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

using model chemistry: B1B95/6-31+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 B1B95/6-31+G**
 hartrees
Energy at 0K-171.991695
Energy at 298.15K 
HF Energy-171.991695
Nuclear repulsion energy103.001769
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 B1B95/6-31+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' 3175 3037 15.41 80.97 0.70 0.83
2 A' 3090 2956 11.77 36.62 0.22 0.37
3 A' 3088 2954 12.88 227.45 0.01 0.02
4 A' 2391 2287 12.85 84.71 0.20 0.34
5 A' 1509 1444 7.30 6.15 0.73 0.84
6 A' 1475 1411 6.45 11.86 0.74 0.85
7 A' 1421 1360 2.37 2.18 0.36 0.53
8 A' 1350 1291 3.15 3.75 0.62 0.77
9 A' 1098 1050 4.46 4.69 0.14 0.24
10 A' 1037 992 0.71 5.10 0.49 0.66
11 A' 855 818 0.07 5.01 0.13 0.23
12 A' 549 525 1.11 2.35 0.33 0.50
13 A' 211 202 4.00 3.37 0.74 0.85
14 A" 3181 3043 13.89 29.66 0.75 0.86
15 A" 3134 2998 0.54 92.99 0.75 0.86
16 A" 1503 1438 9.54 11.17 0.75 0.86
17 A" 1287 1231 0.01 5.17 0.75 0.86
18 A" 1111 1063 0.49 0.07 0.75 0.86
19 A" 789 755 3.86 0.41 0.75 0.86
20 A" 395 378 0.13 3.28 0.75 0.86
21 A" 225 215 0.87 0.80 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16436.4 cm-1
Scaled (by 0.9566) Zero Point Vibrational Energy (zpe) 15723.1 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 B1B95/6-31+G**
ABC
0.94080 0.15669 0.14136

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-31+G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.510 0.568 0.000
C2 0.000 0.810 0.000
C3 -0.766 -0.433 0.000
N4 -1.362 -1.426 0.000
H5 2.036 1.524 0.000
H6 1.815 0.007 0.883
H7 1.815 0.007 -0.883
H8 -0.299 1.388 0.878
H9 -0.299 1.388 -0.878

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.52902.48603.49621.09071.09011.09012.17152.1715
C21.52901.45972.61762.15752.17252.17251.09301.0930
C32.48601.45971.15803.41732.76332.76332.07462.0746
N43.49622.61761.15804.49953.59583.59583.13293.1329
H51.09072.15753.41734.49951.76881.76882.49862.4986
H61.09012.17252.76333.59581.76881.76672.52543.0790
H71.09012.17252.76333.59581.76881.76673.07902.5254
H82.17151.09302.07463.13292.49862.52543.07901.7560
H92.17151.09302.07463.13292.49863.07902.52541.7560

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 112.550 C1 C2 H8 110.729
C1 C2 H9 110.729 C2 C1 H5 109.758
C2 C1 H6 110.981 C2 C1 H7 110.981
C2 C3 N4 179.368 C3 C2 H8 107.856
C3 C2 H9 107.856 H5 C1 H6 108.395
H5 C1 H7 108.395 H6 C1 H7 108.249
H8 C2 H9 106.894
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.498      
2 C -0.226      
3 C 0.258      
4 N -0.475      
5 H 0.172      
6 H 0.180      
7 H 0.180      
8 H 0.204      
9 H 0.204      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.351 3.430 0.000 4.158
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -27.367 -3.873 0.000
y -3.873 -27.835 0.000
z 0.000 0.000 -23.976
Traceless
 xyz
x -1.461 -3.873 0.000
y -3.873 -2.164 0.000
z 0.000 0.000 3.625
Polar
3z2-r27.249
x2-y20.469
xy-3.873
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.911 1.296 0.000
y 1.296 6.463 0.000
z 0.000 0.000 4.491


<r2> (average value of r2) Å2
<r2> 88.080
(<r2>)1/2 9.385