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

using model chemistry: BLYP/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes Cs 1A'
Energy calculated at BLYP/STO-3G
 hartrees
Energy at 0K-169.823770
Energy at 298.15K 
HF Energy-169.823770
Nuclear repulsion energy99.656514
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 BLYP/STO-3G
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' 3384 3131 0.60 34.81 0.72 0.84
2 A' 3223 2982 1.26 15.49 0.05 0.10
3 A' 3214 2974 0.05 77.81 0.06 0.11
4 A' 2261 2091 9.86 20.92 0.25 0.39
5 A' 1637 1515 3.86 9.42 0.74 0.85
6 A' 1584 1466 2.39 20.61 0.74 0.85
7 A' 1520 1407 0.43 4.01 0.74 0.85
8 A' 1403 1298 5.01 7.96 0.69 0.81
9 A' 1135 1050 4.63 2.49 0.21 0.35
10 A' 1035 958 0.61 5.96 0.50 0.66
11 A' 831 769 0.04 3.76 0.20 0.33
12 A' 520 481 1.01 0.94 0.27 0.42
13 A' 204 188 1.68 1.68 0.73 0.84
14 A" 3390 3136 0.61 18.42 0.75 0.86
15 A" 3310 3062 0.11 42.15 0.75 0.86
16 A" 1631 1509 4.23 17.64 0.75 0.86
17 A" 1335 1235 0.01 11.74 0.75 0.86
18 A" 1158 1072 0.37 0.65 0.75 0.86
19 A" 825 763 5.66 0.19 0.75 0.86
20 A" 359 332 0.06 1.57 0.75 0.86
21 A" 202 187 0.40 0.27 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 17080.7 cm-1
Scaled (by 0.9252) Zero Point Vibrational Energy (zpe) 15803.1 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 BLYP/STO-3G
ABC
0.88762 0.14599 0.13178

See section I.F.4 to change rotational constant units
Geometric Data calculated at BLYP/STO-3G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.557 0.597 0.000
C2 0.000 0.844 0.000
C3 -0.786 -0.450 0.000
N4 -1.406 -1.492 0.000
H5 2.083 1.573 0.000
H6 1.860 0.027 0.901
H7 1.860 0.027 -0.901
H8 -0.292 1.435 0.900
H9 -0.292 1.435 -0.900

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.57662.56673.62521.10861.10801.10802.22102.2210
C21.57661.51422.72632.20652.22202.22201.11571.1157
C32.56671.51421.21213.51052.83582.83582.14662.1466
N43.62522.72631.21214.64353.71273.71273.25843.2584
H51.10862.20653.51054.64351.80281.80282.54342.5434
H61.10802.22202.83583.71271.80281.80222.57153.1395
H71.10802.22202.83583.71271.80281.80223.13952.5715
H82.22101.11572.14663.25842.54342.57153.13951.8001
H92.22101.11572.14663.25842.54343.13952.57151.8001

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 112.266 C1 C2 H8 109.983
C1 C2 H9 109.983 C2 C1 H5 109.275
C2 C1 H6 110.507 C2 C1 H7 110.507
C2 C3 N4 179.448 C3 C2 H8 108.463
C3 C2 H9 108.463 H5 C1 H6 108.845
H5 C1 H7 108.845 H6 C1 H7 108.825
H8 C2 H9 107.548
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.205      
2 C -0.129      
3 C 0.058      
4 N -0.185      
5 H 0.084      
6 H 0.086      
7 H 0.086      
8 H 0.103      
9 H 0.103      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.743 2.548 0.000 3.087
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -24.764 -3.027 0.000
y -3.027 -25.285 0.000
z 0.000 0.000 -22.161
Traceless
 xyz
x -1.041 -3.027 0.000
y -3.027 -1.823 0.000
z 0.000 0.000 2.864
Polar
3z2-r25.728
x2-y20.521
xy-3.027
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.921 0.991 0.000
y 0.991 3.486 0.000
z 0.000 0.000 2.035


<r2> (average value of r2) Å2
<r2> 91.596
(<r2>)1/2 9.571