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

using model chemistry: HF/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 HF/6-31G**
 hartrees
Energy at 0K-170.970582
Energy at 298.15K 
HF Energy-170.970582
Nuclear repulsion energy103.415528
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/6-31G**
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' 3278 2959 30.42 76.44 0.70 0.83
2 A' 3222 2908 8.21 116.13 0.10 0.18
3 A' 3202 2890 24.31 102.58 0.02 0.03
4 A' 2614 2359 14.12 50.32 0.28 0.43
5 A' 1630 1471 4.19 8.08 0.73 0.84
6 A' 1606 1449 3.58 18.68 0.74 0.85
7 A' 1554 1402 0.62 1.74 0.47 0.64
8 A' 1480 1336 4.99 3.35 0.53 0.70
9 A' 1190 1074 4.74 3.78 0.19 0.32
10 A' 1078 973 1.75 8.25 0.47 0.64
11 A' 887 801 3.04 6.28 0.18 0.31
12 A' 597 539 1.12 2.53 0.45 0.62
13 A' 234 212 5.93 3.14 0.72 0.84
14 A" 3287 2967 31.32 11.43 0.75 0.86
15 A" 3260 2943 0.17 117.22 0.75 0.86
16 A" 1623 1465 5.83 18.38 0.75 0.86
17 A" 1399 1263 0.01 7.42 0.75 0.86
18 A" 1219 1100 0.23 0.06 0.75 0.86
19 A" 853 770 2.82 0.44 0.75 0.86
20 A" 435 393 1.25 4.64 0.75 0.86
21 A" 240 217 1.32 0.61 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 17443.6 cm-1
Scaled (by 0.9026) Zero Point Vibrational Energy (zpe) 15744.6 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/6-31G**
ABC
0.94265 0.15744 0.14193

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.511 0.563 0.000
C2 0.000 0.813 0.000
C3 -0.772 -0.441 0.000
N4 -1.358 -1.413 0.000
H5 2.037 1.511 0.000
H6 1.812 0.005 0.878
H7 1.812 0.005 -0.878
H8 -0.295 1.383 0.873
H9 -0.295 1.383 -0.873

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.53182.49423.48421.08391.08341.08342.16792.1679
C21.53181.47262.60782.15332.16972.16971.08421.0842
C32.49421.47261.13523.42062.76502.76502.07842.0784
N43.48422.60781.13524.48103.58213.58213.11683.1168
H51.08392.15333.42064.48101.75821.75822.49382.4938
H61.08342.16972.76503.58211.75821.75692.51833.0676
H71.08342.16972.76503.58211.75821.75693.06762.5183
H82.16791.08422.07843.11682.49382.51833.06761.7465
H92.16791.08422.07843.11682.49383.06762.51831.7465

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 112.215 C1 C2 H8 110.772
C1 C2 H9 110.772 C2 C1 H5 109.629
C2 C1 H6 110.963 C2 C1 H7 110.963
C2 C3 N4 179.502 C3 C2 H8 107.789
C3 C2 H9 107.789 H5 C1 H6 108.432
H5 C1 H7 108.432 H6 C1 H7 108.344
H8 C2 H9 107.308
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.338      
2 C -0.262      
3 C 0.292      
4 N -0.460      
5 H 0.133      
6 H 0.142      
7 H 0.142      
8 H 0.176      
9 H 0.176      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.359 3.442 0.000 4.172
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -27.385 -3.961 0.000
y -3.961 -27.870 0.000
z 0.000 0.000 -23.898
Traceless
 xyz
x -1.501 -3.961 0.000
y -3.961 -2.228 0.000
z 0.000 0.000 3.730
Polar
3z2-r27.459
x2-y20.485
xy-3.961
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.998 1.100 0.000
y 1.100 5.539 0.000
z 0.000 0.000 3.912


<r2> (average value of r2) Å2
<r2> 87.757
(<r2>)1/2 9.368