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

using model chemistry: MP2=FULL/aug-cc-pVDZ

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/aug-cc-pVDZ
 hartrees
Energy at 0K-171.582021
Energy at 298.15K 
HF Energy-170.977209
Nuclear repulsion energy101.944393
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/aug-cc-pVDZ
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' 3184 3086 14.93 63.38 0.70 0.82
2 A' 3096 3000 7.27 110.77 0.06 0.11
3 A' 3085 2990 14.83 182.38 0.00 0.01
4 A' 2171 2104 0.02 62.07 0.16 0.28
5 A' 1497 1451 4.33 2.68 0.74 0.85
6 A' 1466 1420 4.50 7.53 0.72 0.83
7 A' 1402 1359 1.28 0.88 0.26 0.41
8 A' 1334 1293 3.78 2.13 0.37 0.54
9 A' 1095 1061 2.68 7.39 0.12 0.21
10 A' 1036 1004 0.60 3.22 0.56 0.72
11 A' 849 823 0.09 7.01 0.06 0.11
12 A' 529 512 0.52 1.23 0.14 0.24
13 A' 202 196 3.88 1.90 0.72 0.84
14 A" 3187 3089 13.69 21.20 0.75 0.86
15 A" 3149 3052 0.54 77.77 0.75 0.86
16 A" 1491 1445 6.86 5.02 0.75 0.86
17 A" 1284 1244 0.01 1.93 0.75 0.86
18 A" 1107 1073 0.55 0.12 0.75 0.86
19 A" 783 759 2.16 0.34 0.75 0.86
20 A" 374 362 0.19 1.07 0.75 0.86
21 A" 224 217 1.00 0.39 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16272.0 cm-1
Scaled (by 0.9692) Zero Point Vibrational Energy (zpe) 15770.8 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=FULL/aug-cc-pVDZ
ABC
0.90836 0.15475 0.13918

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/aug-cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.515 0.567 0.000
C2 0.000 0.830 0.000
C3 -0.770 -0.426 0.000
N4 -1.365 -1.452 0.000
H5 2.058 1.522 0.000
H6 1.810 -0.004 0.891
H7 1.810 -0.004 -0.891
H8 -0.294 1.411 0.887
H9 -0.294 1.411 -0.887

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.53722.49123.51641.09901.09861.09862.18402.1840
C21.53721.47282.65832.17102.18272.18271.10051.1005
C32.49121.47281.18573.43392.76212.76212.09482.0948
N43.51642.65831.18574.53393.60103.60103.18293.1829
H51.09902.17103.43394.53391.78471.78472.51532.5153
H61.09862.18272.76213.60101.78471.78212.53543.0965
H71.09862.18272.76213.60101.78471.78213.09652.5354
H82.18401.10052.09483.18292.51532.53543.09651.7733
H92.18401.10052.09483.18292.51533.09652.53541.7733

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 111.696 C1 C2 H8 110.695
C1 C2 H9 110.695 C2 C1 H5 109.759
C2 C1 H6 110.706 C2 C1 H7 110.706
C2 C3 N4 178.544 C3 C2 H8 108.121
C3 C2 H9 108.121 H5 C1 H6 108.604
H5 C1 H7 108.604 H6 C1 H7 108.403
H8 C2 H9 107.358
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability