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

using model chemistry: mPW1PW91/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 mPW1PW91/aug-cc-pVTZ
 hartrees
Energy at 0K-172.083321
Energy at 298.15K 
HF Energy-172.083321
Nuclear repulsion energy103.380117
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-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 3017 13.70 67.10 0.69 0.82
2 A' 3071 2943 16.02 30.14 0.10 0.18
3 A' 3069 2940 3.81 269.40 0.02 0.03
4 A' 2381 2281 12.91 93.81 0.16 0.27
5 A' 1505 1442 6.06 2.85 0.73 0.84
6 A' 1471 1409 6.21 7.80 0.67 0.80
7 A' 1417 1357 1.72 0.50 0.51 0.68
8 A' 1351 1295 3.15 2.82 0.43 0.60
9 A' 1098 1052 3.82 5.19 0.12 0.21
10 A' 1034 991 0.41 3.62 0.43 0.60
11 A' 854 818 0.06 5.74 0.07 0.13
12 A' 556 533 0.87 1.40 0.16 0.27
13 A' 213 204 4.44 1.95 0.71 0.83
14 A" 3153 3021 12.47 24.34 0.75 0.86
15 A" 3106 2975 0.30 80.23 0.75 0.86
16 A" 1497 1434 8.12 4.98 0.75 0.86
17 A" 1292 1238 0.01 1.87 0.75 0.86
18 A" 1114 1068 0.42 0.10 0.75 0.86
19 A" 789 756 3.99 0.40 0.75 0.86
20 A" 397 381 0.43 1.27 0.75 0.86
21 A" 217 208 1.07 0.29 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16366.8 cm-1
Scaled (by 0.9581) Zero Point Vibrational Energy (zpe) 15681.0 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-pVTZ
ABC
0.94492 0.15792 0.14242

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.507 0.562 0.000
C2 0.000 0.806 0.000
C3 -0.766 -0.431 0.000
N4 -1.358 -1.415 0.000
H5 2.035 1.515 0.000
H6 1.811 0.001 0.881
H7 1.811 0.001 -0.881
H8 -0.297 1.385 0.876
H9 -0.297 1.385 -0.876

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.52682.48123.48191.08871.08831.08832.16792.1679
C21.52681.45512.60352.15462.16892.16891.09131.0913
C32.48121.45511.14853.41062.75802.75802.07012.0701
N43.48192.60351.14854.48313.58163.58163.12003.1200
H51.08872.15463.41064.48311.76601.76602.49432.4943
H61.08832.16892.75803.58161.76601.76282.52193.0738
H71.08832.16892.75803.58161.76601.76283.07382.5219
H82.16791.09132.07013.12002.49432.52193.07381.7519
H92.16791.09132.07013.12002.49433.07382.52191.7519

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 112.611 C1 C2 H8 110.700
C1 C2 H9 110.700 C2 C1 H5 109.801
C2 C1 H6 110.963 C2 C1 H7 110.963
C2 C3 N4 179.252 C3 C2 H8 107.918
C3 C2 H9 107.918 H5 C1 H6 108.431
H5 C1 H7 108.431 H6 C1 H7 108.171
H8 C2 H9 106.762
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.611      
2 C -0.060      
3 C 0.261      
4 N -0.556      
5 H 0.196      
6 H 0.208      
7 H 0.208      
8 H 0.178      
9 H 0.178      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.367 3.421 0.000 4.160
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -27.260 -3.849 0.000
y -3.849 -27.703 0.000
z 0.000 0.000 -23.851
Traceless
 xyz
x -1.483 -3.849 0.000
y -3.849 -2.147 0.000
z 0.000 0.000 3.630
Polar
3z2-r27.261
x2-y20.443
xy-3.849
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.585 1.161 0.000
y 1.161 6.768 0.000
z 0.000 0.000 5.070


<r2> (average value of r2) Å2
<r2> 87.505
(<r2>)1/2 9.354