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

using model chemistry: MP2/CEP-31G

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/CEP-31G
 hartrees
Energy at 0K-27.178948
Energy at 298.15K 
HF Energy-26.985073
Nuclear repulsion energy40.518488
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/CEP-31G
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' 3136 3030 49.24      
2 A' 3103 2999 29.53      
3 A' 3038 2935 36.84      
4 A' 1520 1468 4.35      
5 A' 1496 1446 0.95      
6 A' 1458 1409 4.82      
7 A' 1335 1290 67.19      
8 A' 1091 1054 0.81      
9 A' 998 964 15.06      
10 A' 549 531 13.70      
11 A' 277 268 1.54      
12 A" 3197 3089 41.16      
13 A" 3155 3049 24.87      
14 A" 1504 1453 8.67      
15 A" 1285 1241 1.51      
16 A" 1058 1022 0.66      
17 A" 795 769 8.00      
18 A" 263 255 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 14628.9 cm-1
Scaled (by 0.9663) Zero Point Vibrational Energy (zpe) 14135.9 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 MP2/CEP-31G
ABC
0.95434 0.11801 0.10951

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-31G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.592 -2.095 0.000
C2 0.621 -1.115 0.000
Br3 0.000 0.822 0.000
H4 1.245 -1.224 0.907
H5 1.245 -1.224 -0.907
H6 -0.213 -3.142 0.000
H7 -1.224 -1.949 0.900
H8 -1.224 -1.949 -0.900

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.55922.97632.22622.22621.11331.10921.1092
C21.55922.03411.10621.10622.19162.21572.2157
Br32.97632.03412.56022.56023.96953.16013.1601
H42.22621.10622.56021.81412.57482.57363.1444
H52.22621.10622.56021.81412.57483.14442.5736
H61.11332.19163.96952.57482.57481.80401.8040
H71.10922.21573.16012.57363.14441.80401.7991
H81.10922.21573.16013.14442.57361.80401.7991

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 111.166 C1 C2 H4 112.165
C1 C2 H5 112.165 C2 C1 H6 109.047
C2 C1 H7 111.149 C2 C1 H8 111.149
Br3 C2 H4 105.381 Br3 C2 H5 105.381
H4 C2 H5 110.161 H6 C1 H7 108.521
H6 C1 H8 108.521 H7 C1 H8 108.380
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability