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

using model chemistry: PBEPBE/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at PBEPBE/cc-pVTZ
 hartrees
Energy at 0K-2652.953134
Energy at 298.15K 
HF Energy-2652.953134
Nuclear repulsion energy162.884747
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 PBEPBE/cc-pVTZ
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' 3038 3017 21.66      
2 A' 3021 3001 2.87      
3 A' 2965 2944 17.49      
4 A' 1447 1437 2.64      
5 A' 1432 1422 1.29      
6 A' 1356 1347 5.78      
7 A' 1223 1214 47.01      
8 A' 1052 1044 0.33      
9 A' 947 940 18.88      
10 A' 545 541 13.94      
11 A' 274 272 2.23      
12 A" 3087 3066 9.82      
13 A" 3053 3032 5.25      
14 A" 1429 1419 9.95      
15 A" 1220 1212 0.44      
16 A" 994 987 0.06      
17 A" 748 743 4.60      
18 A" 246 245 0.01      

Unscaled Zero Point Vibrational Energy (zpe) 14038.3 cm-1
Scaled (by 0.9931) Zero Point Vibrational Energy (zpe) 13941.5 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 PBEPBE/cc-pVTZ
ABC
1.00506 0.12419 0.11538

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.573 -2.042 0.000
C2 0.598 -1.084 0.000
Br3 0.000 0.800 0.000
H4 1.223 -1.180 0.893
H5 1.223 -1.180 -0.893
H6 -0.195 -3.077 0.000
H7 -1.201 -1.907 0.890
H8 -1.201 -1.907 -0.890

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.51312.89992.18342.18341.10181.09731.0973
C21.51311.97671.09471.09472.14532.16902.1690
Br32.89991.97672.49342.49343.88253.09283.0928
H42.18341.09472.49341.78632.53132.53073.0957
H52.18341.09472.49341.78632.53133.09572.5307
H61.10182.14533.88252.53132.53131.78111.7811
H71.09732.16903.09282.53073.09571.78111.7797
H81.09732.16903.09283.09572.53071.78111.7797

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 111.710 C1 C2 H4 112.720
C1 C2 H5 112.720 C2 C1 H6 109.245
C2 C1 H7 111.386 C2 C1 H8 111.386
Br3 C2 H4 104.882 Br3 C2 H5 104.882
H4 C2 H5 109.358 H6 C1 H7 108.176
H6 C1 H8 108.176 H7 C1 H8 108.366
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.279      
2 C -0.157      
3 Br -0.135      
4 H 0.121      
5 H 0.121      
6 H 0.101      
7 H 0.114      
8 H 0.114      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.440 -2.086 0.000 2.132
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -32.095 -0.941 0.000
y -0.941 -30.166 0.000
z 0.000 0.000 -32.368
Traceless
 xyz
x -0.828 -0.941 0.000
y -0.941 2.065 0.000
z 0.000 0.000 -1.237
Polar
3z2-r2-2.475
x2-y2-1.929
xy-0.941
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.861 -0.110 0.000
y -0.110 8.815 0.000
z 0.000 0.000 5.385


<r2> (average value of r2) Å2
<r2> 106.936
(<r2>)1/2 10.341