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

using model chemistry: B3LYP/CEP-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 B3LYP/CEP-31G*
 hartrees
Energy at 0K-29.841192
Energy at 298.15K 
HF Energy-29.841192
Nuclear repulsion energy55.000054
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 B3LYP/CEP-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' 3135 3027 34.70 72.58 0.72 0.84
2 A' 3069 2964 11.99 128.95 0.07 0.13
3 A' 3060 2955 26.69 131.42 0.02 0.04
4 A' 2344 2264 13.52 67.23 0.22 0.36
5 A' 1504 1452 7.22 6.48 0.75 0.86
6 A' 1475 1425 5.01 16.00 0.75 0.86
7 A' 1414 1365 1.15 4.27 0.11 0.20
8 A' 1336 1290 4.95 3.95 0.71 0.83
9 A' 1084 1047 5.88 5.59 0.26 0.42
10 A' 1008 973 1.02 7.66 0.47 0.64
11 A' 830 802 0.43 6.72 0.15 0.26
12 A' 529 511 1.94 2.01 0.33 0.50
13 A' 206 199 2.92 3.18 0.73 0.85
14 A" 3145 3037 40.59 15.54 0.75 0.86
15 A" 3113 3006 1.75 101.19 0.75 0.86
16 A" 1496 1445 8.48 14.64 0.75 0.86
17 A" 1279 1235 0.02 10.93 0.75 0.86
18 A" 1099 1061 1.15 0.06 0.75 0.86
19 A" 772 746 4.55 0.10 0.75 0.86
20 A" 376 363 0.03 2.77 0.75 0.86
21 A" 217 209 0.80 0.75 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16245.4 cm-1
Scaled (by 0.9657) Zero Point Vibrational Energy (zpe) 15688.1 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 B3LYP/CEP-31G*
ABC
0.90586 0.15192 0.13687

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/CEP-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.532 0.576 0.000
C2 0.000 0.831 0.000
C3 -0.778 -0.440 0.000
N4 -1.380 -1.454 0.000
H5 2.067 1.541 0.000
H6 1.836 0.006 0.894
H7 1.836 0.006 -0.894
H8 -0.301 1.410 0.889
H9 -0.301 1.410 -0.889

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.55362.52353.55001.10301.10221.10222.20212.2021
C21.55361.49052.66972.18492.20202.20201.10281.1028
C32.52351.49051.17923.46602.79762.79762.10752.1075
N43.55002.66971.17924.56593.64323.64323.18713.1871
H51.10302.18493.46604.56591.79061.79062.53262.5326
H61.10222.20202.79763.64321.79061.78742.55693.1169
H71.10222.20202.79763.64321.79061.78743.11692.5569
H82.20211.10282.10753.18712.53262.55693.11691.7778
H92.20211.10282.10753.18712.53263.11692.55691.7778

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 111.969 C1 C2 H8 110.849
C1 C2 H9 110.849 C2 C1 H5 109.489
C2 C1 H6 110.878 C2 C1 H7 110.878
C2 C3 N4 179.294 C3 C2 H8 107.780
C3 C2 H9 107.780 H5 C1 H6 108.584
H5 C1 H7 108.584 H6 C1 H7 108.362
H8 C2 H9 107.429
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/CEP-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.481      
2 C -0.125      
3 C -0.622      
4 N 0.376      
5 H 0.181      
6 H 0.170      
7 H 0.170      
8 H 0.166      
9 H 0.166      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.344 3.390 0.000 4.121
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -27.013 -3.715 0.000
y -3.715 -27.233 0.000
z 0.000 0.000 -23.530
Traceless
 xyz
x -1.631 -3.715 0.000
y -3.715 -1.962 0.000
z 0.000 0.000 3.593
Polar
3z2-r27.186
x2-y20.220
xy-3.715
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.595 1.229 0.000
y 1.229 5.924 0.000
z 0.000 0.000 4.023


<r2> (average value of r2) Å2
<r2> 73.684
(<r2>)1/2 8.584