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 CBr2 (dibromomethylene)

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 C2V 1A1
2 1 yes C2V 3B1

State 1 (1A1)

Jump to S2C1
Energy calculated at CID/3-21G
 hartrees
Energy at 0K-5157.788828
Energy at 298.15K-5157.793736
HF Energy-5157.625382
Nuclear repulsion energy307.675556
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 A1 538 501 46.25      
2 A1 179 167 0.27      
3 B2 592 552 281.10      

Unscaled Zero Point Vibrational Energy (zpe) 654.9 cm-1
Scaled (by 0.9316) Zero Point Vibrational Energy (zpe) 610.1 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
1.13739 0.03947 0.03814

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.062
Br2 0.000 1.645 -0.091
Br3 0.000 -1.645 -0.091

Atom - Atom Distances (Å)
  C1 Br2 Br3
C12.00882.0088
Br22.00883.2900
Br32.00883.2900

picture of dibromomethylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Br2 C1 Br3 109.954
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

State 2 (3B1)

Jump to S1C1
Energy calculated at CID/3-21G
 hartrees
Energy at 0K-5157.788285
Energy at 298.15K-5157.793213
HF Energy-5157.651301
Nuclear repulsion energy301.108554
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 A1 459 428 3.28      
2 A1 165 154 0.00      
3 B2 821 765 104.12      

Unscaled Zero Point Vibrational Energy (zpe) 722.7 cm-1
Scaled (by 0.9316) Zero Point Vibrational Energy (zpe) 673.3 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
2.28653 0.03505 0.03452

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.749
Br2 0.000 1.746 -0.064
Br3 0.000 -1.746 -0.064

Atom - Atom Distances (Å)
  C1 Br2 Br3
C11.92561.9256
Br21.92563.4910
Br31.92563.4910

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