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: B1B95/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes Cs 1A'
Energy calculated at B1B95/cc-pVDZ
 hartrees
Energy at 0K-171.990011
Energy at 298.15K 
HF Energy-171.990011
Nuclear repulsion energy102.922341
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 B1B95/cc-pVDZ
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' 3176 3053 12.86 80.06 0.71 0.83
2 A' 3084 2964 7.81 88.45 0.09 0.17
3 A' 3083 2964 14.81 160.33 0.01 0.01
4 A' 2397 2304 9.92 61.41 0.26 0.42
5 A' 1480 1423 5.50 8.48 0.74 0.85
6 A' 1445 1389 5.12 14.57 0.72 0.84
7 A' 1398 1344 0.71 1.84 0.52 0.68
8 A' 1340 1288 4.30 3.07 0.54 0.70
9 A' 1094 1051 3.12 4.97 0.18 0.30
10 A' 1046 1006 0.95 3.33 0.61 0.75
11 A' 861 828 0.11 4.93 0.13 0.23
12 A' 550 529 0.93 1.56 0.36 0.53
13 A' 212 204 3.44 2.56 0.73 0.84
14 A" 3179 3056 11.61 34.11 0.75 0.86
15 A" 3128 3007 0.90 98.79 0.75 0.86
16 A" 1469 1412 7.35 14.53 0.75 0.86
17 A" 1277 1227 0.02 4.90 0.75 0.86
18 A" 1098 1055 0.62 0.13 0.75 0.86
19 A" 785 754 4.52 0.40 0.75 0.86
20 A" 400 384 0.11 2.57 0.75 0.86
21 A" 227 218 0.75 0.49 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16363.8 cm-1
Scaled (by 0.9612) Zero Point Vibrational Energy (zpe) 15728.9 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 B1B95/cc-pVDZ
ABC
0.94051 0.15662 0.14136

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.507 0.573 0.000
C2 0.000 0.808 0.000
C3 -0.765 -0.435 0.000
N4 -1.359 -1.429 0.000
H5 2.035 1.534 0.000
H6 1.817 0.008 0.888
H7 1.817 0.008 -0.888
H8 -0.305 1.390 0.881
H9 -0.305 1.390 -0.881

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.52532.48533.49581.09661.09661.09662.17412.1741
C21.52531.45902.61732.16032.17482.17481.09921.0992
C32.48531.45901.15833.42242.76642.76642.07792.0779
N43.49582.61731.15834.50513.59773.59773.13623.1362
H51.09662.16033.42244.50511.77821.77822.50392.5039
H61.09662.17482.76643.59771.77821.77532.53223.0887
H71.09662.17482.76643.59771.77821.77533.08872.5322
H82.17411.09922.07793.13622.50392.53223.08871.7623
H92.17411.09922.07793.13622.50393.08872.53221.7623

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 112.751 C1 C2 H8 110.826
C1 C2 H9 110.826 C2 C1 H5 109.891
C2 C1 H6 111.038 C2 C1 H7 111.038
C2 C3 N4 179.224 C3 C2 H8 107.802
C3 C2 H9 107.802 H5 C1 H6 108.347
H5 C1 H7 108.347 H6 C1 H7 108.090
H8 C2 H9 106.570
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.053      
2 C -0.049      
3 C -0.088      
4 N -0.130      
5 H 0.044      
6 H 0.058      
7 H 0.058      
8 H 0.080      
9 H 0.080      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.179 3.171 0.000 3.848
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.658 -3.493 0.000
y -3.493 -27.025 0.000
z 0.000 0.000 -23.589
Traceless
 xyz
x -1.351 -3.493 0.000
y -3.493 -1.901 0.000
z 0.000 0.000 3.252
Polar
3z2-r26.505
x2-y20.366
xy-3.493
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.495 1.159 0.000
y 1.159 5.900 0.000
z 0.000 0.000 4.140


<r2> (average value of r2) Å2
<r2> 87.742
(<r2>)1/2 9.367