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

using model chemistry: CCD/daug-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 CCD/daug-cc-pVDZ
 hartrees
Energy at 0K-171.600444
Energy at 298.15K 
HF Energy-170.980746
Nuclear repulsion energy101.974331
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 CCD/daug-cc-pVDZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3146 3146 19.95      
2 A' 3073 3073 7.92      
3 A' 3058 3058 16.25      
4 A' 2337 2337 1.40      
5 A' 1498 1498 4.02      
6 A' 1470 1470 3.68      
7 A' 1414 1414 0.86      
8 A' 1352 1352 4.71      
9 A' 1098 1098 2.64      
10 A' 1036 1036 0.94      
11 A' 845 845 0.59      
12 A' 536 536 0.51      
13 A' 209 209 4.40      
14 A" 3148 3148 19.65      
15 A" 3118 3118 0.48      
16 A" 1492 1492 5.90      
17 A" 1289 1289 0.03      
18 A" 1115 1115 0.48      
19 A" 782 782 1.85      
20 A" 380 380 0.48      
21 A" 221 221 1.09      

Unscaled Zero Point Vibrational Energy (zpe) 16308.0 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 16308.0 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 CCD/daug-cc-pVDZ
ABC
0.91448 0.15401 0.13875

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/daug-cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.521 0.572 0.000
C2 0.000 0.826 0.000
C3 -0.775 -0.438 0.000
N4 -1.368 -1.445 0.000
H5 2.057 1.534 0.000
H6 1.822 0.003 0.893
H7 1.822 0.003 -0.893
H8 -0.299 1.406 0.888
H9 -0.299 1.406 -0.888

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.54162.50773.52331.10131.10101.10102.18942.1894
C21.54161.48242.65112.17552.18952.18951.10201.1020
C32.50771.48241.16883.45072.78102.78102.10152.1015
N43.52332.65111.16884.53943.61523.61523.17203.1720
H51.10132.17553.45074.53941.78801.78802.52072.5207
H61.10102.18952.78103.61521.78801.78602.54283.1044
H71.10102.18952.78103.61521.78801.78603.10442.5428
H82.18941.10202.10153.17202.52072.54283.10441.7760
H92.18941.10202.10153.17202.52073.10442.54281.7760

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 112.035 C1 C2 H8 110.729
C1 C2 H9 110.729 C2 C1 H5 109.679
C2 C1 H6 110.793 C2 C1 H7 110.793
C2 C3 N4 179.007 C3 C2 H8 107.899
C3 C2 H9 107.899 H5 C1 H6 108.558
H5 C1 H7 108.558 H6 C1 H7 108.395
H8 C2 H9 107.369
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability