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: TPSSh/aug-cc-pVQZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes Cs 1A'
Energy calculated at TPSSh/aug-cc-pVQZ
 hartrees
Energy at 0K-172.151200
Energy at 298.15K 
HF Energy-172.151200
Nuclear repulsion energy102.968608
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 TPSSh/aug-cc-pVQZ
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' 3113 3113 18.91 69.91 0.71 0.83
2 A' 3042 3042 20.25 94.99 0.02 0.04
3 A' 3038 3038 5.00 214.54 0.03 0.06
4 A' 2324 2324 10.02 95.21 0.15 0.27
5 A' 1517 1517 4.48 2.97 0.73 0.84
6 A' 1481 1481 4.85 8.24 0.67 0.80
7 A' 1422 1422 0.87 0.44 0.53 0.69
8 A' 1344 1344 3.28 3.44 0.42 0.59
9 A' 1091 1091 3.22 4.92 0.11 0.20
10 A' 1010 1010 0.20 5.13 0.38 0.55
11 A' 836 836 0.11 6.29 0.07 0.13
12 A' 544 544 0.80 1.49 0.13 0.23
13 A' 208 208 4.15 1.98 0.70 0.83
14 A" 3120 3120 18.16 25.39 0.75 0.86
15 A" 3072 3072 0.96 84.32 0.75 0.86
16 A" 1509 1509 6.53 5.11 0.75 0.86
17 A" 1290 1290 0.01 2.04 0.75 0.86
18 A" 1114 1114 0.46 0.11 0.75 0.86
19 A" 782 782 2.72 0.39 0.75 0.86
20 A" 387 387 0.30 1.20 0.75 0.86
21 A" 217 217 1.03 0.30 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16230.0 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 16230.0 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 TPSSh/aug-cc-pVQZ
ABC
0.93627 0.15660 0.14119

See section I.F.4 to change rotational constant units
Geometric Data calculated at TPSSh/aug-cc-pVQZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.516 0.562 0.000
C2 0.000 0.811 0.000
C3 -0.770 -0.432 0.000
N4 -1.365 -1.420 0.000
H5 2.043 1.517 0.000
H6 1.816 -0.000 0.883
H7 1.816 -0.000 -0.883
H8 -0.295 1.389 0.878
H9 -0.295 1.389 -0.878

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.53592.49273.49731.09031.08951.08952.17562.1756
C21.53591.46172.61552.16132.17612.17611.09241.0924
C32.49271.46171.15383.42182.76682.76682.07692.0769
N43.49732.61551.15384.49903.59423.59423.13223.1322
H51.09032.16133.42184.49901.76991.76992.50032.5003
H61.08952.17612.76683.59421.76991.76692.52703.0806
H71.08952.17612.76683.59421.76991.76693.08062.5270
H82.17561.09242.07693.13222.50032.52703.08061.7569
H92.17561.09242.07693.13222.50033.08062.52701.7569

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 112.497 C1 C2 H8 110.607
C1 C2 H9 110.607 C2 C1 H5 109.601
C2 C1 H6 110.822 C2 C1 H7 110.822
C2 C3 N4 179.253 C3 C2 H8 107.935
C3 C2 H9 107.935 H5 C1 H6 108.581
H5 C1 H7 108.581 H6 C1 H7 108.369
H8 C2 H9 107.052
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at TPSSh/aug-cc-pVQZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -1.196      
2 C -0.564      
3 C 0.060      
4 N -0.368      
5 H 0.459      
6 H 0.376      
7 H 0.376      
8 H 0.428      
9 H 0.428      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.360 3.389 0.000 4.130
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.737 1.202 0.000
y 1.202 6.891 0.000
z 0.000 0.000 5.146


<r2> (average value of r2) Å2
<r2> 88.130
(<r2>)1/2 9.388