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

using model chemistry: B3LYP/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes Cs 1A'
Energy calculated at B3LYP/3-21G
 hartrees
Energy at 0K-171.128856
Energy at 298.15K 
HF Energy-171.128856
Nuclear repulsion energy102.457137
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 B3LYP/3-21G
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' 3138 3028 16.64 66.01 0.72 0.83
2 A' 3069 2961 15.92 70.68 0.02 0.03
3 A' 3062 2955 4.03 116.85 0.08 0.14
4 A' 2350 2268 2.83 43.42 0.29 0.45
5 A' 1569 1514 7.74 14.63 0.74 0.85
6 A' 1536 1482 8.51 21.18 0.70 0.83
7 A' 1467 1415 4.45 2.61 0.75 0.86
8 A' 1381 1332 1.26 9.25 0.68 0.81
9 A' 1124 1085 8.22 1.74 0.15 0.26
10 A' 1002 967 0.27 6.88 0.41 0.58
11 A' 842 813 0.03 5.37 0.21 0.34
12 A' 595 574 1.94 2.10 0.36 0.53
13 A' 242 234 2.37 2.51 0.72 0.84
14 A" 3145 3035 15.84 24.69 0.75 0.86
15 A" 3094 2985 0.97 90.44 0.75 0.86
16 A" 1564 1509 9.04 23.51 0.75 0.86
17 A" 1342 1295 0.02 10.85 0.75 0.86
18 A" 1161 1120 0.92 0.20 0.75 0.86
19 A" 822 793 5.53 0.58 0.75 0.86
20 A" 456 440 0.08 3.49 0.75 0.86
21 A" 227 219 0.51 0.29 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16593.5 cm-1
Scaled (by 0.9649) Zero Point Vibrational Energy (zpe) 16011.1 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 B3LYP/3-21G
ABC
0.91604 0.15587 0.14022

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.528 0.544 0.000
C2 0.000 0.818 0.000
C3 -0.776 -0.421 0.000
N4 -1.381 -1.415 0.000
H5 2.071 1.495 0.000
H6 1.814 -0.025 0.889
H7 1.814 -0.025 -0.889
H8 -0.274 1.406 0.884
H9 -0.274 1.406 -0.884

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.55242.49773.50721.09421.09351.09352.18492.1849
C21.55241.46102.62502.17842.18902.18901.09701.0970
C32.49771.46101.16413.43052.76682.76682.09042.0904
N43.50722.62501.16414.51413.59603.59603.15683.1568
H51.09422.17843.43054.51411.77881.77882.50762.5076
H61.09352.18902.76683.59601.77881.77752.53213.0909
H71.09352.18902.76683.59601.77881.77753.09092.5321
H82.18491.09702.09043.15682.50762.53213.09091.7680
H92.18491.09702.09043.15682.50763.09092.53211.7680

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 111.929 C1 C2 H8 109.922
C1 C2 H9 109.922 C2 C1 H5 109.572
C2 C1 H6 110.445 C2 C1 H7 110.445
C2 C3 N4 179.246 C3 C2 H8 108.783
C3 C2 H9 108.783 H5 C1 H6 108.800
H5 C1 H7 108.800 H6 C1 H7 108.738
H8 C2 H9 107.383
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.542      
2 C -0.459      
3 C 0.349      
4 N -0.480      
5 H 0.204      
6 H 0.214      
7 H 0.214      
8 H 0.250      
9 H 0.250      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.127 3.004 0.000 3.681
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.810 -3.572 0.000
y -3.572 -27.252 0.000
z 0.000 0.000 -23.723
Traceless
 xyz
x -1.323 -3.572 0.000
y -3.572 -1.985 0.000
z 0.000 0.000 3.308
Polar
3z2-r26.616
x2-y20.442
xy-3.572
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.812 1.155 0.000
y 1.155 5.316 0.000
z 0.000 0.000 3.638


<r2> (average value of r2) Å2
<r2> 88.381
(<r2>)1/2 9.401