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

using model chemistry: mPW1PW91/aug-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 mPW1PW91/aug-cc-pVTZ
 hartrees
Energy at 0K-2653.631461
Energy at 298.15K 
HF Energy-2653.631461
Nuclear repulsion energy164.399228
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 mPW1PW91/aug-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' 3128 2997 20.48 69.98 0.45 0.62
2 A' 3112 2982 2.52 126.60 0.15 0.26
3 A' 3052 2924 16.92 208.50 0.05 0.10
4 A' 1498 1435 2.62 3.04 0.75 0.86
5 A' 1486 1424 1.57 5.13 0.72 0.84
6 A' 1410 1351 6.04 1.53 0.55 0.71
7 A' 1280 1226 47.47 6.75 0.27 0.42
8 A' 1089 1043 0.12 3.63 0.13 0.22
9 A' 983 942 16.75 3.19 0.63 0.77
10 A' 585 560 14.55 19.59 0.17 0.29
11 A' 286 274 1.95 2.56 0.27 0.43
12 A" 3180 3046 6.15 27.18 0.75 0.86
13 A" 3142 3011 6.24 70.74 0.75 0.86
14 A" 1482 1420 10.56 5.27 0.75 0.86
15 A" 1269 1215 0.26 0.77 0.75 0.86
16 A" 1039 995 0.02 1.12 0.75 0.86
17 A" 774 741 3.96 0.01 0.75 0.86
18 A" 255 244 0.01 0.00 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 14524.2 cm-1
Scaled (by 0.9581) Zero Point Vibrational Energy (zpe) 13915.7 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 mPW1PW91/aug-cc-pVTZ
ABC
1.01835 0.12661 0.11756

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/aug-cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.570 -2.025 0.000
C2 0.595 -1.069 0.000
Br3 0.000 0.792 0.000
H4 1.215 -1.170 0.885
H5 1.215 -1.170 -0.885
H6 -0.194 -3.051 0.000
H7 -1.192 -1.889 0.883
H8 -1.192 -1.889 -0.883

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.50702.87452.16822.16821.09231.08861.0886
C21.50701.95381.08561.08562.13322.15542.1554
Br32.87451.95382.47222.47223.84803.06443.0644
H42.16821.08562.47221.77032.51122.51253.0721
H52.16821.08562.47221.77032.51123.07212.5125
H61.09232.13323.84802.51122.51121.76781.7678
H71.08862.15543.06442.51253.07211.76781.7655
H81.08862.15543.06443.07212.51251.76781.7655

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 111.665 C1 C2 H4 112.480
C1 C2 H5 112.480 C2 C1 H6 109.263
C2 C1 H7 111.254 C2 C1 H8 111.254
Br3 C2 H4 105.244 Br3 C2 H5 105.244
H4 C2 H5 109.237 H6 C1 H7 108.305
H6 C1 H8 108.305 H7 C1 H8 108.368
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.596      
2 C -0.364      
3 Br -0.116      
4 H 0.200      
5 H 0.200      
6 H 0.188      
7 H 0.244      
8 H 0.244      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.462 -2.140 0.000 2.190
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.889 -0.969 0.000
y -0.969 -30.056 0.000
z 0.000 0.000 -32.158
Traceless
 xyz
x -0.782 -0.969 0.000
y -0.969 1.968 0.000
z 0.000 0.000 -1.186
Polar
3z2-r2-2.371
x2-y2-1.833
xy-0.969
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.659 -0.034 0.000
y -0.034 9.029 0.000
z 0.000 0.000 6.258


<r2> (average value of r2) Å2
<r2> 105.237
(<r2>)1/2 10.259