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

using model chemistry: CCSD(T)=FULL/Def2TZVPP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes Cs 1A'
Energy calculated at CCSD(T)=FULL/Def2TZVPP
 hartrees
Energy at 0K-171.849642
Energy at 298.15K 
HF Energy-171.026498
Nuclear repulsion energy102.912851
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 CCSD(T)=FULL/Def2TZVPP
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' 3137 3137        
2 A' 3070 3070        
3 A' 3057 3057        
4 A' 2300 2300        
5 A' 1512 1512        
6 A' 1482 1482        
7 A' 1426 1426        
8 A' 1358 1358        
9 A' 1098 1098        
10 A' 1031 1031        
11 A' 843 843        
12 A' 535 535        
13 A' 206 206        
14 A" 3140 3140        
15 A" 3110 3110        
16 A" 1507 1507        
17 A" 1302 1302        
18 A" 1120 1120        
19 A" 788 788        
20 A" 379 379        
21 A" 225 225        

Unscaled Zero Point Vibrational Energy (zpe) 16312.6 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 16312.6 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 CCSD(T)=FULL/Def2TZVPP
ABC
0.92549 0.15715 0.14137

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)=FULL/Def2TZVPP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.509 0.560 0.000
C2 0.000 0.821 0.000
C3 -0.770 -0.429 0.000
N4 -1.357 -1.429 0.000
H5 2.046 1.506 0.000
H6 1.801 -0.006 0.882
H7 1.801 -0.006 -0.882
H8 -0.292 1.397 0.878
H9 -0.292 1.397 -0.878

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.53142.48423.48851.08811.08801.08802.17152.1715
C21.53141.46842.62792.15762.16922.16921.08961.0896
C32.48421.46841.15963.41682.75072.75072.08132.0813
N43.48852.62791.15964.49403.57443.57443.14473.1447
H51.08812.15763.41684.49401.76771.76772.50002.5000
H61.08802.16922.75073.57441.76771.76462.51953.0735
H71.08802.16922.75073.57441.76771.76463.07352.5195
H82.17151.08962.08133.14472.50002.51953.07351.7557
H92.17151.08962.08133.14472.50003.07352.51951.7557

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 111.798 C1 C2 H8 110.761
C1 C2 H9 110.761 C2 C1 H5 109.748
C2 C1 H6 110.676 C2 C1 H7 110.676
C2 C3 N4 178.790 C3 C2 H8 107.998
C3 C2 H9 107.998 H5 C1 H6 108.651
H5 C1 H7 108.651 H6 C1 H7 108.382
H8 C2 H9 107.357
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability