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

using model chemistry: CCSD/cc-pVDZ

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/cc-pVDZ
 hartrees
Energy at 0K-171.576144
Energy at 298.15K 
HF Energy-170.972697
Nuclear repulsion energy101.922440
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/cc-pVDZ
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' 3165 2998 18.52      
2 A' 3091 2928 7.85      
3 A' 3076 2914 18.49      
4 A' 2341 2217 0.47      
5 A' 1504 1424 4.16      
6 A' 1478 1400 3.30      
7 A' 1424 1349 0.43      
8 A' 1363 1291 4.90      
9 A' 1105 1047 2.45      
10 A' 1043 988 1.05      
11 A' 850 805 0.67      
12 A' 535 507 0.61      
13 A' 210 199 3.51      
14 A" 3170 3003 18.40      
15 A" 3137 2972 1.14      
16 A" 1496 1417 5.81      
17 A" 1295 1226 0.01      
18 A" 1118 1059 0.58      
19 A" 790 748 2.19      
20 A" 384 364 0.19      
21 A" 229 217 0.81      

Unscaled Zero Point Vibrational Energy (zpe) 16401.7 cm-1
Scaled (by 0.9473) Zero Point Vibrational Energy (zpe) 15537.3 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/cc-pVDZ
ABC
0.91743 0.15375 0.13862

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.519 0.578 0.000
C2 0.000 0.825 0.000
C3 -0.772 -0.441 0.000
N4 -1.368 -1.448 0.000
H5 2.055 1.542 0.000
H6 1.823 0.007 0.894
H7 1.823 0.007 -0.894
H8 -0.302 1.407 0.888
H9 -0.302 1.407 -0.888

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.53862.50693.52641.10351.10351.10352.18922.1892
C21.53861.48232.65282.17642.18862.18861.10441.1044
C32.50691.48231.17053.45302.78102.78102.10322.1032
N43.52642.65281.17054.54493.61923.61923.17443.1744
H51.10352.17643.45304.54491.79141.79142.52252.5225
H61.10352.18862.78103.61921.79141.78892.54443.1069
H71.10352.18862.78103.61921.79141.78893.10692.5444
H82.18921.10442.10323.17442.52252.54443.10691.7770
H92.18921.10442.10323.17442.52253.10692.54441.7770

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 112.157 C1 C2 H8 110.778
C1 C2 H9 110.778 C2 C1 H5 109.832
C2 C1 H6 110.791 C2 C1 H7 110.791
C2 C3 N4 179.190 C3 C2 H8 107.904
C3 C2 H9 107.904 H5 C1 H6 108.528
H5 C1 H7 108.528 H6 C1 H7 108.301
H8 C2 H9 107.124
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability