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

using model chemistry: CCSD(T)/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 CCSD(T)/6-311G*
 hartrees
Energy at 0K-171.618753
Energy at 298.15K 
HF Energy-170.993618
Nuclear repulsion energy102.281039
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)/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' 3121 3004        
2 A' 3053 2939        
3 A' 3040 2926        
4 A' 2284 2198        
5 A' 1526 1469        
6 A' 1505 1448        
7 A' 1441 1387        
8 A' 1369 1318        
9 A' 1104 1063        
10 A' 1031 992        
11 A' 840 809        
12 A' 535 515        
13 A' 207 199        
14 A" 3127 3010        
15 A" 3093 2977        
16 A" 1521 1464        
17 A" 1305 1257        
18 A" 1131 1089        
19 A" 791 762        
20 A" 376 362        
21 A" 223 214        

Unscaled Zero Point Vibrational Energy (zpe) 16310.4 cm-1
Scaled (by 0.9626) Zero Point Vibrational Energy (zpe) 15700.4 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)/6-311G*
ABC
0.91927 0.15497 0.13956

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.517 0.568 0.000
C2 0.000 0.823 0.000
C3 -0.773 -0.434 0.000
N4 -1.365 -1.440 0.000
H5 2.054 1.525 0.000
H6 1.817 0.002 0.888
H7 1.817 0.002 -0.888
H8 -0.297 1.404 0.883
H9 -0.297 1.404 -0.883

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.53842.50023.51321.09641.09571.09572.18372.1837
C21.53841.47592.64292.17032.18302.18301.09781.0978
C32.50021.47591.16703.43922.77272.77272.09392.0939
N43.51322.64291.16704.52533.60483.60483.16333.1633
H51.09642.17033.43924.52531.77911.77912.51412.5141
H61.09572.18302.77273.60481.77911.77702.53673.0940
H71.09572.18302.77273.60481.77911.77703.09402.5367
H82.18371.09782.09393.16332.51412.53673.09401.7660
H92.18371.09782.09393.16332.51413.09402.53671.7660

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 112.064 C1 C2 H8 110.755
C1 C2 H9 110.755 C2 C1 H5 109.778
C2 C1 H6 110.819 C2 C1 H7 110.819
C2 C3 N4 178.911 C3 C2 H8 107.989
C3 C2 H9 107.989 H5 C1 H6 108.498
H5 C1 H7 108.498 H6 C1 H7 108.357
H8 C2 H9 107.100
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability