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

using model chemistry: TPSSh/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes Cs 1A'
Energy calculated at TPSSh/STO-3G
 hartrees
Energy at 0K-169.974625
Energy at 298.15K 
HF Energy-169.974625
Nuclear repulsion energy100.556722
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 TPSSh/STO-3G
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' 3497 3497 0.16 33.73 0.73 0.84
2 A' 3332 3332 0.63 4.74 0.75 0.86
3 A' 3327 3327 0.21 85.46 0.04 0.07
4 A' 2376 2376 8.90 19.86 0.24 0.39
5 A' 1689 1689 3.10 9.56 0.74 0.85
6 A' 1634 1634 2.10 20.65 0.74 0.85
7 A' 1570 1570 0.40 3.94 0.75 0.86
8 A' 1452 1452 5.47 7.15 0.68 0.81
9 A' 1175 1175 4.06 3.15 0.24 0.39
10 A' 1084 1084 0.87 5.65 0.55 0.71
11 A' 869 869 0.06 3.81 0.20 0.33
12 A' 541 541 1.03 0.91 0.31 0.47
13 A' 212 212 1.90 1.63 0.73 0.84
14 A" 3502 3502 0.12 18.33 0.75 0.86
15 A" 3428 3428 0.56 41.16 0.75 0.86
16 A" 1682 1682 3.58 17.84 0.75 0.86
17 A" 1378 1378 0.00 11.90 0.75 0.86
18 A" 1194 1194 0.33 0.64 0.75 0.86
19 A" 843 843 5.10 0.20 0.75 0.86
20 A" 378 378 0.12 1.70 0.75 0.86
21 A" 209 209 0.45 0.26 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 17684.5 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 17684.5 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 TPSSh/STO-3G
ABC
0.90126 0.14886 0.13434

See section I.F.4 to change rotational constant units
Geometric Data calculated at TPSSh/STO-3G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.542 0.590 0.000
C2 0.000 0.837 0.000
C3 -0.779 -0.446 0.000
N4 -1.392 -1.477 0.000
H5 2.066 1.559 0.000
H6 1.842 0.023 0.896
H7 1.842 0.023 -0.896
H8 -0.291 1.424 0.895
H9 -0.291 1.424 -0.895

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.56182.54233.58871.10191.10131.10132.20312.2031
C21.56181.50202.70062.18852.20372.20371.10821.1082
C32.54231.50201.19873.48132.80942.80942.12982.1298
N43.58872.70061.19874.60163.67533.67533.22893.2289
H51.10192.18853.48134.60161.79201.79202.52432.5243
H61.10132.20372.80943.67531.79201.79132.55093.1164
H71.10132.20372.80943.67531.79201.79133.11642.5509
H82.20311.10822.12983.22892.52432.55093.11641.7890
H92.20311.10822.12983.22892.52433.11642.55091.7890

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 112.140 C1 C2 H8 110.044
C1 C2 H9 110.044 C2 C1 H5 109.277
C2 C1 H6 110.495 C2 C1 H7 110.495
C2 C3 N4 179.463 C3 C2 H8 108.424
C3 C2 H9 108.424 H5 C1 H6 108.851
H5 C1 H7 108.851 H6 C1 H7 108.834
H8 C2 H9 107.636
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at TPSSh/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.194      
2 C -0.122      
3 C 0.054      
4 N -0.184      
5 H 0.080      
6 H 0.082      
7 H 0.082      
8 H 0.101      
9 H 0.101      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.742 2.562 0.000 3.099
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.798 0.939 0.000
y 0.939 3.381 0.000
z 0.000 0.000 2.000


<r2> (average value of r2) Å2
<r2> 90.235
(<r2>)1/2 9.499