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=FULL/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=FULL/6-31G(2df,p)
 hartrees
Energy at 0K-2649.316877
Energy at 298.15K 
HF Energy-2648.728617
Nuclear repulsion energy167.049545
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/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' 3212 3019 9.62 64.63 0.72 0.84
2 A' 3162 2972 8.03 80.40 0.11 0.20
3 A' 3118 2931 11.14 113.44 0.04 0.08
4 A' 1540 1447 1.93 8.21 0.74 0.85
5 A' 1524 1433 1.59 10.43 0.75 0.86
6 A' 1439 1352 5.09 2.89 0.71 0.83
7 A' 1315 1236 37.58 1.56 0.36 0.53
8 A' 1112 1045 0.22 3.89 0.25 0.40
9 A' 1014 953 10.76 2.99 0.73 0.84
10 A' 647 608 7.65 14.01 0.20 0.33
11 A' 306 288 1.07 1.51 0.32 0.49
12 A" 3240 3046 7.25 3.41 0.75 0.86
13 A" 3219 3026 0.26 87.21 0.75 0.86
14 A" 1531 1439 8.45 14.25 0.75 0.86
15 A" 1302 1224 0.43 3.68 0.75 0.86
16 A" 1072 1007 0.06 2.97 0.75 0.86
17 A" 792 744 4.03 0.05 0.75 0.86
18 A" 279 262 0.03 0.00 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 14911.2 cm-1
Scaled (by 0.9399) Zero Point Vibrational Energy (zpe) 14015.0 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/6-31G(2df,p)
ABC
1.01178 0.13207 0.12212

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.573 -1.986 0.000
C2 0.599 -1.031 0.000
Br3 0.000 0.775 0.000
H4 1.221 -1.162 0.881
H5 1.221 -1.162 -0.881
H6 -0.214 -3.016 0.000
H7 -1.193 -1.837 0.881
H8 -1.193 -1.837 -0.881

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.51232.82022.16282.16281.09051.08781.0878
C21.51231.90311.08651.08652.14462.15372.1537
Br32.82021.90312.45332.45333.79693.00383.0038
H42.16281.08652.45331.76252.50492.50713.0647
H52.16281.08652.45331.76252.50493.06472.5071
H61.09052.14463.79692.50492.50491.76791.7679
H71.08782.15373.00382.50713.06471.76791.7627
H81.08782.15373.00383.06472.50711.76791.7627

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 110.809 C1 C2 H4 111.607
C1 C2 H5 111.607 C2 C1 H6 109.910
C2 C1 H7 110.797 C2 C1 H8 110.797
Br3 C2 H4 107.101 Br3 C2 H5 107.101
H4 C2 H5 108.398 H6 C1 H7 108.511
H6 C1 H8 108.511 H7 C1 H8 108.243
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability