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

using model chemistry: QCISD(T)/aug-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(T)/aug-cc-pVDZ
 hartrees
Energy at 0K-2611.673723
Energy at 298.15K-2611.677375
HF Energy-2611.372663
Nuclear repulsion energy79.970624
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)/aug-cc-pVDZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3168 3097        
2 A' 1386 1356        
3 A' 701 686        
4 A' 163 159        
5 A" 3323 3250        
6 A" 923 902        

Unscaled Zero Point Vibrational Energy (zpe) 4832.1 cm-1
Scaled (by 0.9778) Zero Point Vibrational Energy (zpe) 4724.8 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)/aug-cc-pVDZ
ABC
8.94299 0.37165 0.35698

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.004 1.499 0.000
Br2 -0.004 -0.371 0.000
H3 0.078 2.002 0.964
H4 0.078 2.002 -0.964

Atom - Atom Distances (Å)
  C1 Br2 H3 H4
C11.87011.09091.0909
Br21.87012.56322.5632
H31.09092.56321.9287
H41.09092.56321.9287

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 117.483 Br2 C1 H4 117.483
H3 C1 H4 124.260
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C2V)

Jump to S1C1
Energy calculated at QCISD(T)/aug-cc-pVDZ
 hartrees
Energy at 0K-2611.673716
Energy at 298.15K 
HF Energy-2611.372605
Nuclear repulsion energy79.977450
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)/aug-cc-pVDZ
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 3171 3100        
2 A1 1387 1356        
3 A1 702 686        
4 B1 130i 127i        
5 B2 3328 3254        
6 B2 920 900        

Unscaled Zero Point Vibrational Energy (zpe) 4688.4 cm-1
Scaled (by 0.9778) Zero Point Vibrational Energy (zpe) 4584.3 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 QCISD(T)/aug-cc-pVDZ
ABC
8.97143 0.37171 0.35692

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.498
Br2 0.000 0.000 0.371
H3 0.000 0.966 -2.005
H4 0.000 -0.966 -2.005

Atom - Atom Distances (Å)
  C1 Br2 H3 H4
C11.86961.09051.0905
Br21.86962.56522.5652
H31.09052.56521.9310
H41.09052.56521.9310

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 117.705 Br2 C1 H4 117.705
H3 C1 H4 124.591
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability