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

using model chemistry: PBE1PBE/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes Cs 1A'
Energy calculated at PBE1PBE/6-31+G**
 hartrees
Energy at 0K-171.867951
Energy at 298.15K 
HF Energy-171.867951
Nuclear repulsion energy102.851216
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 PBE1PBE/6-31+G**
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' 3169 3028 13.99 80.79 0.70 0.83
2 A' 3083 2945 11.41 31.70 0.25 0.41
3 A' 3080 2943 11.54 233.19 0.01 0.02
4 A' 2386 2279 13.09 86.70 0.20 0.34
5 A' 1506 1439 7.99 6.09 0.72 0.84
6 A' 1471 1406 7.05 11.73 0.74 0.85
7 A' 1420 1357 3.10 2.20 0.36 0.53
8 A' 1350 1289 2.95 3.69 0.62 0.77
9 A' 1099 1050 4.77 4.67 0.14 0.24
10 A' 1039 992 0.77 4.82 0.50 0.66
11 A' 856 818 0.04 4.81 0.13 0.23
12 A' 552 527 1.17 2.39 0.33 0.50
13 A' 212 203 3.91 3.37 0.74 0.85
14 A" 3175 3033 12.33 29.73 0.75 0.86
15 A" 3127 2988 0.38 92.44 0.75 0.86
16 A" 1500 1433 10.24 11.06 0.75 0.86
17 A" 1287 1229 0.02 4.94 0.75 0.86
18 A" 1111 1062 0.54 0.07 0.75 0.86
19 A" 790 755 4.14 0.43 0.75 0.86
20 A" 396 378 0.09 3.30 0.75 0.86
21 A" 224 214 0.85 0.80 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16416.7 cm-1
Scaled (by 0.9553) Zero Point Vibrational Energy (zpe) 15682.9 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 PBE1PBE/6-31+G**
ABC
0.93742 0.15634 0.14104

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/6-31+G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.512 0.568 0.000
C2 0.000 0.811 0.000
C3 -0.766 -0.433 0.000
N4 -1.364 -1.427 0.000
H5 2.040 1.526 0.000
H6 1.818 0.006 0.885
H7 1.818 0.006 -0.885
H8 -0.300 1.390 0.880
H9 -0.300 1.390 -0.880

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.53082.48833.50001.09341.09281.09282.17532.1753
C21.53081.46092.62072.16142.17622.17621.09581.0958
C32.48831.46091.15993.42212.76662.76662.07782.0778
N43.50002.62071.15994.50603.59993.59993.13773.1377
H51.09342.16143.42214.50601.77301.77302.50332.5033
H61.09282.17622.76663.59991.77301.77082.53023.0853
H71.09282.17622.76663.59991.77301.77083.08532.5302
H82.17531.09582.07783.13772.50332.53023.08531.7603
H92.17531.09582.07783.13772.50333.08532.53021.7603

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 112.534 C1 C2 H8 110.733
C1 C2 H9 110.733 C2 C1 H5 109.779
C2 C1 H6 110.986 C2 C1 H7 110.986
C2 C3 N4 179.369 C3 C2 H8 107.871
C3 C2 H9 107.871 H5 C1 H6 108.388
H5 C1 H7 108.388 H6 C1 H7 108.230
H8 C2 H9 106.873
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.526      
2 C -0.233      
3 C 0.238      
4 N -0.473      
5 H 0.182      
6 H 0.191      
7 H 0.191      
8 H 0.215      
9 H 0.215      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.362 3.449 0.000 4.180
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -27.442 -3.883 0.000
y -3.883 -27.895 0.000
z 0.000 0.000 -24.045
Traceless
 xyz
x -1.473 -3.883 0.000
y -3.883 -2.151 0.000
z 0.000 0.000 3.624
Polar
3z2-r27.247
x2-y20.452
xy-3.883
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.929 1.298 0.000
y 1.298 6.489 0.000
z 0.000 0.000 4.512


<r2> (average value of r2) Å2
<r2> 88.304
(<r2>)1/2 9.397