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

using model chemistry: QCISD/6-31G*

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/6-31G*
 hartrees
Energy at 0K-2609.112260
Energy at 298.15K-2609.116158
HF Energy-2608.866596
Nuclear repulsion energy79.891667
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/6-31G*
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' 3211 3058 6.47      
2 A' 1429 1361 23.46      
3 A' 690 657 17.89      
4 A' 357 340 62.99      
5 A" 3359 3199 0.07      
6 A" 953 907 1.07      

Unscaled Zero Point Vibrational Energy (zpe) 4999.5 cm-1
Scaled (by 0.9523) Zero Point Vibrational Energy (zpe) 4761.0 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/6-31G*
ABC
9.03952 0.37014 0.35620

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.007 1.504 0.000
Br2 -0.007 -0.372 0.000
H3 0.153 1.994 0.951
H4 0.153 1.994 -0.951

Atom - Atom Distances (Å)
  C1 Br2 H3 H4
C11.87561.08221.0822
Br21.87562.55512.5551
H31.08222.55511.9025
H41.08222.55511.9025

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 116.947 Br2 C1 H4 116.947
H3 C1 H4 123.047
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C2V)

Jump to S1C1
Energy calculated at QCISD/6-31G*
 hartrees
Energy at 0K-2609.112167
Energy at 298.15K 
HF Energy-2608.866330
Nuclear repulsion energy79.968429
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/6-31G*
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 3221 3067 4.77      
2 A1 1427 1359 25.04      
3 A1 693 660 16.09      
4 B1 260i 248i 77.56      
5 B2 3373 3212 0.01      
6 B2 943 898 1.23      

Unscaled Zero Point Vibrational Energy (zpe) 4698.0 cm-1
Scaled (by 0.9523) Zero Point Vibrational Energy (zpe) 4473.9 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/6-31G*
ABC
9.14946 0.37090 0.35645

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.500
Br2 0.000 0.000 0.372
H3 0.000 0.956 -2.005
H4 0.000 -0.956 -2.005

Atom - Atom Distances (Å)
  C1 Br2 H3 H4
C11.87211.08121.0812
Br21.87212.56202.5620
H31.08122.56201.9122
H41.08122.56201.9122

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 117.835 Br2 C1 H4 117.835
H3 C1 H4 124.330
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability