return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: MP2/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/6-311G*
 hartrees
Energy at 0K-2651.437563
Energy at 298.15K-2651.445885
HF Energy-2651.033642
Nuclear repulsion energy164.135525
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 MP2/6-311G*
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' 3170 3012 17.32      
2 A' 3137 2981 11.74      
3 A' 3081 2928 16.81      
4 A' 1538 1462 3.94      
5 A' 1524 1448 1.97      
6 A' 1451 1379 8.85      
7 A' 1332 1266 52.43      
8 A' 1110 1055 0.29      
9 A' 1004 954 13.34      
10 A' 603 573 11.46      
11 A' 298 283 1.52      
12 A" 3211 3052 13.03      
13 A" 3186 3027 4.15      
14 A" 1527 1451 11.58      
15 A" 1301 1236 1.04      
16 A" 1077 1024 0.58      
17 A" 792 753 5.21      
18 A" 284 270 0.01      

Unscaled Zero Point Vibrational Energy (zpe) 14813.4 cm-1
Scaled (by 0.9503) Zero Point Vibrational Energy (zpe) 14077.2 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 MP2/6-311G*
ABC
1.00584 0.12652 0.11734

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.575 -2.025 0.000
C2 0.601 -1.068 0.000
Br3 0.000 0.792 0.000
H4 1.220 -1.179 0.889
H5 1.220 -1.179 -0.889
H6 -0.205 -3.055 0.000
H7 -1.196 -1.881 0.885
H8 -1.196 -1.881 -0.885

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.51612.87542.17472.17471.09471.09101.0910
C21.51611.95531.08921.08922.14422.16192.1619
Br32.87541.95532.48312.48313.85303.05923.0592
H42.17471.08922.48311.77872.51842.51623.0790
H52.17471.08922.48311.77872.51843.07902.5162
H61.09472.14423.85302.51842.51841.77371.7737
H71.09102.16193.05922.51623.07901.77371.7704
H81.09102.16193.05923.07902.51621.77371.7704

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 111.217 C1 C2 H4 112.135
C1 C2 H5 112.135 C2 C1 H6 109.365
C2 C1 H7 110.990 C2 C1 H8 110.990
Br3 C2 H4 105.748 Br3 C2 H5 105.748
H4 C2 H5 109.476 H6 C1 H7 108.483
H6 C1 H8 108.483 H7 C1 H8 108.457
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability