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

using model chemistry: CCD/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 CCD/6-31+G**
 hartrees
Energy at 0K-171.576575
Energy at 298.15K 
HF Energy-170.972153
Nuclear repulsion energy102.571606
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/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' 3212 3027 20.61      
2 A' 3136 2955 8.26      
3 A' 3124 2943 19.01      
4 A' 2371 2234 1.48      
5 A' 1553 1464 5.18      
6 A' 1531 1442 3.76      
7 A' 1474 1389 1.34      
8 A' 1401 1320 3.81      
9 A' 1129 1064 3.12      
10 A' 1052 991 0.94      
11 A' 858 809 0.89      
12 A' 537 506 0.78      
13 A' 208 196 4.01      
14 A" 3218 3033 20.28      
15 A" 3183 2999 1.07      
16 A" 1546 1456 6.80      
17 A" 1321 1245 0.07      
18 A" 1147 1081 0.48      
19 A" 808 761 1.49      
20 A" 376 355 0.18      
21 A" 225 212 0.93      

Unscaled Zero Point Vibrational Energy (zpe) 16705.1 cm-1
Scaled (by 0.9423) Zero Point Vibrational Energy (zpe) 15741.2 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/6-31+G**
ABC
0.93240 0.15523 0.13999

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.513 0.575 0.000
C2 0.000 0.820 0.000
C3 -0.768 -0.438 0.000
N4 -1.363 -1.440 0.000
H5 2.040 1.528 0.000
H6 1.814 0.013 0.883
H7 1.814 0.013 -0.883
H8 -0.298 1.393 0.879
H9 -0.298 1.393 -0.879

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.53302.49623.51191.08961.08911.08912.17332.1733
C21.53301.47392.63892.16002.17262.17261.09091.0909
C32.49621.47391.16513.42862.76582.76582.08522.0852
N43.51192.63891.16514.51613.60343.60343.15183.1518
H51.08962.16003.42864.51611.76861.76862.50182.5018
H61.08912.17262.76583.60341.76861.76692.52293.0772
H71.08912.17262.76583.60341.76861.76693.07722.5229
H82.17331.09092.08523.15182.50182.52293.07721.7571
H92.17331.09092.08523.15182.50183.07722.52291.7571

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 112.218 C1 C2 H8 110.721
C1 C2 H9 110.721 C2 C1 H5 109.742
C2 C1 H6 110.770 C2 C1 H7 110.770
C2 C3 N4 179.310 C3 C2 H8 107.849
C3 C2 H9 107.849 H5 C1 H6 108.537
H5 C1 H7 108.537 H6 C1 H7 108.420
H8 C2 H9 107.290
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability