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

using model chemistry: mPW1PW91/daug-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 mPW1PW91/daug-cc-pVTZ
 hartrees
Energy at 0K-172.083541
Energy at 298.15K 
HF Energy-172.083541
Nuclear repulsion energy103.368349
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/daug-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' 3149 3149 13.64 66.56 0.70 0.82
2 A' 3071 3071 15.06 15.83 0.29 0.45
3 A' 3069 3069 4.78 284.88 0.01 0.02
4 A' 2381 2381 12.68 93.57 0.15 0.26
5 A' 1505 1505 6.05 2.83 0.73 0.84
6 A' 1471 1471 6.21 7.76 0.67 0.80
7 A' 1417 1417 1.75 0.48 0.52 0.68
8 A' 1350 1350 3.11 2.81 0.43 0.60
9 A' 1098 1098 3.83 5.17 0.12 0.21
10 A' 1033 1033 0.42 3.67 0.43 0.60
11 A' 853 853 0.06 5.75 0.07 0.12
12 A' 555 555 0.88 1.37 0.15 0.27
13 A' 213 213 4.42 1.90 0.70 0.83
14 A" 3153 3153 12.44 23.89 0.75 0.86
15 A" 3107 3107 0.27 80.49 0.75 0.86
16 A" 1497 1497 8.13 4.97 0.75 0.86
17 A" 1291 1291 0.01 1.86 0.75 0.86
18 A" 1114 1114 0.42 0.10 0.75 0.86
19 A" 789 789 3.95 0.39 0.75 0.86
20 A" 396 396 0.42 1.21 0.75 0.86
21 A" 218 218 1.08 0.28 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16365.4 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 16365.4 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/daug-cc-pVTZ
ABC
0.94435 0.15789 0.14239

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.508 0.562 0.000
C2 0.000 0.806 0.000
C3 -0.766 -0.431 0.000
N4 -1.359 -1.415 0.000
H5 2.036 1.514 0.000
H6 1.811 0.001 0.881
H7 1.811 0.001 -0.881
H8 -0.297 1.384 0.876
H9 -0.297 1.384 -0.876

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.52722.48143.48211.08881.08821.08822.16842.1684
C21.52721.45582.60422.15532.16902.16901.09121.0912
C32.48141.45581.14843.41122.75742.75742.07012.0701
N43.48212.60421.14844.48373.58133.58133.11983.1198
H51.08882.15533.41124.48371.76601.76602.49572.4957
H61.08822.16902.75743.58131.76601.76292.52173.0739
H71.08822.16902.75743.58131.76601.76293.07392.5217
H82.16841.09122.07013.11982.49572.52173.07391.7527
H92.16841.09122.07013.11982.49573.07392.52171.7527

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 112.557 C1 C2 H8 110.719
C1 C2 H9 110.719 C2 C1 H5 109.822
C2 C1 H6 110.940 C2 C1 H7 110.940
C2 C3 N4 179.298 C3 C2 H8 107.880
C3 C2 H9 107.880 H5 C1 H6 108.432
H5 C1 H7 108.432 H6 C1 H7 108.194
H8 C2 H9 106.859
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/daug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.743      
2 C -0.026      
3 C 0.767      
4 N -1.254      
5 H 0.259      
6 H 0.207      
7 H 0.207      
8 H 0.292      
9 H 0.292      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.367 3.418 0.000 4.158
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -27.261 -3.844 0.000
y -3.844 -27.698 0.000
z 0.000 0.000 -23.851
Traceless
 xyz
x -1.486 -3.844 0.000
y -3.844 -2.142 0.000
z 0.000 0.000 3.628
Polar
3z2-r27.257
x2-y20.437
xy-3.844
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.593 1.155 0.000
y 1.155 6.768 0.000
z 0.000 0.000 5.081


<r2> (average value of r2) Å2
<r2> 87.517
(<r2>)1/2 9.355