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All results from a given calculation for CH3Br (methyl bromide)

using model chemistry: MP2=FULL/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at MP2=FULL/cc-pVDZ
 hartrees
Energy at 0K-2612.290376
Energy at 298.15K 
HF Energy-2612.000324
Nuclear repulsion energy89.129840
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 MP2=FULL/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 3129 2974 18.34      
2 A1 1347 1280 23.29      
3 A1 649 617 9.33      
4 E 3258 3096 2.01      
4 E 3258 3096 2.01      
5 E 1481 1408 5.26      
5 E 1481 1408 5.26      
6 E 978 929 5.41      
6 E 978 929 5.41      

Unscaled Zero Point Vibrational Energy (zpe) 8279.1 cm-1
Scaled (by 0.9504) Zero Point Vibrational Energy (zpe) 7868.4 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 MP2=FULL/cc-pVDZ
ABC
5.14568 0.31999 0.31999

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/cc-pVDZ

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.517
Br2 0.000 0.000 0.420
H3 0.000 1.041 -1.861
H4 0.901 -0.520 -1.861
H5 -0.901 -0.520 -1.861

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.93601.09651.09651.0965
Br21.93602.50712.50712.5071
H31.09652.50711.80301.8030
H41.09652.50711.80301.8030
H51.09652.50711.80301.8030

picture of methyl bromide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Br2 C1 H3 108.323 Br2 C1 H4 108.323
Br2 C1 H5 108.323 H3 C1 H4 110.595
H3 C1 H5 110.595 H4 C1 H5 110.595
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability