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

using model chemistry: B2PLYP/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes Cs 1A'
Energy calculated at B2PLYP/6-31G**
 hartrees
Energy at 0K-171.890236
Energy at 298.15K 
HF Energy-171.698286
Nuclear repulsion energy102.562620
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 B2PLYP/6-31G**
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' 3184 3184 17.98 70.53 0.72 0.84
2 A' 3101 3101 17.44 10.57 0.52 0.69
3 A' 3099 3099 6.54 197.46 0.03 0.06
4 A' 2307 2307 1.74 48.31 0.29 0.44
5 A' 1542 1542 4.46 10.12 0.74 0.85
6 A' 1509 1509 3.86 18.15 0.72 0.84
7 A' 1451 1451 0.74 2.43 0.67 0.80
8 A' 1376 1376 3.69 5.14 0.61 0.75
9 A' 1113 1113 3.99 3.25 0.15 0.27
10 A' 1034 1034 0.44 5.64 0.49 0.66
11 A' 852 852 0.24 5.16 0.18 0.30
12 A' 543 543 0.89 1.77 0.40 0.58
13 A' 211 211 4.10 2.85 0.73 0.84
14 A" 3190 3190 17.54 29.32 0.75 0.86
15 A" 3143 3143 2.04 89.10 0.75 0.86
16 A" 1535 1535 6.06 18.47 0.75 0.86
17 A" 1311 1311 0.00 8.09 0.75 0.86
18 A" 1134 1134 0.30 0.19 0.75 0.86
19 A" 802 802 3.38 0.32 0.75 0.86
20 A" 390 390 0.36 3.28 0.75 0.86
21 A" 229 229 1.08 0.67 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16528.1 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 16528.1 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 B2PLYP/6-31G**
ABC
0.93357 0.15526 0.14003

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.515 0.572 0.000
C2 0.000 0.816 0.000
C3 -0.768 -0.434 0.000
N4 -1.367 -1.436 0.000
H5 2.043 1.526 0.000
H6 1.818 0.010 0.883
H7 1.818 0.010 -0.883
H8 -0.296 1.395 0.878
H9 -0.296 1.395 -0.878

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.53462.49493.51311.09051.08991.08992.17422.1742
C21.53461.46692.63462.16302.17592.17591.09271.0927
C32.49491.46691.16773.42692.76842.76842.08362.0836
N43.51312.63461.16774.51743.60813.60813.15253.1525
H51.09052.16303.42694.51741.76931.76932.50122.5012
H61.08992.17592.76843.60811.76931.76672.52723.0803
H71.08992.17592.76843.60811.76931.76673.08032.5272
H82.17421.09272.08363.15252.50122.52723.08031.7556
H92.17421.09272.08363.15252.50123.08032.52721.7556

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 112.422 C1 C2 H8 110.567
C1 C2 H9 110.567 C2 C1 H5 109.805
C2 C1 H6 110.867 C2 C1 H7 110.867
C2 C3 N4 179.331 C3 C2 H8 108.090
C3 C2 H9 108.090 H5 C1 H6 108.471
H5 C1 H7 108.471 H6 C1 H7 108.287
H8 C2 H9 106.900
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.324      
2 C -0.260      
3 C 0.299      
4 N -0.427      
5 H 0.123      
6 H 0.135      
7 H 0.135      
8 H 0.160      
9 H 0.160      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.190 3.192 0.000 3.871
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.914 -3.712 -0.008
y -3.712 -27.475 -0.007
z -0.008 -0.007 -23.707
Traceless
 xyz
x -1.323 -3.712 -0.008
y -3.712 -2.165 -0.007
z -0.008 -0.007 3.488
Polar
3z2-r26.976
x2-y20.562
xy-3.712
xz-0.008
yz-0.007


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.182 1.194 0.000
y 1.194 5.739 0.000
z 0.000 0.000 3.978


<r2> (average value of r2) Å2
<r2> 88.471
(<r2>)1/2 9.406