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

using model chemistry: HF/6-311+G(3df,2p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes Cs 1A'
Energy calculated at HF/6-311+G(3df,2p)
 hartrees
Energy at 0K-171.021266
Energy at 298.15K 
HF Energy-171.021266
Nuclear repulsion energy103.740830
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 HF/6-311+G(3df,2p)
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' 3243 2947 30.03 67.04 0.66 0.79
2 A' 3197 2905 6.02 129.04 0.06 0.12
3 A' 3175 2885 21.59 136.16 0.01 0.02
4 A' 2582 2346 18.79 77.98 0.14 0.24
5 A' 1621 1473 5.01 1.86 0.70 0.82
6 A' 1599 1453 4.24 7.63 0.74 0.85
7 A' 1543 1402 0.68 0.75 0.24 0.38
8 A' 1472 1337 6.26 2.03 0.38 0.55
9 A' 1183 1075 4.04 4.66 0.11 0.21
10 A' 1069 972 1.27 6.51 0.41 0.58
11 A' 879 798 2.74 7.06 0.08 0.15
12 A' 600 545 1.16 1.75 0.21 0.35
13 A' 236 214 6.16 2.06 0.70 0.82
14 A" 3253 2956 28.81 5.79 0.75 0.86
15 A" 3227 2932 0.20 97.16 0.75 0.86
16 A" 1613 1466 6.93 5.08 0.75 0.86
17 A" 1395 1267 0.01 2.01 0.75 0.86
18 A" 1213 1103 0.26 0.01 0.75 0.86
19 A" 849 771 2.62 0.40 0.75 0.86
20 A" 437 397 1.54 1.99 0.75 0.86
21 A" 240 218 1.43 0.33 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 17312.9 cm-1
Scaled (by 0.9086) Zero Point Vibrational Energy (zpe) 15730.5 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 HF/6-311+G(3df,2p)
ABC
0.94671 0.15841 0.14279

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/6-311+G(3df,2p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.509 0.559 0.000
C2 0.000 0.810 0.000
C3 -0.772 -0.441 0.000
N4 -1.355 -1.405 0.000
H5 2.034 1.506 0.000
H6 1.808 0.001 0.877
H7 1.808 0.001 -0.877
H8 -0.296 1.379 0.872
H9 -0.296 1.379 -0.872

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.52972.49073.47291.08221.08181.08182.16532.1653
C21.52971.46992.59672.14992.16632.16631.08221.0822
C32.49071.46991.12683.41522.76052.76052.07312.0731
N43.47292.59671.12684.46753.57063.57063.10363.1036
H51.08222.14993.41524.46751.75611.75612.49112.4911
H61.08182.16632.76053.57061.75611.75392.51463.0631
H71.08182.16632.76053.57061.75611.75393.06312.5146
H82.16531.08222.07313.10362.49112.51463.06311.7442
H92.16531.08222.07313.10362.49113.06312.51461.7442

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 112.247 C1 C2 H8 110.828
C1 C2 H9 110.828 C2 C1 H5 109.609
C2 C1 H6 110.930 C2 C1 H7 110.930
C2 C3 N4 179.463 C3 C2 H8 107.676
C3 C2 H9 107.676 H5 C1 H6 108.492
H5 C1 H7 108.492 H6 C1 H7 108.316
H8 C2 H9 107.383
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-311+G(3df,2p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.501      
2 C -0.113      
3 C 0.981      
4 N -1.117      
5 H 0.132      
6 H 0.150      
7 H 0.150      
8 H 0.159      
9 H 0.159      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.466 3.572 0.000 4.341
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -27.652 -4.036 0.000
y -4.036 -28.106 0.000
z 0.000 0.000 -24.100
Traceless
 xyz
x -1.549 -4.036 0.000
y -4.036 -2.230 0.000
z 0.000 0.000 3.779
Polar
3z2-r27.559
x2-y20.454
xy-4.036
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.075 1.036 0.000
y 1.036 6.267 0.000
z 0.000 0.000 4.764


<r2> (average value of r2) Å2
<r2> 87.494
(<r2>)1/2 9.354