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/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 B2PLYP/cc-pVDZ
 hartrees
Energy at 0K-171.891473
Energy at 298.15K 
HF Energy-171.700730
Nuclear repulsion energy102.262019
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/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' 3164 3030 16.26 79.02 0.72 0.83
2 A' 3080 2950 7.03 131.49 0.07 0.13
3 A' 3076 2946 18.02 111.09 0.01 0.02
4 A' 2293 2196 1.72 51.67 0.25 0.41
5 A' 1495 1432 4.74 7.94 0.74 0.85
6 A' 1464 1402 4.08 15.25 0.72 0.84
7 A' 1412 1353 0.44 1.57 0.49 0.66
8 A' 1350 1293 4.69 3.16 0.52 0.68
9 A' 1097 1051 3.03 4.22 0.15 0.26
10 A' 1036 992 0.62 4.84 0.52 0.69
11 A' 850 814 0.25 5.32 0.14 0.24
12 A' 540 517 0.81 1.50 0.33 0.50
13 A' 211 202 3.30 2.54 0.73 0.84
14 A" 3168 3034 15.35 31.20 0.75 0.86
15 A" 3123 2991 1.51 100.71 0.75 0.86
16 A" 1486 1423 6.56 14.55 0.75 0.86
17 A" 1289 1234 0.00 5.12 0.75 0.86
18 A" 1111 1064 0.59 0.15 0.75 0.86
19 A" 791 758 3.22 0.36 0.75 0.86
20 A" 389 373 0.10 2.49 0.75 0.86
21 A" 228 219 0.77 0.53 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16326.8 cm-1
Scaled (by 0.9577) Zero Point Vibrational Energy (zpe) 15636.2 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/cc-pVDZ
ABC
0.92643 0.15469 0.13952

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.516 0.574 0.000
C2 0.000 0.817 0.000
C3 -0.770 -0.435 0.000
N4 -1.367 -1.441 0.000
H5 2.048 1.537 0.000
H6 1.823 0.007 0.891
H7 1.823 0.007 -0.891
H8 -0.301 1.401 0.884
H9 -0.301 1.401 -0.884

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.53522.49873.51781.09951.09941.09942.18292.1829
C21.53521.46992.63982.17062.18412.18411.10151.1015
C32.49871.46991.16993.43902.77642.77642.09122.0912
N43.51782.63981.16994.53103.61473.61473.16163.1616
H51.09952.17063.43904.53101.78401.78402.51322.5132
H61.09942.18412.77643.61471.78401.78102.53973.0984
H71.09942.18412.77643.61471.78401.78103.09842.5397
H82.18291.10152.09123.16162.51322.53973.09841.7687
H92.18291.10152.09123.16162.51323.09842.53971.7687

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 112.480 C1 C2 H8 110.690
C1 C2 H9 110.690 C2 C1 H5 109.841
C2 C1 H6 110.914 C2 C1 H7 110.914
C2 C3 N4 179.148 C3 C2 H8 107.971
C3 C2 H9 107.971 H5 C1 H6 108.451
H5 C1 H7 108.451 H6 C1 H7 108.193
H8 C2 H9 106.818
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.042      
2 C -0.032      
3 C -0.108      
4 N -0.105      
5 H 0.038      
6 H 0.052      
7 H 0.052      
8 H 0.072      
9 H 0.072      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.126 3.111 0.000 3.768
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -27.053 -3.508 -0.009
y -3.508 -27.443 -0.007
z -0.009 -0.007 -23.915
Traceless
 xyz
x -1.374 -3.508 -0.009
y -3.508 -1.959 -0.007
z -0.009 -0.007 3.333
Polar
3z2-r26.667
x2-y20.390
xy-3.508
xz-0.009
yz-0.007


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.470 1.135 0.001
y 1.135 5.883 0.000
z 0.001 0.000 4.161


<r2> (average value of r2) Å2
<r2> 88.866
(<r2>)1/2 9.427