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All results from a given calculation for C2H5Br (Ethyl bromide)

using model chemistry: MP2/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/6-31G(2df,p)
 hartrees
Energy at 0K-2649.216440
Energy at 298.15K 
HF Energy-2648.728872
Nuclear repulsion energy165.884356
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 MP2/6-31G(2df,p)
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' 3202 3024 9.56 66.40 0.71 0.83
2 A' 3153 2978 7.68 79.93 0.11 0.20
3 A' 3108 2936 10.90 114.44 0.04 0.08
4 A' 1528 1443 1.92 7.89 0.74 0.85
5 A' 1512 1428 1.37 10.74 0.75 0.86
6 A' 1430 1350 4.64 2.97 0.71 0.83
7 A' 1305 1233 39.56 1.89 0.36 0.52
8 A' 1101 1040 0.23 4.02 0.26 0.42
9 A' 1001 946 11.09 3.02 0.73 0.85
10 A' 630 595 8.31 15.01 0.20 0.34
11 A' 299 282 1.17 1.67 0.32 0.49
12 A" 3231 3052 7.03 4.19 0.75 0.86
13 A" 3210 3032 0.63 86.63 0.75 0.86
14 A" 1517 1432 8.24 14.30 0.75 0.86
15 A" 1287 1215 0.37 3.78 0.75 0.86
16 A" 1059 1000 0.06 3.08 0.75 0.86
17 A" 783 740 3.85 0.06 0.75 0.86
18 A" 274 258 0.03 0.00 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 14814.5 cm-1
Scaled (by 0.9445) Zero Point Vibrational Energy (zpe) 13992.3 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 MP2/6-31G(2df,p)
ABC
1.00603 0.12993 0.12024

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.575 -2.002 0.000
C2 0.601 -1.044 0.000
Br3 0.000 0.781 0.000
H4 1.224 -1.168 0.884
H5 1.224 -1.168 -0.884
H6 -0.212 -3.032 0.000
H7 -1.196 -1.853 0.883
H8 -1.196 -1.853 -0.883

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.51702.84242.17102.17101.09251.08981.0898
C21.51701.92191.08861.08862.14802.15932.1593
Br32.84241.92192.46592.46593.81973.02483.0248
H42.17101.08862.46591.76852.51352.51453.0736
H52.17101.08862.46591.76852.51353.07362.5145
H61.09252.14803.81972.51352.51351.77201.7720
H71.08982.15933.02482.51453.07361.77201.7667
H81.08982.15933.02483.07362.51451.77201.7667

picture of Ethyl bromide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 Br3 110.939 C1 C2 H4 111.808
C1 C2 H5 111.808 C2 C1 H6 109.731
C2 C1 H7 110.792 C2 C1 H8 110.792
Br3 C2 H4 106.691 Br3 C2 H5 106.691
H4 C2 H5 108.637 H6 C1 H7 108.583
H6 C1 H8 108.583 H7 C1 H8 108.295
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability