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

using model chemistry: B2PLYP=FULL/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes Cs 1A'
Energy calculated at B2PLYP=FULL/3-21G
 hartrees
Energy at 0K-170.882303
Energy at 298.15K 
HF Energy-170.746726
Nuclear repulsion energy102.257386
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 B2PLYP=FULL/3-21G
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 3013 16.36      
2 A' 3094 2946 15.23      
3 A' 3093 2944 3.63      
4 A' 2273 2164 0.14      
5 A' 1589 1512 7.02      
6 A' 1559 1484 7.74      
7 A' 1486 1415 4.05      
8 A' 1401 1333 1.17      
9 A' 1138 1083 7.65      
10 A' 1005 957 0.36      
11 A' 839 799 0.11      
12 A' 587 559 1.89      
13 A' 241 230 2.34      
14 A" 3173 3020 15.54      
15 A" 3128 2978 0.83      
16 A" 1584 1508 8.38      
17 A" 1358 1293 0.00      
18 A" 1178 1122 0.88      
19 A" 830 790 4.79      
20 A" 448 427 0.05      
21 A" 229 218 0.50      

Unscaled Zero Point Vibrational Energy (zpe) 16698.6 cm-1
Scaled (by 0.952) Zero Point Vibrational Energy (zpe) 15897.0 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 B2PLYP=FULL/3-21G
ABC
0.91429 0.15516 0.13959

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.528 0.549 0.000
C2 0.000 0.822 0.000
C3 -0.774 -0.422 0.000
N4 -1.382 -1.424 0.000
H5 2.069 1.498 0.000
H6 1.813 -0.019 0.888
H7 1.813 -0.019 -0.888
H8 -0.274 1.408 0.883
H9 -0.274 1.408 -0.883

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.55242.49883.51581.09241.09161.09162.18302.1830
C21.55241.46512.63702.17682.18692.18691.09461.0946
C32.49881.46511.17203.43092.76492.76492.09252.0925
N43.51582.63701.17204.52193.60133.60133.16673.1667
H51.09242.17683.43094.52191.77631.77632.50552.5055
H61.09162.18692.76493.60131.77631.77512.52843.0867
H71.09162.18692.76493.60131.77631.77513.08672.5284
H82.18301.09462.09253.16672.50552.52843.08671.7660
H92.18301.09462.09253.16672.50553.08672.52841.7660

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 111.775 C1 C2 H8 109.906
C1 C2 H9 109.906 C2 C1 H5 109.551
C2 C1 H6 110.391 C2 C1 H7 110.391
C2 C3 N4 179.317 C3 C2 H8 108.803
C3 C2 H9 108.803 H5 C1 H6 108.840
H5 C1 H7 108.840 H6 C1 H7 108.791
H8 C2 H9 107.540
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability