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

using model chemistry: B2PLYP/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 B2PLYP/6-31G*
 hartrees
Energy at 0K-171.873323
Energy at 298.15K 
HF Energy-171.690925
Nuclear repulsion energy102.503600
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 B2PLYP/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' 3178 3017 18.34 71.56 0.72 0.84
2 A' 3099 2942 18.71 54.52 0.03 0.05
3 A' 3096 2939 5.27 148.77 0.06 0.11
4 A' 2307 2190 1.75 48.19 0.28 0.44
5 A' 1554 1475 5.22 10.02 0.73 0.85
6 A' 1524 1447 4.03 19.16 0.72 0.84
7 A' 1462 1388 1.07 2.65 0.67 0.80
8 A' 1386 1316 3.49 5.81 0.61 0.76
9 A' 1118 1061 4.46 3.19 0.16 0.27
10 A' 1037 984 0.46 5.77 0.49 0.66
11 A' 853 810 0.26 5.08 0.18 0.31
12 A' 544 517 0.93 1.78 0.40 0.57
13 A' 212 201 4.11 2.83 0.73 0.84
14 A" 3185 3023 17.78 29.97 0.75 0.86
15 A" 3136 2977 2.16 90.47 0.75 0.86
16 A" 1547 1468 6.76 19.20 0.75 0.86
17 A" 1318 1251 0.01 8.74 0.75 0.86
18 A" 1143 1085 0.25 0.19 0.75 0.86
19 A" 808 767 3.67 0.31 0.75 0.86
20 A" 390 371 0.36 3.29 0.75 0.86
21 A" 230 218 1.07 0.67 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16564.1 cm-1
Scaled (by 0.9492) Zero Point Vibrational Energy (zpe) 15722.6 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 B2PLYP/6-31G*
ABC
0.93063 0.15524 0.13997

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.516 0.570 0.000
C2 0.000 0.816 0.000
C3 -0.769 -0.434 0.000
N4 -1.368 -1.436 0.000
H5 2.045 1.526 0.000
H6 1.818 0.007 0.885
H7 1.818 0.007 -0.885
H8 -0.294 1.398 0.879
H9 -0.294 1.398 -0.879

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.53562.49513.51281.09261.09181.09182.17582.1758
C21.53561.46762.63532.16482.17852.17851.09441.0944
C32.49511.46761.16773.42892.76952.76952.08682.0868
N43.51282.63531.16774.51913.60813.60813.15583.1558
H51.09262.16483.42894.51911.77241.77242.50242.5024
H61.09182.17852.76953.60811.77241.76982.52983.0840
H71.09182.17852.76953.60811.77241.76983.08402.5298
H82.17581.09442.08683.15582.50242.52983.08401.7579
H92.17581.09442.08683.15582.50243.08402.52981.7579

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 112.344 C1 C2 H8 110.526
C1 C2 H9 110.526 C2 C1 H5 109.763
C2 C1 H6 110.889 C2 C1 H7 110.889
C2 C3 N4 179.308 C3 C2 H8 108.194
C3 C2 H9 108.194 H5 C1 H6 108.467
H5 C1 H7 108.467 H6 C1 H7 108.290
H8 C2 H9 106.861
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.460      
2 C -0.356      
3 C 0.312      
4 N -0.427      
5 H 0.169      
6 H 0.178      
7 H 0.178      
8 H 0.203      
9 H 0.203      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.191 3.203 0.000 3.880
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.964 -3.719 -0.008
y -3.719 -27.477 -0.006
z -0.008 -0.006 -23.694
Traceless
 xyz
x -1.378 -3.719 -0.008
y -3.719 -2.148 -0.006
z -0.008 -0.006 3.526
Polar
3z2-r27.052
x2-y20.513
xy-3.719
xz-0.008
yz-0.006


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.121 1.190 0.000
y 1.190 5.697 0.000
z 0.000 0.000 3.940


<r2> (average value of r2) Å2
<r2> 88.529
(<r2>)1/2 9.409