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All results from a given calculation for CH2Br (bromomethyl radical)

using model chemistry: QCISD/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A'
1 2 no C2V 2A1

Conformer 1 (CS)

Jump to S1C2
Energy calculated at QCISD/cc-pVDZ
 hartrees
Energy at 0K-2611.643428
Energy at 298.15K-2611.647301
HF Energy-2611.367876
Nuclear repulsion energy80.077056
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/cc-pVDZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3189 3060 6.47      
2 A' 1395 1338 21.61      
3 A' 712 683 16.65      
4 A' 322 309 58.16      
5 A" 3340 3204 0.02      
6 A" 933 895 0.82      

Unscaled Zero Point Vibrational Energy (zpe) 4944.9 cm-1
Scaled (by 0.9594) Zero Point Vibrational Energy (zpe) 4744.1 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/cc-pVDZ
ABC
8.91793 0.37267 0.35825

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.007 1.496 0.000
Br2 -0.007 -0.371 0.000
H3 0.142 1.998 0.959
H4 0.142 1.998 -0.959

Atom - Atom Distances (Å)
  C1 Br2 H3 H4
C11.86711.09261.0926
Br21.86712.55972.5597
H31.09262.55971.9189
H41.09262.55971.9189

picture of bromomethyl radical state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Br2 C1 H3 117.310 Br2 C1 H4 117.310
H3 C1 H4 122.826
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C2V)

Jump to S1C1
Energy calculated at QCISD/cc-pVDZ
 hartrees
Energy at 0K-2611.643366
Energy at 298.15K 
HF Energy-2611.367668
Nuclear repulsion energy80.132570
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/cc-pVDZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 3198 3068 4.98      
2 A1 1394 1337 22.78      
3 A1 714 685 15.38      
4 B1 232i 222i 67.64      
5 B2 3352 3216 0.22      
6 B2 925 888 0.92      

Unscaled Zero Point Vibrational Energy (zpe) 4675.5 cm-1
Scaled (by 0.9594) Zero Point Vibrational Energy (zpe) 4485.6 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/cc-pVDZ
ABC
9.00676 0.37321 0.35837

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/cc-pVDZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.494
Br2 0.000 0.000 0.371
H3 0.000 0.964 -2.007
H4 0.000 -0.964 -2.007

Atom - Atom Distances (Å)
  C1 Br2 H3 H4
C11.86451.09161.0916
Br21.86452.56532.5653
H31.09162.56531.9272
H41.09162.56531.9272

picture of bromomethyl radical state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Br2 C1 H3 118.027 Br2 C1 H4 118.027
H3 C1 H4 123.947
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability