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: HF/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 HF/6-311G**
 hartrees
Energy at 0K-171.005139
Energy at 298.15K 
HF Energy-171.005139
Nuclear repulsion energy103.587047
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 HF/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' 3252 2954 34.14 76.47 0.68 0.81
2 A' 3205 2912 7.71 126.52 0.09 0.16
3 A' 3181 2890 24.80 115.81 0.01 0.03
4 A' 2594 2357 14.48 55.76 0.24 0.38
5 A' 1620 1472 5.33 4.76 0.74 0.85
6 A' 1598 1452 4.15 13.49 0.75 0.86
7 A' 1542 1401 0.77 1.56 0.13 0.23
8 A' 1473 1338 5.20 2.01 0.48 0.65
9 A' 1185 1077 3.96 3.46 0.18 0.31
10 A' 1074 975 1.61 7.97 0.44 0.61
11 A' 882 802 2.95 6.02 0.15 0.26
12 A' 600 545 1.03 2.50 0.39 0.57
13 A' 236 215 5.56 3.05 0.73 0.84
14 A" 3262 2964 34.87 5.55 0.75 0.86
15 A" 3237 2941 0.14 121.01 0.75 0.86
16 A" 1613 1465 7.01 11.16 0.75 0.86
17 A" 1396 1269 0.03 5.03 0.75 0.86
18 A" 1214 1103 0.39 0.01 0.75 0.86
19 A" 850 772 2.58 0.43 0.75 0.86
20 A" 439 399 0.95 4.06 0.75 0.86
21 A" 241 219 1.13 0.58 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 17348.0 cm-1
Scaled (by 0.9085) Zero Point Vibrational Energy (zpe) 15760.6 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 HF/6-311G**
ABC
0.94472 0.15795 0.14240

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.511 0.561 0.000
C2 0.000 0.811 0.000
C3 -0.773 -0.441 0.000
N4 -1.357 -1.408 0.000
H5 2.037 1.509 0.000
H6 1.811 0.001 0.879
H7 1.811 0.001 -0.879
H8 -0.296 1.380 0.873
H9 -0.296 1.380 -0.873

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.53152.49353.47821.08431.08381.08382.16782.1678
C21.53151.47072.60022.15332.16922.16921.08401.0840
C32.49351.47071.12953.41972.76422.76422.07552.0755
N43.47822.60021.12954.47473.57643.57643.10833.1083
H51.08432.15333.41974.47471.75931.75932.49422.4942
H61.08382.16922.76423.57641.75931.75742.51773.0674
H71.08382.16922.76423.57641.75931.75743.06742.5177
H82.16781.08402.07553.10832.49422.51773.06741.7469
H92.16781.08402.07553.10832.49423.06742.51771.7469

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 112.295 C1 C2 H8 110.791
C1 C2 H9 110.791 C2 C1 H5 109.629
C2 C1 H6 110.920 C2 C1 H7 110.920
C2 C3 N4 179.463 C3 C2 H8 107.700
C3 C2 H9 107.700 H5 C1 H6 108.481
H5 C1 H7 108.481 H6 C1 H7 108.338
H8 C2 H9 107.361
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.235      
2 C -0.148      
3 C 0.101      
4 N -0.340      
5 H 0.106      
6 H 0.113      
7 H 0.113      
8 H 0.145      
9 H 0.145      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.384 3.464 0.000 4.205
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -27.580 -3.947 0.000
y -3.947 -27.975 0.000
z 0.000 0.000 -24.023
Traceless
 xyz
x -1.581 -3.947 0.000
y -3.947 -2.174 0.000
z 0.000 0.000 3.755
Polar
3z2-r27.510
x2-y20.395
xy-3.947
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.305 1.071 0.000
y 1.071 5.717 0.000
z 0.000 0.000 4.097


<r2> (average value of r2) Å2
<r2> 87.635
(<r2>)1/2 9.361