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: BLYP/6-311+G(3df,2p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at BLYP/6-311+G(3df,2p)
 hartrees
Energy at 0K-2653.354493
Energy at 298.15K 
HF Energy-2653.354493
Nuclear repulsion energy161.090210
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 BLYP/6-311+G(3df,2p)
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' 3022 3005 22.27 76.90 0.08 0.15
2 A' 3005 2989 2.11 115.13 0.35 0.52
3 A' 2945 2929 19.96 230.12 0.11 0.19
4 A' 1467 1459 2.53 3.67 0.74 0.85
5 A' 1452 1444 0.99 5.82 0.69 0.82
6 A' 1378 1370 3.89 2.03 0.52 0.69
7 A' 1231 1224 52.46 8.94 0.25 0.40
8 A' 1039 1034 0.13 3.31 0.13 0.23
9 A' 937 932 20.46 4.23 0.62 0.76
10 A' 518 515 17.66 21.81 0.18 0.31
11 A' 272 270 2.67 3.92 0.27 0.42
12 A" 3077 3061 7.64 32.95 0.75 0.86
13 A" 3032 3015 8.67 71.11 0.75 0.86
14 A" 1449 1441 9.66 5.85 0.75 0.86
15 A" 1229 1222 0.19 0.76 0.75 0.86
16 A" 997 992 0.05 1.49 0.75 0.86
17 A" 756 752 3.41 0.00 0.75 0.86
18 A" 246 245 0.00 0.00 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 14026.6 cm-1
Scaled (by 0.9945) Zero Point Vibrational Energy (zpe) 13949.5 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 BLYP/6-311+G(3df,2p)
ABC
0.99875 0.12085 0.11241

See section I.F.4 to change rotational constant units
Geometric Data calculated at BLYP/6-311+G(3df,2p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.576 -2.069 0.000
C2 0.602 -1.106 0.000
Br3 0.000 0.812 0.000
H4 1.223 -1.194 0.893
H5 1.223 -1.194 -0.893
H6 -0.195 -3.101 0.000
H7 -1.203 -1.938 0.889
H8 -1.203 -1.938 -0.889

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.52092.93782.19062.19061.10031.09511.0951
C21.52092.01051.09121.09122.14762.17622.1762
Br32.93782.01052.51342.51343.91773.12993.1299
H42.19061.09122.51341.78542.53832.53713.1000
H52.19061.09122.51341.78542.53833.10002.5371
H61.10032.14763.91772.53832.53831.77721.7772
H71.09512.17623.12992.53713.10001.77721.7771
H81.09512.17623.12993.10002.53711.77721.7771

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 111.841 C1 C2 H4 112.964
C1 C2 H5 112.964 C2 C1 H6 108.977
C2 C1 H7 111.550 C2 C1 H8 111.550
Br3 C2 H4 104.305 Br3 C2 H5 104.305
H4 C2 H5 109.783 H6 C1 H7 108.093
H6 C1 H8 108.093 H7 C1 H8 108.459
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/6-311+G(3df,2p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.344      
2 C -0.369      
3 Br -0.131      
4 H 0.183      
5 H 0.183      
6 H 0.154      
7 H 0.162      
8 H 0.162      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.447 -2.213 0.000 2.258
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -32.491 -0.942 0.000
y -0.942 -30.500 0.000
z 0.000 0.000 -32.806
Traceless
 xyz
x -0.838 -0.942 0.000
y -0.942 2.148 0.000
z 0.000 0.000 -1.310
Polar
3z2-r2-2.620
x2-y2-1.991
xy-0.942
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.838 -0.027 0.000
y -0.027 9.612 0.000
z 0.000 0.000 6.442


<r2> (average value of r2) Å2
<r2> 109.278
(<r2>)1/2 10.454