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

using model chemistry: CCSD/TZVP

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/TZVP
 hartrees
Energy at 0K-171.643038
Energy at 298.15K 
HF Energy-171.016661
Nuclear repulsion energy102.887721
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/TZVP
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' 3163 3018 22.25      
2 A' 3099 2958 8.07      
3 A' 3081 2941 17.68      
4 A' 2362 2254 1.08      
5 A' 1529 1460 4.77      
6 A' 1507 1438 4.07      
7 A' 1455 1389 0.93      
8 A' 1389 1326 3.50      
9 A' 1118 1067 2.98      
10 A' 1037 990 0.77      
11 A' 850 811 0.82      
12 A' 542 517 0.56      
13 A' 209 200 4.03      
14 A" 3168 3023 22.80      
15 A" 3139 2996 0.32      
16 A" 1524 1455 6.27      
17 A" 1310 1250 0.14      
18 A" 1140 1088 0.56      
19 A" 805 768 1.29      
20 A" 381 364 0.27      
21 A" 227 217 0.97      

Unscaled Zero Point Vibrational Energy (zpe) 16516.9 cm-1
Scaled (by 0.9544) Zero Point Vibrational Energy (zpe) 15763.7 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 CCSD/TZVP
ABC
0.92673 0.15690 0.14123

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD/TZVP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.511 0.562 0.000
C2 0.000 0.819 0.000
C3 -0.772 -0.431 0.000
N4 -1.358 -1.428 0.000
H5 2.047 1.511 0.000
H6 1.806 -0.004 0.884
H7 1.806 -0.004 -0.884
H8 -0.293 1.395 0.880
H9 -0.293 1.395 -0.880

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.53252.48913.49071.09061.09031.09032.17302.1730
C21.53251.46952.62542.16092.17262.17261.09141.0914
C32.48911.46951.15613.42342.75802.75802.08242.0824
N43.49072.62541.15614.49783.57953.57953.14223.1422
H51.09062.16093.42344.49781.77111.77112.50312.5031
H61.09032.17262.75803.57951.77111.76772.52243.0779
H71.09032.17262.75803.57951.77111.76773.07792.5224
H82.17301.09142.08243.14222.50312.52243.07791.7599
H92.17301.09142.08243.14222.50313.07792.52241.7599

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 112.007 C1 C2 H8 110.698
C1 C2 H9 110.698 C2 C1 H5 109.789
C2 C1 H6 110.730 C2 C1 H7 110.730
C2 C3 N4 178.749 C3 C2 H8 107.902
C3 C2 H9 107.902 H5 C1 H6 108.604
H5 C1 H7 108.604 H6 C1 H7 108.322
H8 C2 H9 107.461
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability