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

using model chemistry: B2PLYP=FULL/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes Cs 1A'
Energy calculated at B2PLYP=FULL/6-31+G**
 hartrees
Energy at 0K-171.903536
Energy at 298.15K 
HF Energy-171.704131
Nuclear repulsion energy102.534749
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 B2PLYP=FULL/6-31+G**
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' 3175 3020 18.63      
2 A' 3095 2943 9.78      
3 A' 3091 2940 17.47      
4 A' 2294 2181 3.78      
5 A' 1532 1457 6.31      
6 A' 1503 1429 5.17      
7 A' 1446 1375 1.58      
8 A' 1371 1304 3.70      
9 A' 1110 1056 3.86      
10 A' 1030 980 0.52      
11 A' 848 806 0.33      
12 A' 540 514 0.96      
13 A' 209 199 3.93      
14 A" 3181 3025 17.44      
15 A" 3137 2984 1.06      
16 A" 1526 1451 8.45      
17 A" 1305 1241 0.01      
18 A" 1130 1075 0.46      
19 A" 801 762 2.60      
20 A" 383 365 0.13      
21 A" 229 218 0.90      

Unscaled Zero Point Vibrational Energy (zpe) 16467.9 cm-1
Scaled (by 0.951) Zero Point Vibrational Energy (zpe) 15661.0 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 B2PLYP=FULL/6-31+G**
ABC
0.93149 0.15526 0.14000

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/6-31+G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.515 0.571 0.000
C2 0.000 0.816 0.000
C3 -0.769 -0.433 0.000
N4 -1.366 -1.437 0.000
H5 2.042 1.526 0.000
H6 1.818 0.009 0.884
H7 1.818 0.009 -0.884
H8 -0.296 1.395 0.878
H9 -0.296 1.395 -0.878

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.53512.49573.51261.09091.09041.09042.17512.1751
C21.53511.46732.63552.16232.17692.17691.09291.0929
C32.49571.46731.16833.42722.77002.77002.08312.0831
N43.51262.63551.16834.51703.60783.60783.15313.1531
H51.09092.16233.42724.51701.77011.77012.50112.5011
H61.09042.17692.77003.60781.77011.76792.52803.0816
H71.09042.17692.77003.60781.77011.76793.08162.5280
H82.17511.09292.08313.15312.50112.52803.08161.7568
H92.17511.09292.08313.15312.50113.08162.52801.7568

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 112.438 C1 C2 H8 110.594
C1 C2 H9 110.594 C2 C1 H5 109.703
C2 C1 H6 110.889 C2 C1 H7 110.889
C2 C3 N4 179.106 C3 C2 H8 108.017
C3 C2 H9 108.017 H5 C1 H6 108.483
H5 C1 H7 108.483 H6 C1 H7 108.322
H8 C2 H9 106.975
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability