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All results from a given calculation for CHBr3 (bromoform)

using model chemistry: QCISD/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at QCISD/3-21G*
 hartrees
Energy at 0K-7719.540216
Energy at 298.15K-7719.549996
HF Energy-7719.021204
Nuclear repulsion energy801.368675
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/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 3180 3056 0.64      
2 A1 548 527 1.26      
3 A1 219 210 0.02      
4 E 1210 1163 28.62      
4 E 1210 1163 28.62      
5 E 694 667 66.58      
5 E 694 667 66.58      
6 E 153 147 0.06      
6 E 153 147 0.06      

Unscaled Zero Point Vibrational Energy (zpe) 4030.8 cm-1
Scaled (by 0.9611) Zero Point Vibrational Energy (zpe) 3874.0 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/3-21G*
ABC
0.04072 0.04072 0.02071

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.563
H2 0.000 0.000 1.651
Br3 0.000 1.854 -0.048
Br4 1.606 -0.927 -0.048
Br5 -1.606 -0.927 -0.048

Atom - Atom Distances (Å)
  C1 H2 Br3 Br4 Br5
C11.08811.95221.95221.9522
H21.08812.51502.51502.5150
Br31.95222.51503.21133.2113
Br41.95222.51503.21133.2113
Br51.95222.51503.21133.2113

picture of bromoform state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 Br3 108.247 H2 C1 Br4 108.247
H2 C1 Br5 108.247 Br3 C1 Br4 110.667
Br3 C1 Br5 110.667 Br4 C1 Br5 110.667
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability