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

using model chemistry: HF/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at HF/6-31G(2df,p)
 hartrees
Energy at 0K-2648.729143
Energy at 298.15K 
HF Energy-2648.729143
Nuclear repulsion energy165.197936
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 HF/6-31G(2df,p)
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' 3253 2946 40.25 61.93 0.11 0.19
2 A' 3238 2932 1.75 104.73 0.45 0.62
3 A' 3172 2872 26.32 123.27 0.07 0.14
4 A' 1615 1462 1.31 4.68 0.74 0.85
5 A' 1609 1457 1.16 13.02 0.74 0.85
6 A' 1537 1392 2.28 2.46 0.72 0.84
7 A' 1399 1267 61.78 2.79 0.37 0.54
8 A' 1157 1048 0.77 4.81 0.21 0.34
9 A' 1040 942 11.60 4.30 0.71 0.83
10 A' 620 561 23.40 22.68 0.23 0.38
11 A' 311 282 1.99 2.34 0.29 0.46
12 A" 3312 2999 12.59 35.02 0.75 0.86
13 A" 3263 2954 12.43 71.66 0.75 0.86
14 A" 1604 1453 6.72 14.45 0.75 0.86
15 A" 1371 1242 0.14 3.63 0.75 0.86
16 A" 1129 1022 0.11 2.72 0.75 0.86
17 A" 829 751 2.67 0.07 0.75 0.86
18 A" 279 252 0.05 0.01 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 15368.4 cm-1
Scaled (by 0.9055) Zero Point Vibrational Energy (zpe) 13916.1 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 HF/6-31G(2df,p)
ABC
1.01726 0.12801 0.11869

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.573 -2.018 0.000
C2 0.598 -1.054 0.000
Br3 0.000 0.788 0.000
H4 1.214 -1.168 0.879
H5 1.214 -1.168 -0.879
H6 -0.197 -3.039 0.000
H7 -1.191 -1.879 0.879
H8 -1.191 -1.879 -0.879

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.51682.86372.16532.16531.08731.08361.0836
C21.51681.93601.07931.07932.13842.15752.1575
Br32.86371.93602.46362.46363.83143.05033.0503
H42.16531.07932.46361.75752.50312.50823.0628
H52.16531.07932.46361.75752.50313.06282.5082
H61.08732.13843.83142.50312.50311.76181.7618
H71.08362.15753.05032.50823.06281.76181.7582
H81.08362.15753.05033.06282.50821.76181.7582

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 111.497 C1 C2 H4 111.931
C1 C2 H5 111.931 C2 C1 H6 109.295
C2 C1 H7 111.027 C2 C1 H8 111.027
Br3 C2 H4 106.066 Br3 C2 H5 106.066
H4 C2 H5 109.014 H6 C1 H7 108.492
H6 C1 H8 108.492 H7 C1 H8 108.437
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.400      
2 C -0.332      
3 Br -0.092      
4 H 0.182      
5 H 0.182      
6 H 0.144      
7 H 0.158      
8 H 0.158      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.517 -2.214 0.000 2.274
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.693 -1.049 0.000
y -1.049 -30.135 0.000
z 0.000 0.000 -32.004
Traceless
 xyz
x -0.623 -1.049 0.000
y -1.049 1.713 0.000
z 0.000 0.000 -1.090
Polar
3z2-r2-2.180
x2-y2-1.557
xy-1.049
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.416 -0.219 0.000
y -0.219 7.643 0.000
z 0.000 0.000 5.162


<r2> (average value of r2) Å2
<r2> 104.401
(<r2>)1/2 10.218