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

using model chemistry: B1B95/aug-cc-pVTZ

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/aug-cc-pVTZ
 hartrees
Energy at 0K-172.041035
Energy at 298.15K 
HF Energy-172.041035
Nuclear repulsion energy103.529016
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/aug-cc-pVTZ
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' 3155 3024 14.46 68.21 0.69 0.82
2 A' 3077 2949 15.87 16.77 0.26 0.42
3 A' 3074 2947 4.84 286.16 0.01 0.03
4 A' 2385 2286 12.70 92.27 0.16 0.27
5 A' 1505 1442 5.70 2.88 0.73 0.84
6 A' 1470 1409 5.89 7.93 0.67 0.81
7 A' 1414 1355 1.48 0.50 0.50 0.67
8 A' 1348 1292 3.18 2.85 0.42 0.60
9 A' 1096 1050 3.57 5.50 0.12 0.21
10 A' 1035 992 0.43 3.56 0.45 0.62
11 A' 853 818 0.07 5.90 0.07 0.13
12 A' 553 530 0.83 1.37 0.16 0.28
13 A' 212 203 4.44 1.96 0.70 0.83
14 A" 3159 3028 13.29 24.59 0.75 0.86
15 A" 3112 2983 0.36 81.80 0.75 0.86
16 A" 1497 1435 7.79 5.09 0.75 0.86
17 A" 1289 1235 0.00 1.96 0.75 0.86
18 A" 1111 1065 0.40 0.10 0.75 0.86
19 A" 785 753 3.71 0.39 0.75 0.86
20 A" 397 380 0.44 1.26 0.75 0.86
21 A" 218 209 1.08 0.29 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16370.5 cm-1
Scaled (by 0.9585) Zero Point Vibrational Energy (zpe) 15691.1 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/aug-cc-pVTZ
ABC
0.94656 0.15844 0.14286

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.505 0.561 0.000
C2 0.000 0.806 0.000
C3 -0.765 -0.430 0.000
N4 -1.356 -1.414 0.000
H5 2.032 1.511 0.000
H6 1.806 0.000 0.880
H7 1.806 0.000 -0.880
H8 -0.296 1.383 0.874
H9 -0.296 1.383 -0.874

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.52442.47673.47601.08661.08621.08622.16442.1644
C21.52441.45372.60102.15112.16482.16481.08921.0892
C32.47671.45371.14733.40492.75172.75172.06742.0674
N43.47602.60101.14734.47593.57403.57403.11653.1165
H51.08662.15113.40494.47591.76291.76292.49062.4906
H61.08622.16482.75173.57401.76291.75972.51703.0680
H71.08622.16482.75173.57401.76291.75973.06802.5170
H82.16441.08922.06743.11652.49062.51703.06801.7490
H92.16441.08922.06743.11652.49063.06802.51701.7490

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 112.519 C1 C2 H8 110.713
C1 C2 H9 110.713 C2 C1 H5 109.809
C2 C1 H6 110.923 C2 C1 H7 110.923
C2 C3 N4 179.236 C3 C2 H8 107.929
C3 C2 H9 107.929 H5 C1 H6 108.456
H5 C1 H7 108.456 H6 C1 H7 108.196
H8 C2 H9 106.812
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.998      
2 C -0.167      
3 C 0.135      
4 N -0.485      
5 H 0.301      
6 H 0.314      
7 H 0.314      
8 H 0.293      
9 H 0.293      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.353 3.401 0.000 4.135
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -27.238 -3.823 0.000
y -3.823 -27.689 0.000
z 0.000 0.000 -23.853
Traceless
 xyz
x -1.467 -3.823 0.000
y -3.823 -2.143 0.000
z 0.000 0.000 3.610
Polar
3z2-r27.220
x2-y20.451
xy-3.823
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.585 1.160 0.000
y 1.160 6.767 0.000
z 0.000 0.000 5.068


<r2> (average value of r2) Å2
<r2> 87.274
(<r2>)1/2 9.342