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

using model chemistry: B3LYPultrafine/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 B3LYPultrafine/6-31G(2df,p)
 hartrees
Energy at 0K-172.080341
Energy at 298.15K 
HF Energy-172.080341
Nuclear repulsion energy102.779561
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 B3LYPultrafine/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' 3130 3020 16.57 69.88 0.71 0.83
2 A' 3054 2947 17.80 71.43 0.02 0.03
3 A' 3047 2940 5.51 138.30 0.06 0.11
4 A' 2363 2280 8.13 62.34 0.25 0.40
5 A' 1505 1452 4.23 8.18 0.73 0.84
6 A' 1471 1419 3.74 16.00 0.70 0.82
7 A' 1415 1366 0.55 1.73 0.72 0.84
8 A' 1346 1299 4.01 5.62 0.60 0.75
9 A' 1091 1053 3.40 3.10 0.10 0.18
10 A' 1016 981 0.19 5.43 0.44 0.62
11 A' 841 812 0.17 4.91 0.15 0.25
12 A' 552 533 0.89 1.43 0.31 0.47
13 A' 215 207 4.33 2.22 0.72 0.84
14 A" 3135 3025 15.84 28.42 0.75 0.86
15 A" 3082 2974 1.75 87.34 0.75 0.86
16 A" 1496 1444 5.53 15.52 0.75 0.86
17 A" 1286 1241 0.01 6.39 0.75 0.86
18 A" 1114 1075 0.23 0.20 0.75 0.86
19 A" 790 762 3.61 0.35 0.75 0.86
20 A" 404 390 0.60 2.31 0.75 0.86
21 A" 223 215 1.11 0.37 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16287.2 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 15717.1 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 B3LYPultrafine/6-31G(2df,p)
ABC
0.93410 0.15600 0.14067

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYPultrafine/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.518 0.563 0.000
C2 0.000 0.810 0.000
C3 -0.771 -0.433 0.000
N4 -1.370 -1.421 0.000
H5 2.049 1.519 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
C11.53852.49693.50411.09321.09271.09272.17902.1790
C21.53851.46282.61832.16832.18192.18191.09561.0956
C32.49691.46281.15563.42982.77362.77362.08352.0835
N43.50412.61831.15564.50923.60333.60333.14033.1403
H51.09322.16833.42984.50921.77371.77372.50532.5053
H61.09272.18192.77363.60331.77371.77022.53463.0879
H71.09272.18192.77363.60331.77371.77023.08792.5346
H82.17901.09562.08353.14032.50532.53463.08791.7577
H92.17901.09562.08353.14032.50533.08792.53461.7577

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 112.571 C1 C2 H8 110.498
C1 C2 H9 110.498 C2 C1 H5 109.801
C2 C1 H6 110.909 C2 C1 H7 110.909
C2 C3 N4 179.370 C3 C2 H8 108.194
C3 C2 H9 108.194 H5 C1 H6 108.474
H5 C1 H7 108.474 H6 C1 H7 108.197
H8 C2 H9 106.671
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYPultrafine/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 -0.303      
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
  2.237 3.223 0.000 3.923
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.777 -3.725 0.000
y -3.725 -27.212 0.000
z 0.000 0.000 -23.478
Traceless
 xyz
x -1.432 -3.725 0.000
y -3.725 -2.084 0.000
z 0.000 0.000 3.516
Polar
3z2-r27.032
x2-y20.434
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 5.940 0.000
z 0.000 0.000 4.232


<r2> (average value of r2) Å2
<r2> 88.088
(<r2>)1/2 9.385