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: B3LYPultrafine/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3LYPultrafine/3-21G
 hartrees
Energy at 0K-2640.602978
Energy at 298.15K 
HF Energy-2640.602978
Nuclear repulsion energy161.148600
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 B3LYPultrafine/3-21G
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' 3132 3022 24.02 58.70 0.05 0.09
2 A' 3114 3005 1.70 113.36 0.46 0.63
3 A' 3050 2943 14.64 139.76 0.10 0.18
4 A' 1566 1511 4.33 17.54 0.73 0.85
5 A' 1535 1482 4.60 17.74 0.75 0.86
6 A' 1468 1417 7.37 7.40 0.64 0.78
7 A' 1314 1268 54.82 5.26 0.63 0.78
8 A' 1088 1050 2.83 6.74 0.61 0.76
9 A' 985 951 17.99 4.53 0.75 0.86
10 A' 564 544 14.43 19.29 0.33 0.50
11 A' 287 277 2.43 3.60 0.54 0.71
12 A" 3193 3081 11.95 36.46 0.75 0.86
13 A" 3139 3029 7.98 76.23 0.75 0.86
14 A" 1553 1498 9.56 23.24 0.75 0.86
15 A" 1308 1262 0.95 8.31 0.75 0.86
16 A" 1058 1020 0.06 10.65 0.75 0.86
17 A" 792 764 7.88 1.50 0.75 0.86
18 A" 259 249 0.00 0.03 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 14702.7 cm-1
Scaled (by 0.9649) Zero Point Vibrational Energy (zpe) 14186.6 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 B3LYPultrafine/3-21G
ABC
0.98592 0.12150 0.11279

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYPultrafine/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.582 -2.060 0.000
C2 0.610 -1.109 0.000
Br3 0.000 0.810 0.000
H4 1.225 -1.215 0.892
H5 1.225 -1.215 -0.892
H6 -0.219 -3.096 0.000
H7 -1.201 -1.908 0.888
H8 -1.201 -1.908 -0.888

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.52482.92882.18522.18521.09781.09331.0933
C21.52482.01381.08901.08902.15332.16952.1695
Br32.92882.01382.52942.52943.91273.10143.1014
H42.18521.08902.52941.78482.53402.52323.0880
H52.18521.08902.52941.78482.53403.08802.5232
H61.09782.15333.91272.53402.53401.77931.7793
H71.09332.16953.10142.52323.08801.77931.7759
H81.09332.16953.10143.08802.52321.77931.7759

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 110.965 C1 C2 H4 112.379
C1 C2 H5 112.379 C2 C1 H6 109.300
C2 C1 H7 110.845 C2 C1 H8 110.845
Br3 C2 H4 105.291 Br3 C2 H5 105.291
H4 C2 H5 110.072 H6 C1 H7 108.592
H6 C1 H8 108.592 H7 C1 H8 108.609
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYPultrafine/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.550      
2 C -0.588      
3 Br 0.013      
4 H 0.248      
5 H 0.248      
6 H 0.202      
7 H 0.213      
8 H 0.213      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.449 -2.021 0.000 2.070
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.507 -0.838 0.000
y -0.838 -29.839 0.000
z 0.000 0.000 -31.856
Traceless
 xyz
x -0.659 -0.838 0.000
y -0.838 1.843 0.000
z 0.000 0.000 -1.184
Polar
3z2-r2-2.367
x2-y2-1.668
xy-0.838
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.689 -0.502 0.000
y -0.502 6.934 0.000
z 0.000 0.000 3.368


<r2> (average value of r2) Å2
<r2> 108.413
(<r2>)1/2 10.412