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

using model chemistry: mPW1PW91/aug-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 mPW1PW91/aug-cc-pVDZ
 hartrees
Energy at 0K-172.040635
Energy at 298.15K 
HF Energy-172.040635
Nuclear repulsion energy102.828829
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 mPW1PW91/aug-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' 3166 3034 15.47 68.41 0.70 0.82
2 A' 3080 2952 8.97 72.93 0.09 0.17
3 A' 3076 2948 13.83 228.16 0.00 0.01
4 A' 2375 2276 12.55 91.96 0.17 0.29
5 A' 1482 1420 5.62 2.94 0.73 0.84
6 A' 1449 1389 5.86 7.79 0.68 0.81
7 A' 1400 1341 1.80 0.81 0.41 0.58
8 A' 1334 1279 3.67 2.67 0.41 0.58
9 A' 1093 1047 3.32 6.38 0.13 0.23
10 A' 1040 996 0.76 2.71 0.53 0.69
11 A' 856 820 0.08 5.88 0.07 0.12
12 A' 548 525 0.85 1.46 0.16 0.27
13 A' 211 202 4.32 2.06 0.72 0.84
14 A" 3170 3038 14.55 24.59 0.75 0.86
15 A" 3125 2994 0.55 81.75 0.75 0.86
16 A" 1475 1413 7.86 5.17 0.75 0.86
17 A" 1277 1223 0.01 1.94 0.75 0.86
18 A" 1101 1055 0.47 0.11 0.75 0.86
19 A" 782 749 3.59 0.41 0.75 0.86
20 A" 390 373 0.33 1.32 0.75 0.86
21 A" 220 211 1.05 0.35 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16323.7 cm-1
Scaled (by 0.9583) Zero Point Vibrational Energy (zpe) 15643.0 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 mPW1PW91/aug-cc-pVDZ
ABC
0.93811 0.15625 0.14101

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/aug-cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.511 0.571 0.000
C2 0.000 0.809 0.000
C3 -0.767 -0.434 0.000
N4 -1.362 -1.429 0.000
H5 2.036 1.533 0.000
H6 1.819 0.008 0.888
H7 1.819 0.008 -0.888
H8 -0.301 1.390 0.882
H9 -0.301 1.390 -0.882

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.52962.48983.50041.09571.09541.09542.17542.1754
C21.52961.46122.62002.16052.17672.17671.09801.0980
C32.48981.46121.15893.42412.76932.76932.07902.0790
N43.50042.62001.15894.50743.60123.60123.13813.1381
H51.09572.16053.42414.50741.77791.77792.50212.5021
H61.09542.17672.76933.60121.77791.77542.53063.0881
H71.09542.17672.76933.60121.77791.77543.08812.5306
H82.17541.09802.07903.13812.50212.53063.08811.7642
H92.17541.09802.07903.13812.50213.08812.53061.7642

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 112.692 C1 C2 H8 110.696
C1 C2 H9 110.696 C2 C1 H5 109.652
C2 C1 H6 110.957 C2 C1 H7 110.957
C2 C3 N4 179.236 C3 C2 H8 107.812
C3 C2 H9 107.812 H5 C1 H6 108.464
H5 C1 H7 108.464 H6 C1 H7 108.270
H8 C2 H9 106.900
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/aug-cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.420      
2 C 0.400      
3 C -0.041      
4 N -0.323      
5 H -0.116      
6 H -0.095      
7 H -0.095      
8 H -0.075      
9 H -0.075      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.368 3.441 0.000 4.177
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -27.353 -3.861 0.000
y -3.861 -27.835 0.000
z 0.000 0.000 -23.945
Traceless
 xyz
x -1.463 -3.861 0.000
y -3.861 -2.186 0.000
z 0.000 0.000 3.649
Polar
3z2-r27.298
x2-y20.482
xy-3.861
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.616 1.203 0.000
y 1.203 6.850 0.000
z 0.000 0.000 5.086


<r2> (average value of r2) Å2
<r2> 88.282
(<r2>)1/2 9.396