.228 0.000

Atom - Atom Distances (Å)
  C1 Br2 H3
C11.92041.0865
Br21.92042.7090
H31.08652.7090

picture of bromomethylene state 2 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability