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

using model chemistry: PBEPBEultrafine/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 PBEPBEultrafine/6-31G**
 hartrees
Energy at 0K-171.845100
Energy at 298.15K 
HF Energy-171.845100
Nuclear repulsion energy102.099797
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 PBEPBEultrafine/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' 3090 3047 14.24 76.07 0.72 0.84
2 A' 3005 2964 17.09 90.19 0.01 0.02
3 A' 2989 2948 5.67 136.76 0.06 0.11
4 A' 2284 2252 7.13 64.59 0.30 0.46
5 A' 1470 1450 5.49 11.69 0.74 0.85
6 A' 1430 1410 5.17 18.71 0.69 0.81
7 A' 1376 1357 1.25 3.16 0.72 0.84
8 A' 1303 1285 2.79 6.95 0.64 0.78
9 A' 1061 1047 4.49 3.09 0.13 0.23
10 A' 1006 992 0.21 4.22 0.53 0.69
11 A' 833 821 0.09 4.75 0.18 0.30
12 A' 533 526 1.12 1.79 0.38 0.55
13 A' 205 202 3.43 2.89 0.73 0.84
14 A" 3094 3052 13.50 35.23 0.75 0.86
15 A" 3029 2988 1.84 90.53 0.75 0.86
16 A" 1462 1442 7.11 19.43 0.75 0.86
17 A" 1247 1230 0.07 8.19 0.75 0.86
18 A" 1074 1059 0.37 0.22 0.75 0.86
19 A" 767 757 5.12 0.38 0.75 0.86
20 A" 385 380 0.10 3.15 0.75 0.86
21 A" 218 215 0.88 0.58 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 15930.2 cm-1
Scaled (by 0.9863) Zero Point Vibrational Energy (zpe) 15711.9 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 PBEPBEultrafine/6-31G**
ABC
0.92681 0.15403 0.13900

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.522 0.573 0.000
C2 0.000 0.813 0.000
C3 -0.771 -0.433 0.000
N4 -1.375 -1.439 0.000
H5 2.052 1.538 0.000
H6 1.832 0.007 0.891
H7 1.832 0.007 -0.891
H8 -0.300 1.402 0.885
H9 -0.300 1.402 -0.885

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.54092.50433.52771.10071.10021.10022.18832.1883
C21.54091.46542.63882.17642.19052.19051.10451.1045
C32.50431.46541.17353.44322.78592.78592.09162.0916
N43.52772.63881.17354.53983.62893.62893.16473.1647
H51.10072.17643.44324.53981.78521.78522.51612.5161
H61.10022.19052.78593.62891.78521.78212.54743.1052
H71.10022.19052.78593.62891.78521.78213.10522.5474
H82.18831.10452.09163.16472.51612.54743.10521.7693
H92.18831.10452.09163.16472.51613.10522.54741.7693

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 112.802 C1 C2 H8 110.542
C1 C2 H9 110.542 C2 C1 H5 109.830
C2 C1 H6 110.971 C2 C1 H7 110.971
C2 C3 N4 179.236 C3 C2 H8 108.134
C3 C2 H9 108.134 H5 C1 H6 108.408
H5 C1 H7 108.408 H6 C1 H7 108.170
H8 C2 H9 106.441
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.368      
2 C -0.299      
3 C 0.344      
4 N -0.461      
5 H 0.137      
6 H 0.150      
7 H 0.150      
8 H 0.173      
9 H 0.173      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.204 3.178 0.000 3.867
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.600 -3.610 0.000
y -3.610 -27.092 0.000
z 0.000 0.000 -23.551
Traceless
 xyz
x -1.279 -3.610 0.000
y -3.610 -2.016 0.000
z 0.000 0.000 3.295
Polar
3z2-r26.590
x2-y20.492
xy-3.610
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.476 1.323 0.000
y 1.323 6.031 0.000
z 0.000 0.000 4.089


<r2> (average value of r2) Å2
<r2> 88.904
(<r2>)1/2 9.429