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

using model chemistry: CCD/cc-pVTZ

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/cc-pVTZ
 hartrees
Energy at 0K-171.729121
Energy at 298.15K 
HF Energy-171.021776
Nuclear repulsion energy103.057407
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/cc-pVTZ
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' 3161 2952 16.24      
2 A' 3095 2890 6.06      
3 A' 3079 2875 14.14      
4 A' 2378 2221 2.01      
5 A' 1528 1427 4.92      
6 A' 1501 1402 4.20      
7 A' 1440 1344 1.28      
8 A' 1377 1286 3.60      
9 A' 1114 1040 3.13      
10 A' 1042 973 0.80      
11 A' 853 797 0.45      
12 A' 548 512 0.58      
13 A' 213 199 4.25      
14 A" 3165 2955 15.77      
15 A" 3135 2927 0.21      
16 A" 1521 1420 6.60      
17 A" 1313 1226 0.00      
18 A" 1134 1059 0.47      
19 A" 798 745 2.39      
20 A" 390 364 0.44      
21 A" 226 211 1.05      

Unscaled Zero Point Vibrational Energy (zpe) 16506.4 cm-1
Scaled (by 0.9337) Zero Point Vibrational Energy (zpe) 15412.0 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 CCD/cc-pVTZ
ABC
0.93316 0.15716 0.14155

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.509 0.562 0.000
C2 0.000 0.817 0.000
C3 -0.768 -0.434 0.000
N4 -1.359 -1.424 0.000
H5 2.045 1.510 0.000
H6 1.806 -0.002 0.882
H7 1.806 -0.002 -0.882
H8 -0.295 1.392 0.877
H9 -0.295 1.392 -0.877

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.53062.48583.48871.08841.08821.08822.17072.1707
C21.53061.46782.62042.15892.17002.17001.08951.0895
C32.48581.46781.15273.41922.75482.75482.08022.0802
N43.48872.62041.15274.49343.57953.57953.13533.1353
H51.08842.15893.41924.49341.76691.76692.50112.5011
H61.08822.17002.75483.57951.76691.76352.52113.0740
H71.08822.17002.75483.57951.76691.76353.07402.5211
H82.17071.08952.08023.13532.50112.52113.07401.7542
H92.17071.08952.08023.13532.50113.07402.52111.7542

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 111.990 C1 C2 H8 110.764
C1 C2 H9 110.764 C2 C1 H5 109.888
C2 C1 H6 110.786 C2 C1 H7 110.786
C2 C3 N4 179.262 C3 C2 H8 107.952
C3 C2 H9 107.952 H5 C1 H6 108.531
H5 C1 H7 108.531 H6 C1 H7 108.248
H8 C2 H9 107.235
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability