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All results from a given calculation for C2H5CN (ethyl cyanide)

using model chemistry: B1B95/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes Cs 1A'
Energy calculated at B1B95/6-31G*
 hartrees
Energy at 0K-171.979489
Energy at 298.15K 
HF Energy-171.979489
Nuclear repulsion energy103.005940
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 B1B95/6-31G*
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' 3183 3022 15.69 74.40 0.72 0.84
2 A' 3099 2942 18.27 64.58 0.02 0.04
3 A' 3094 2937 4.39 147.86 0.06 0.11
4 A' 2405 2283 9.05 58.15 0.29 0.45
5 A' 1533 1456 6.07 10.90 0.74 0.85
6 A' 1499 1423 5.06 18.12 0.71 0.83
7 A' 1440 1367 1.61 2.86 0.66 0.80
8 A' 1367 1298 3.11 5.76 0.61 0.76
9 A' 1107 1051 4.94 3.59 0.16 0.28
10 A' 1044 991 0.65 4.81 0.53 0.69
11 A' 860 817 0.09 4.82 0.18 0.31
12 A' 553 525 1.06 1.92 0.42 0.60
13 A' 213 202 4.13 2.85 0.73 0.84
14 A" 3189 3027 14.71 31.37 0.75 0.86
15 A" 3137 2978 1.39 92.37 0.75 0.86
16 A" 1526 1449 7.80 19.24 0.75 0.86
17 A" 1302 1236 0.04 8.31 0.75 0.86
18 A" 1125 1068 0.25 0.14 0.75 0.86
19 A" 796 756 4.88 0.37 0.75 0.86
20 A" 401 380 0.32 3.43 0.75 0.86
21 A" 227 215 1.00 0.61 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16548.9 cm-1
Scaled (by 0.9493) Zero Point Vibrational Energy (zpe) 15709.9 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 B1B95/6-31G*
ABC
0.93888 0.15686 0.14146

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.509 0.566 0.000
C2 0.000 0.810 0.000
C3 -0.766 -0.432 0.000
N4 -1.362 -1.425 0.000
H5 2.038 1.521 0.000
H6 1.813 0.004 0.884
H7 1.813 0.004 -0.884
H8 -0.296 1.392 0.878
H9 -0.296 1.392 -0.878

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.52882.48473.49371.09151.09081.09082.17052.1705
C21.52881.45992.61732.15842.17262.17261.09371.0937
C32.48471.45991.15743.41742.76142.76142.07832.0783
N43.49372.61731.15744.49843.59223.59223.13683.1368
H51.09152.15843.41744.49841.77001.77002.49712.4971
H61.09082.17262.76143.59221.77001.76762.52523.0789
H71.09082.17262.76143.59221.77001.76763.07892.5252
H82.17051.09372.07833.13682.49712.52523.07891.7557
H92.17051.09372.07833.13682.49713.07892.52521.7557

picture of ethyl cyanide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 112.456 C1 C2 H8 110.614
C1 C2 H9 110.614 C2 C1 H5 109.795
C2 C1 H6 110.960 C2 C1 H7 110.960
C2 C3 N4 179.326 C3 C2 H8 108.093
C3 C2 H9 108.093 H5 C1 H6 108.405
H5 C1 H7 108.405 H6 C1 H7 108.234
H8 C2 H9 106.757
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.494      
2 C -0.387      
3 C 0.339      
4 N -0.458      
5 H 0.181      
6 H 0.191      
7 H 0.191      
8 H 0.218      
9 H 0.218      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.224 3.234 0.000 3.925
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.633 -3.667 0.000
y -3.667 -27.086 0.000
z 0.000 0.000 -23.433
Traceless
 xyz
x -1.373 -3.667 0.000
y -3.667 -2.053 0.000
z 0.000 0.000 3.426
Polar
3z2-r26.852
x2-y20.453
xy-3.667
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.188 1.217 0.000
y 1.217 5.748 0.000
z 0.000 0.000 3.948


<r2> (average value of r2) Å2
<r2> 87.621
(<r2>)1/2 9.361