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

using model chemistry: CCD/3-21G

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/3-21G
 hartrees
Energy at 0K-170.418360
Energy at 298.15K 
HF Energy-170.007784
Nuclear repulsion energy101.793799
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/3-21G
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' 3123 3036 18.42      
2 A' 3058 2974 6.49      
3 A' 3054 2969 13.00      
4 A' 2321 2256 0.28      
5 A' 1583 1539 6.15      
6 A' 1560 1517 6.30      
7 A' 1485 1444 3.68      
8 A' 1405 1366 0.80      
9 A' 1135 1103 6.67      
10 A' 998 970 0.76      
11 A' 827 804 0.41      
12 A' 572 556 1.57      
13 A' 237 231 2.55      
14 A" 3130 3043 18.50      
15 A" 3092 3006 1.24      
16 A" 1579 1535 6.99      
17 A" 1353 1316 0.00      
18 A" 1179 1146 0.83      
19 A" 825 802 3.64      
20 A" 433 421 0.00      
21 A" 231 225 0.56      

Unscaled Zero Point Vibrational Energy (zpe) 16588.8 cm-1
Scaled (by 0.9723) Zero Point Vibrational Energy (zpe) 16129.3 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/3-21G
ABC
0.90660 0.15350 0.13814

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.536 0.554 0.000
C2 0.000 0.827 0.000
C3 -0.780 -0.430 0.000
N4 -1.387 -1.430 0.000
H5 2.079 1.509 0.000
H6 1.822 -0.017 0.892
H7 1.822 -0.017 -0.892
H8 -0.276 1.414 0.887
H9 -0.276 1.414 -0.887

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.56022.51653.53331.09791.09711.09712.19392.1939
C21.56021.47912.64942.18792.19712.19711.09951.0995
C32.51651.47911.17043.45412.78142.78142.10762.1076
N43.53332.64941.17044.54443.61833.61833.18013.1801
H51.09792.18793.45414.54441.78551.78552.51902.5190
H61.09712.19712.78143.61831.78551.78442.53983.1013
H71.09712.19712.78143.61831.78551.78443.10132.5398
H82.19391.09952.10763.18012.51902.53983.10131.7750
H92.19391.09952.10763.18012.51903.10132.53981.7750

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 111.750 C1 C2 H8 109.933
C1 C2 H9 109.933 C2 C1 H5 109.569
C2 C1 H6 110.328 C2 C1 H7 110.328
C2 C3 N4 179.439 C3 C2 H8 108.741
C3 C2 H9 108.741 H5 C1 H6 108.876
H5 C1 H7 108.876 H6 C1 H7 108.830
H8 C2 H9 107.639
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability