return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: B2PLYP=FULLultrafine/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 B2PLYP=FULLultrafine/6-311G**
 hartrees
Energy at 0K-171.958189
Energy at 298.15K 
HF Energy-171.736131
Nuclear repulsion energy102.790980
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=FULLultrafine/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' 3149 3149 19.77 75.07 0.71 0.83
2 A' 3076 3076 9.10 85.74 0.10 0.19
3 A' 3071 3071 16.21 155.89 0.01 0.02
4 A' 2297 2297 1.99 55.75 0.25 0.40
5 A' 1522 1522 6.03 6.43 0.74 0.85
6 A' 1492 1492 5.08 12.86 0.74 0.85
7 A' 1433 1433 1.57 1.64 0.29 0.45
8 A' 1365 1365 2.99 3.19 0.53 0.69
9 A' 1105 1105 3.59 3.16 0.15 0.26
10 A' 1029 1029 0.53 5.74 0.45 0.62
11 A' 847 847 0.22 5.10 0.14 0.24
12 A' 548 548 0.83 1.86 0.33 0.50
13 A' 213 213 3.82 2.81 0.73 0.84
14 A" 3154 3154 19.66 25.70 0.75 0.86
15 A" 3113 3113 1.15 97.56 0.75 0.86
16 A" 1515 1515 7.86 11.29 0.75 0.86
17 A" 1304 1304 0.00 5.14 0.75 0.86
18 A" 1127 1127 0.43 0.09 0.75 0.86
19 A" 799 799 3.03 0.34 0.75 0.86
20 A" 392 392 0.19 2.88 0.75 0.86
21 A" 228 228 0.85 0.61 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16388.0 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 16388.0 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=FULLultrafine/6-311G**
ABC
0.93389 0.15612 0.14075

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULLultrafine/6-311G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.515 0.565 0.000
C2 0.000 0.813 0.000
C3 -0.769 -0.432 0.000
N4 -1.366 -1.427 0.000
H5 2.046 1.518 0.000
H6 1.815 0.002 0.884
H7 1.815 0.002 -0.884
H8 -0.294 1.393 0.878
H9 -0.294 1.393 -0.878

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.53522.49263.50271.09101.09041.09042.17472.1747
C21.53521.46372.62372.16422.17612.17611.09271.0927
C32.49261.46371.16013.42512.76602.76602.08002.0800
N43.50272.62371.16014.50743.59763.59763.14173.1417
H51.09102.16423.42514.50741.77051.77052.50292.5029
H61.09042.17612.76603.59761.77051.76752.52703.0807
H71.09042.17612.76603.59761.77051.76753.08072.5270
H82.17471.09272.08003.14172.50292.52703.08071.7568
H92.17471.09272.08003.14172.50293.08072.52701.7568

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 112.424 C1 C2 H8 110.570
C1 C2 H9 110.570 C2 C1 H5 109.840
C2 C1 H6 110.815 C2 C1 H7 110.815
C2 C3 N4 179.225 C3 C2 H8 108.034
C3 C2 H9 108.034 H5 C1 H6 108.508
H5 C1 H7 108.508 H6 C1 H7 108.284
H8 C2 H9 107.007
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP=FULLultrafine/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.291      
2 C -0.199      
3 C 0.039      
4 N -0.235      
5 H 0.119      
6 H 0.128      
7 H 0.128      
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
  2.206 3.218 0.000 3.902
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -27.370 -3.697 -0.009
y -3.697 -27.782 -0.007
z -0.009 -0.007 -24.037
Traceless
 xyz
x -1.461 -3.697 -0.009
y -3.697 -2.079 -0.007
z -0.009 -0.007 3.539
Polar
3z2-r27.079
x2-y20.412
xy-3.697
xz-0.009
yz-0.007


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.594 1.157 0.001
y 1.157 5.997 0.000
z 0.001 0.000 4.251


<r2> (average value of r2) Å2
<r2> 88.369
(<r2>)1/2 9.400