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

using model chemistry: CCSD/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/6-311G**
 hartrees
Energy at 0K-171.631676
Energy at 298.15K 
HF Energy-171.002367
Nuclear repulsion energy102.526955
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/6-311G**
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3150 3150 21.50      
2 A' 3087 3087 8.09      
3 A' 3070 3070 17.40      
4 A' 2349 2349 0.56      
5 A' 1527 1527 4.80      
6 A' 1503 1503 3.62      
7 A' 1446 1446 1.09      
8 A' 1380 1380 3.52      
9 A' 1115 1115 2.69      
10 A' 1041 1041 0.90      
11 A' 850 850 0.77      
12 A' 544 544 0.61      
13 A' 213 213 3.95      
14 A" 3156 3156 22.34      
15 A" 3127 3127 0.48      
16 A" 1522 1522 6.32      
17 A" 1311 1311 0.03      
18 A" 1135 1135 0.52      
19 A" 801 801 1.82      
20 A" 389 389 0.28      
21 A" 231 231 0.87      

Unscaled Zero Point Vibrational Energy (zpe) 16472.3 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 16472.3 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 CCSD/6-311G**
ABC
0.92594 0.15545 0.14009

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.516 0.568 0.000
C2 0.000 0.820 0.000
C3 -0.771 -0.437 0.000
N4 -1.365 -1.433 0.000
H5 2.051 1.524 0.000
H6 1.813 0.001 0.887
H7 1.813 0.001 -0.887
H8 -0.296 1.397 0.883
H9 -0.296 1.397 -0.883

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.53712.49863.50811.09471.09421.09422.17992.1799
C21.53711.47482.63452.16802.17872.17871.09531.0953
C32.49861.47481.15973.43612.76772.76772.09012.0901
N43.50812.63451.15974.51763.59823.59823.15143.1514
H51.09472.16803.43614.51761.77801.77802.51072.5107
H61.09422.17872.76773.59821.77801.77482.52983.0876
H71.09422.17872.76773.59821.77801.77483.08762.5298
H82.17991.09532.09013.15142.51072.52983.08761.7652
H92.17991.09532.09013.15142.51073.08762.52981.7652

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 112.095 C1 C2 H8 110.685
C1 C2 H9 110.685 C2 C1 H5 109.786
C2 C1 H6 110.661 C2 C1 H7 110.661
C2 C3 N4 179.261 C3 C2 H8 107.911
C3 C2 H9 107.911 H5 C1 H6 108.641
H5 C1 H7 108.641 H6 C1 H7 108.393
H8 C2 H9 107.373
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability