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

using model chemistry: MP4/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP4/6-31G*
 hartrees
Energy at 0K-2648.961621
Energy at 298.15K 
HF Energy-2648.538447
Nuclear repulsion energy162.936533
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 MP4/6-31G*
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' 3146 3004        
2 A' 3121 2980        
3 A' 3063 2925        
4 A' 1544 1474        
5 A' 1532 1463        
6 A' 1457 1391        
7 A' 1313 1254        
8 A' 1107 1057        
9 A' 1000 955        
10 A' 575 549        
11 A' 294 281        
12 A" 3193 3049        
13 A" 3163 3020        
14 A" 1532 1463        
15 A" 1296 1237        
16 A" 1056 1009        
17 A" 784 749        
18 A" 272 260        

Unscaled Zero Point Vibrational Energy (zpe) 14724.0 cm-1
Scaled (by 0.9548) Zero Point Vibrational Energy (zpe) 14058.5 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 MP4/6-31G*
ABC
0.99011 0.12486 0.11575

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.579 -2.035 0.000
C2 0.607 -1.085 0.000
Br3 0.000 0.798 0.000
H4 1.229 -1.190 0.893
H5 1.229 -1.190 -0.893
H6 -0.217 -3.073 0.000
H7 -1.202 -1.882 0.889
H8 -1.202 -1.882 -0.889

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.51952.89222.18642.18641.09931.09561.0956
C21.51951.97891.09321.09322.15162.16662.1666
Br32.89221.97892.50212.50213.87753.06903.0690
H42.18641.09322.50211.78582.53632.52673.0918
H52.18641.09322.50211.78582.53633.09182.5267
H61.09932.15163.87752.53632.53631.78251.7825
H71.09562.16663.06902.52673.09181.78251.7777
H81.09562.16663.06903.09182.52671.78251.7777

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 110.841 C1 C2 H4 112.595
C1 C2 H5 112.595 C2 C1 H6 109.446
C2 C1 H7 110.847 C2 C1 H8 110.847
Br3 C2 H4 105.400 Br3 C2 H5 105.400
H4 C2 H5 109.525 H6 C1 H7 108.604
H6 C1 H8 108.604 H7 C1 H8 108.433
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability