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: CBS-Q

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at CBS-Q
 hartrees
Energy at 0K-2651.916188
Energy at 298.15K-2651.911079
HF Energy-2648.624209
Nuclear repulsion energy164.297720
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 CBS-Q
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3279 3279 41.15 71.16 0.06 0.11
2 A' 3262 3262 5.15 115.64 0.54 0.70
3 A' 3191 3191 27.55 127.00 0.08 0.14
4 A' 1633 1633 1.43 8.62 0.74 0.85
5 A' 1625 1625 1.71 15.05 0.75 0.85
6 A' 1550 1550 2.59 4.10 0.73 0.85
7 A' 1410 1410 78.56 2.61 0.65 0.79
8 A' 1165 1165 0.86 5.50 0.32 0.48
9 A' 1043 1043 12.64 5.92 0.72 0.84
10 A' 616 616 29.21 25.32 0.30 0.46
11 A' 311 311 2.36 2.61 0.42 0.59
12 A" 3344 3344 14.72 45.90 0.75 0.86
13 A" 3287 3287 15.24 79.67 0.75 0.86
14 A" 1623 1623 6.28 17.89 0.75 0.86
15 A" 1379 1379 0.38 5.90 0.75 0.86
16 A" 1133 1133 0.24 5.53 0.75 0.86
17 A" 830 830 3.11 0.36 0.75 0.86
18 A" 281 281 0.05 0.02 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 15479.8 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 15479.8 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 CBS-Q
ABC
0.99749 0.12774 0.11831

See section I.F.4 to change rotational constant units
Geometric Data calculated at CBS-Q

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.575 -2.028 0.000
C2 0.601 -1.065 0.000
Br3 0.000 0.792 0.000
H4 1.217 -1.174 0.881
H5 1.217 -1.174 -0.881
H6 -0.202 -3.052 0.000
H7 -1.194 -1.888 0.881
H8 -1.194 -1.888 -0.881

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.51932.87852.17212.17211.08971.08601.0860
C21.51931.95221.08131.08132.14312.16202.1620
Br32.87851.95222.47502.47503.84993.06413.0641
H42.17211.08132.47501.76282.51392.51513.0711
H52.17211.08132.47501.76282.51393.07112.5151
H61.08972.14313.84992.51392.51391.76481.7648
H71.08602.16203.06412.51513.07111.76481.7619
H81.08602.16203.06413.07112.51511.76481.7619

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 111.421 C1 C2 H4 112.179
C1 C2 H5 112.179 C2 C1 H6 109.344
C2 C1 H7 111.078 C2 C1 H8 111.078
Br3 C2 H4 105.739 Br3 C2 H5 105.739
H4 C2 H5 109.191 H6 C1 H7 108.416
H6 C1 H8 108.416 H7 C1 H8 108.431
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability