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

using model chemistry: MP2/6-311G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes Cs 1A'
Energy calculated at MP2/6-311G**
 hartrees
Energy at 0K-171.601824
Energy at 298.15K 
HF Energy-170.999889
Nuclear repulsion energy102.487681
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 MP2/6-311G**
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' 3187 3028 15.98 69.54 0.71 0.83
2 A' 3104 2949 7.68 95.03 0.09 0.16
3 A' 3092 2938 14.72 134.41 0.01 0.02
4 A' 2204 2094 0.44 40.08 0.25 0.40
5 A' 1526 1450 5.40 6.47 0.75 0.85
6 A' 1496 1422 4.62 12.37 0.74 0.85
7 A' 1434 1363 1.65 1.84 0.25 0.40
8 A' 1366 1298 2.71 2.50 0.54 0.70
9 A' 1111 1055 2.93 3.97 0.15 0.26
10 A' 1043 991 0.63 4.91 0.50 0.67
11 A' 854 812 0.13 5.06 0.13 0.22
12 A' 539 512 0.66 1.55 0.33 0.50
13 A' 208 198 3.52 2.55 0.73 0.85
14 A" 3191 3032 15.49 23.45 0.75 0.86
15 A" 3152 2995 0.78 91.66 0.75 0.86
16 A" 1521 1445 7.44 11.15 0.75 0.86
17 A" 1307 1242 0.00 5.23 0.75 0.86
18 A" 1128 1072 0.51 0.16 0.75 0.86
19 A" 799 759 2.36 0.27 0.75 0.86
20 A" 383 364 0.12 2.41 0.75 0.86
21 A" 231 219 0.78 0.66 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16436.4 cm-1
Scaled (by 0.9502) Zero Point Vibrational Energy (zpe) 15617.8 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 MP2/6-311G**
ABC
0.92069 0.15600 0.14039

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-311G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.512 0.563 0.000
C2 0.000 0.822 0.000
C3 -0.769 -0.426 0.000
N4 -1.363 -1.438 0.000
H5 2.052 1.513 0.000
H6 1.805 -0.005 0.886
H7 1.805 -0.005 -0.886
H8 -0.291 1.402 0.881
H9 -0.291 1.402 -0.881

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.53452.48653.50341.09241.09201.09202.17572.1757
C21.53451.46592.63982.16522.17382.17381.09411.0941
C32.48651.46591.17403.42292.75402.75402.08432.0843
N43.50342.63981.17404.51363.58783.58783.16093.1609
H51.09242.16523.42294.51361.77481.77482.50612.5061
H61.09202.17382.75403.58781.77481.77122.52443.0812
H71.09202.17382.75403.58781.77481.77123.08122.5244
H82.17571.09412.08433.16092.50612.52443.08121.7621
H92.17571.09412.08433.16092.50613.08122.52441.7621

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 111.911 C1 C2 H8 110.609
C1 C2 H9 110.609 C2 C1 H5 109.874
C2 C1 H6 110.586 C2 C1 H7 110.586
C2 C3 N4 178.761 C3 C2 H8 108.137
C3 C2 H9 108.137 H5 C1 H6 108.675
H5 C1 H7 108.675 H6 C1 H7 108.388
H8 C2 H9 107.276
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability