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

using model chemistry: CCSD(T)/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(T)/6-311G**
 hartrees
Energy at 0K-171.657281
Energy at 298.15K 
HF Energy-171.000998
Nuclear repulsion energy102.279268
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(T)/6-311G**
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' 3135 3024        
2 A' 3067 2959        
3 A' 3053 2945        
4 A' 2284 2204        
5 A' 1516 1462        
6 A' 1489 1437        
7 A' 1431 1380        
8 A' 1363 1315        
9 A' 1102 1063        
10 A' 1029 993        
11 A' 840 810        
12 A' 533 514        
13 A' 207 199        
14 A" 3140 3030        
15 A" 3108 2998        
16 A" 1511 1457        
17 A" 1298 1252        
18 A" 1122 1083        
19 A" 792 764        
20 A" 378 364        
21 A" 225 217        

Unscaled Zero Point Vibrational Energy (zpe) 16311.0 cm-1
Scaled (by 0.9647) Zero Point Vibrational Energy (zpe) 15735.2 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 CCSD(T)/6-311G**
ABC
0.91770 0.15503 0.13959

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.518 0.567 0.000
C2 0.000 0.824 0.000
C3 -0.774 -0.433 0.000
N4 -1.365 -1.439 0.000
H5 2.056 1.522 0.000
H6 1.813 -0.002 0.889
H7 1.813 -0.002 -0.889
H8 -0.295 1.403 0.884
H9 -0.295 1.403 -0.884

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.53982.50063.51271.09601.09551.09552.18332.1833
C21.53981.47642.64332.17092.18122.18121.09701.0970
C32.50061.47641.16703.43932.76852.76852.09352.0935
N43.51272.64331.16704.52473.59933.59933.16323.1632
H51.09602.17093.43934.52471.78091.78092.51392.5139
H61.09552.18122.76853.59931.78091.77772.53253.0914
H71.09552.18122.76853.59931.78091.77773.09142.5325
H82.18331.09702.09353.16322.51392.53253.09141.7683
H92.18331.09702.09353.16322.51393.09142.53251.7683

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 111.987 C1 C2 H8 110.666
C1 C2 H9 110.666 C2 C1 H5 109.748
C2 C1 H6 110.588 C2 C1 H7 110.588
C2 C3 N4 178.854 C3 C2 H8 107.973
C3 C2 H9 107.973 H5 C1 H6 108.707
H5 C1 H7 108.707 H6 C1 H7 108.451
H8 C2 H9 107.406
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability