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

using model chemistry: B3PW91/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 B3PW91/cc-pVTZ
 hartrees
Energy at 0K-172.060985
Energy at 298.15K 
HF Energy-172.060985
Nuclear repulsion energy103.205055
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 B3PW91/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' 3132 3012 14.77      
2 A' 3056 2938 17.83      
3 A' 3052 2935 3.56      
4 A' 2363 2273 10.97      
5 A' 1499 1442 5.99      
6 A' 1465 1409 6.04      
7 A' 1411 1357 1.64      
8 A' 1343 1292 2.79      
9 A' 1091 1050 3.78      
10 A' 1026 986 0.38      
11 A' 848 815 0.05      
12 A' 552 531 0.85      
13 A' 212 204 4.01      
14 A" 3137 3017 13.96      
15 A" 3088 2969 0.63      
16 A" 1491 1434 7.71      
17 A" 1285 1235 0.02      
18 A" 1109 1066 0.42      
19 A" 787 757 4.06      
20 A" 393 378 0.26      
21 A" 219 210 0.98      

Unscaled Zero Point Vibrational Energy (zpe) 16279.1 cm-1
Scaled (by 0.9616) Zero Point Vibrational Energy (zpe) 15654.0 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 B3PW91/cc-pVTZ
ABC
0.94316 0.15729 0.14189

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.510 0.564 0.000
C2 0.000 0.806 0.000
C3 -0.767 -0.432 0.000
N4 -1.362 -1.418 0.000
H5 2.038 1.518 0.000
H6 1.815 0.002 0.882
H7 1.815 0.002 -0.882
H8 -0.298 1.386 0.877
H9 -0.298 1.386 -0.877

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.52962.48583.48931.09021.08961.08962.17122.1712
C21.52961.45672.60772.15902.17242.17241.09281.0928
C32.48581.45671.15103.41662.76312.76312.07252.0725
N43.48932.60771.15104.49193.58963.58963.12453.1245
H51.09022.15903.41664.49191.76801.76802.49892.4989
H61.08962.17242.76313.58961.76801.76492.52573.0781
H71.08962.17242.76313.58961.76801.76493.07812.5257
H82.17121.09282.07253.12452.49892.52573.07811.7542
H92.17121.09282.07253.12452.49893.07812.52571.7542

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 112.665 C1 C2 H8 110.676
C1 C2 H9 110.676 C2 C1 H5 109.859
C2 C1 H6 110.962 C2 C1 H7 110.962
C2 C3 N4 179.319 C3 C2 H8 107.912
C3 C2 H9 107.912 H5 C1 H6 108.403
H5 C1 H7 108.403 H6 C1 H7 108.169
H8 C2 H9 106.765
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.253      
2 C -0.142      
3 C -0.078      
4 N -0.076      
5 H 0.097      
6 H 0.106      
7 H 0.106      
8 H 0.120      
9 H 0.120      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.317 3.342 0.000 4.066
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -27.088 -3.750 0.000
y -3.750 -27.476 0.000
z 0.000 0.000 -23.755
Traceless
 xyz
x -1.472 -3.750 0.000
y -3.750 -2.055 0.000
z 0.000 0.000 3.528
Polar
3z2-r27.055
x2-y20.388
xy-3.750
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.129 1.184 0.000
y 1.184 6.391 0.000
z 0.000 0.000 4.641


<r2> (average value of r2) Å2
<r2> 87.663
(<r2>)1/2 9.363