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All results from a given calculation for CBr2 (dibromomethylene)

using model chemistry: QCISD(T)=FULL/6-31G*

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 QCISD(T)=FULL/6-31G*
 hartrees
Energy at 0K-5177.967058
Energy at 298.15K-5177.972024
HF Energy-5177.522155
Nuclear repulsion energy322.832795
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 QCISD(T)=FULL/6-31G*
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 584 584        
2 A1 196 196        
3 B2 609 609        

Unscaled Zero Point Vibrational Energy (zpe) 694.9 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 694.9 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 QCISD(T)=FULL/6-31G*
ABC
1.21620 0.04363 0.04212

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)=FULL/6-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.027
Br2 0.000 1.565 -0.088
Br3 0.000 -1.565 -0.088

Atom - Atom Distances (Å)
  C1 Br2 Br3
C11.92121.9212
Br21.92123.1293
Br31.92123.1293

picture of dibromomethylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Br2 C1 Br3 109.058
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

State 2 (3B1)

Jump to S1C1
Energy calculated at QCISD(T)=FULL/6-31G*
 hartrees
Energy at 0K-5177.942668
Energy at 298.15K-5177.947682
HF Energy-5177.539325
Nuclear repulsion energy315.252075
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 QCISD(T)=FULL/6-31G*
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 533 533        
2 A1 184 184        
3 B2 843 843        

Unscaled Zero Point Vibrational Energy (zpe) 780.1 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 780.1 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 QCISD(T)=FULL/6-31G*
ABC
2.24393 0.03875 0.03810

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)=FULL/6-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.756
Br2 0.000 1.660 -0.065
Br3 0.000 -1.660 -0.065

Atom - Atom Distances (Å)
  C1 Br2 Br3
C11.85191.8519
Br21.85193.3202
Br31.85193.3202

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