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

using model chemistry: B3LYP/6-311G**

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/6-311G**
 hartrees
Energy at 0K-172.117487
Energy at 298.15K 
HF Energy-172.117487
Nuclear repulsion energy102.868626
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/6-311G**
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' 3115 3011 20.61 78.93 0.71 0.83
2 A' 3045 2944 21.23 49.87 0.04 0.08
3 A' 3041 2940 4.94 199.37 0.04 0.07
4 A' 2359 2281 8.15 67.05 0.25 0.41
5 A' 1508 1458 6.59 6.69 0.74 0.85
6 A' 1476 1427 5.55 13.13 0.72 0.84
7 A' 1419 1372 1.64 1.51 0.34 0.51
8 A' 1351 1306 2.84 3.96 0.53 0.70
9 A' 1094 1057 4.03 2.63 0.15 0.26
10 A' 1015 981 0.40 5.96 0.42 0.59
11 A' 841 813 0.15 4.82 0.14 0.25
12 A' 553 535 0.94 1.97 0.32 0.48
13 A' 215 208 3.94 2.89 0.73 0.84
14 A" 3120 3016 20.51 29.72 0.75 0.86
15 A" 3073 2971 1.54 98.96 0.75 0.86
16 A" 1499 1450 8.22 11.44 0.75 0.86
17 A" 1291 1248 0.02 5.14 0.75 0.86
18 A" 1116 1079 0.38 0.06 0.75 0.86
19 A" 793 767 3.70 0.39 0.75 0.86
20 A" 397 384 0.22 3.02 0.75 0.86
21 A" 223 216 0.87 0.55 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16271.7 cm-1
Scaled (by 0.9668) Zero Point Vibrational Energy (zpe) 15731.5 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 B3LYP/6-311G**
ABC
0.93736 0.15605 0.14077

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-311G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.519 0.564 0.000
C2 0.000 0.808 0.000
C3 -0.772 -0.433 0.000
N4 -1.369 -1.420 0.000
H5 2.047 1.520 0.000
H6 1.823 0.002 0.884
H7 1.823 0.002 -0.884
H8 -0.295 1.391 0.878
H9 -0.295 1.391 -0.878

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.53822.49903.50351.09201.09141.09142.17792.1779
C21.53821.46252.61512.16722.18122.18121.09411.0941
C32.49901.46251.15273.43012.77672.77672.08012.0801
N43.50352.61511.15274.50673.60463.60463.13433.1343
H51.09202.16723.43014.50671.77101.77102.50452.5045
H61.09142.18122.77673.60461.77101.76842.53303.0858
H71.09142.18122.77673.60461.77101.76843.08582.5330
H82.17791.09412.08013.13432.50452.53303.08581.7564
H92.17791.09412.08013.13432.50453.08582.53301.7564

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 112.748 C1 C2 H8 110.518
C1 C2 H9 110.518 C2 C1 H5 109.807
C2 C1 H6 110.948 C2 C1 H7 110.948
C2 C3 N4 179.277 C3 C2 H8 108.032
C3 C2 H9 108.032 H5 C1 H6 108.417
H5 C1 H7 108.417 H6 C1 H7 108.225
H8 C2 H9 106.766
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.296      
2 C -0.201      
3 C 0.035      
4 N -0.231      
5 H 0.120      
6 H 0.130      
7 H 0.130      
8 H 0.157      
9 H 0.157      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.255 3.267 0.000 3.970
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -27.312 -3.736 0.000
y -3.736 -27.688 0.000
z 0.000 0.000 -23.971
Traceless
 xyz
x -1.483 -3.736 0.000
y -3.736 -2.047 0.000
z 0.000 0.000 3.530
Polar
3z2-r27.059
x2-y20.376
xy-3.736
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.701 1.200 0.000
y 1.200 6.083 0.000
z 0.000 0.000 4.289


<r2> (average value of r2) Å2
<r2> 88.345
(<r2>)1/2 9.399