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

using model chemistry: B3LYP/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 B3LYP/6-31G(2df,p)
 hartrees
Energy at 0K-172.080343
Energy at 298.15K-172.085383
HF Energy-172.080343
Nuclear repulsion energy102.778944
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/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' 3132 3022 16.56      
2 A' 3055 2948 17.62      
3 A' 3048 2941 5.65      
4 A' 2363 2280 8.17      
5 A' 1505 1452 4.24      
6 A' 1471 1420 3.73      
7 A' 1415 1365 0.55      
8 A' 1346 1299 4.01      
9 A' 1091 1053 3.40      
10 A' 1016 981 0.19      
11 A' 841 812 0.17      
12 A' 552 532 0.87      
13 A' 215 208 4.32      
14 A" 3136 3027 15.76      
15 A" 3082 2974 1.81      
16 A" 1496 1444 5.51      
17 A" 1286 1241 0.01      
18 A" 1113 1074 0.23      
19 A" 789 762 3.61      
20 A" 404 390 0.60      
21 A" 219 211 1.10      

Unscaled Zero Point Vibrational Energy (zpe) 16287.3 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 15717.3 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/6-31G(2df,p)
ABC
0.93365 0.15602 0.14067

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.519 0.562 0.000
C2 0.000 0.810 0.000
C3 -0.772 -0.432 0.000
N4 -1.370 -1.421 0.000
H5 2.049 1.518 0.000
H6 1.822 -0.002 0.885
H7 1.822 -0.002 -0.885
H8 -0.293 1.395 0.879
H9 -0.293 1.395 -0.879

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.53902.49733.50401.09301.09261.09262.17912.1791
C21.53901.46242.61802.16752.18232.18231.09561.0956
C32.49731.46241.15563.42912.77432.77432.08372.0837
N43.50402.61801.15564.50833.60353.60353.14083.1408
H51.09302.16753.42914.50831.77381.77382.50372.5037
H61.09262.18232.77433.60351.77381.77022.53483.0880
H71.09262.18232.77433.60351.77381.77023.08802.5348
H82.17911.09562.08373.14082.50372.53483.08801.7573
H92.17911.09562.08373.14082.50373.08802.53481.7573

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 112.592 C1 C2 H8 110.469
C1 C2 H9 110.469 C2 C1 H5 109.717
C2 C1 H6 110.913 C2 C1 H7 110.913
C2 C3 N4 179.305 C3 C2 H8 108.230
C3 C2 H9 108.230 H5 C1 H6 108.503
H5 C1 H7 108.503 H6 C1 H7 108.217
H8 C2 H9 106.634
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.373      
2 C -0.307      
3 C 0.256      
4 N -0.304      
5 H 0.129      
6 H 0.144      
7 H 0.144      
8 H 0.155      
9 H 0.155      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.238 3.223 0.000 3.923
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.778 -3.725 0.000
y -3.725 -27.207 0.000
z 0.000 0.000 -23.479
Traceless
 xyz
x -1.436 -3.725 0.000
y -3.725 -2.079 0.000
z 0.000 0.000 3.514
Polar
3z2-r27.029
x2-y20.429
xy-3.725
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.559 1.176 0.000
y 1.176 5.941 0.000
z 0.000 0.000 4.232


<r2> (average value of r2) Å2
<r2> 88.087
(<r2>)1/2 9.385