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

using model chemistry: MP2=FULL/6-31G

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=FULL/6-31G
 hartrees
Energy at 0K-171.279735
Energy at 298.15K 
HF Energy-170.875879
Nuclear repulsion energy101.107394
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=FULL/6-31G
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' 3165 3007 22.88 66.00 0.72 0.84
2 A' 3076 2923 18.80 85.17 0.01 0.03
3 A' 3073 2920 9.08 110.41 0.08 0.15
4 A' 2104 1999 1.86 24.85 0.28 0.44
5 A' 1577 1498 6.75 11.31 0.74 0.85
6 A' 1556 1478 5.32 22.55 0.72 0.84
7 A' 1491 1417 2.20 2.56 0.74 0.85
8 A' 1411 1340 1.39 6.49 0.67 0.81
9 A' 1134 1077 5.40 2.96 0.22 0.36
10 A' 1035 983 0.52 7.24 0.45 0.62
11 A' 831 790 0.30 6.45 0.18 0.30
12 A' 510 485 1.56 1.52 0.35 0.51
13 A' 188 179 2.77 3.12 0.74 0.85
14 A" 3170 3012 22.98 29.77 0.75 0.86
15 A" 3116 2961 4.10 85.25 0.75 0.86
16 A" 1570 1492 7.38 22.17 0.75 0.86
17 A" 1335 1269 0.01 11.81 0.75 0.86
18 A" 1170 1112 0.70 0.20 0.75 0.86
19 A" 824 783 3.03 0.23 0.75 0.86
20 A" 341 324 0.00 2.80 0.75 0.86
21 A" 214 203 0.73 1.36 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16446.3 cm-1
Scaled (by 0.9501) Zero Point Vibrational Energy (zpe) 15625.6 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=FULL/6-31G
ABC
0.91162 0.15071 0.13594

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.533 0.585 0.000
C2 0.000 0.828 0.000
C3 -0.777 -0.434 0.000
N4 -1.384 -1.470 0.000
H5 2.060 1.547 0.000
H6 1.837 0.020 0.890
H7 1.837 0.020 -0.890
H8 -0.287 1.417 0.883
H9 -0.287 1.417 -0.883

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.55182.52463.56811.09751.09701.09702.18732.1873
C21.55181.48222.68302.18222.19512.19511.09991.0999
C32.52461.48221.20093.46082.79862.79862.10892.1089
N43.56812.68301.20094.57933.65903.65903.21273.2127
H51.09752.18223.46084.57931.78151.78152.51142.5114
H61.09702.19512.79863.65901.78151.77992.54223.0995
H71.09702.19512.79863.65901.78151.77993.09952.5422
H82.18731.09992.10893.21272.51142.54223.09951.7667
H92.18731.09992.10893.21272.51143.09952.54221.7667

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 112.611 C1 C2 H8 109.982
C1 C2 H9 109.982 C2 C1 H5 109.720
C2 C1 H6 110.768 C2 C1 H7 110.768
C2 C3 N4 178.722 C3 C2 H8 108.614
C3 C2 H9 108.614 H5 C1 H6 108.544
H5 C1 H7 108.544 H6 C1 H7 108.433
H8 C2 H9 106.856
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability