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

using model chemistry: B2PLYP=FULL/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 B2PLYP=FULL/6-311G*
 hartrees
Energy at 0K-171.942376
Energy at 298.15K 
HF Energy-171.729332
Nuclear repulsion energy102.798093
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 B2PLYP=FULL/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' 3153 3153 22.88 75.94 0.71 0.83
2 A' 3082 3082 10.13 89.93 0.10 0.19
3 A' 3077 3077 18.76 138.87 0.01 0.02
4 A' 2296 2296 1.94 55.46 0.25 0.40
5 A' 1539 1539 7.58 6.66 0.74 0.85
6 A' 1510 1510 5.59 13.95 0.73 0.85
7 A' 1447 1447 2.53 1.96 0.29 0.45
8 A' 1375 1375 2.70 3.91 0.55 0.71
9 A' 1111 1111 4.38 3.08 0.15 0.26
10 A' 1031 1031 0.69 5.82 0.46 0.63
11 A' 848 848 0.28 4.95 0.15 0.25
12 A' 550 550 0.90 1.93 0.32 0.49
13 A' 214 214 3.85 2.81 0.73 0.84
14 A" 3160 3160 23.05 26.67 0.75 0.86
15 A" 3118 3118 1.64 98.85 0.75 0.86
16 A" 1533 1533 9.19 12.43 0.75 0.86
17 A" 1316 1316 0.02 5.81 0.75 0.86
18 A" 1138 1138 0.31 0.07 0.75 0.86
19 A" 802 802 3.47 0.35 0.75 0.86
20 A" 392 392 0.18 2.92 0.75 0.86
21 A" 228 228 0.84 0.62 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16460.7 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 16460.7 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 B2PLYP=FULL/6-311G*
ABC
0.93388 0.15615 0.14075

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.514 0.565 0.000
C2 0.000 0.813 0.000
C3 -0.770 -0.432 0.000
N4 -1.366 -1.427 0.000
H5 2.047 1.517 0.000
H6 1.818 0.002 0.883
H7 1.818 0.002 -0.883
H8 -0.294 1.395 0.877
H9 -0.294 1.395 -0.877

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.53442.49183.50191.09071.09001.09002.17412.1741
C21.53441.46382.62382.16452.17722.17721.09251.0925
C32.49181.46381.16013.42502.76782.76782.08152.0815
N43.50192.62381.16014.50713.59963.59963.14353.1435
H51.09072.16453.42504.50711.76791.76792.50272.5027
H61.09002.17722.76783.59961.76791.76562.52933.0812
H71.09002.17722.76783.59961.76791.76563.08122.5293
H82.17411.09252.08153.14352.50272.52933.08121.7537
H92.17411.09252.08153.14352.50273.08122.52931.7537

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 112.409 C1 C2 H8 110.584
C1 C2 H9 110.584 C2 C1 H5 109.933
C2 C1 H6 110.988 C2 C1 H7 110.988
C2 C3 N4 179.220 C3 C2 H8 108.148
C3 C2 H9 108.148 H5 C1 H6 108.333
H5 C1 H7 108.333 H6 C1 H7 108.176
H8 C2 H9 106.758
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability