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

using model chemistry: CCD/6-31G**

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/6-31G**
 hartrees
Energy at 0K-171.569055
Energy at 298.15K 
HF Energy-170.968270
Nuclear repulsion energy102.625995
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/6-31G**
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' 3223 3022 19.96      
2 A' 3142 2946 8.57      
3 A' 3133 2938 16.02      
4 A' 2385 2236 0.54      
5 A' 1566 1468 3.92      
6 A' 1539 1443 3.07      
7 A' 1479 1387 0.70      
8 A' 1407 1319 3.63      
9 A' 1132 1061 3.20      
10 A' 1056 990 0.86      
11 A' 863 809 0.70      
12 A' 542 508 0.66      
13 A' 211 198 4.36      
14 A" 3228 3027 20.12      
15 A" 3189 2990 2.15      
16 A" 1559 1461 5.23      
17 A" 1332 1249 0.01      
18 A" 1154 1082 0.32      
19 A" 810 760 2.19      
20 A" 386 362 0.49      
21 A" 230 216 1.14      

Unscaled Zero Point Vibrational Energy (zpe) 16781.6 cm-1
Scaled (by 0.9376) Zero Point Vibrational Energy (zpe) 15734.4 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/6-31G**
ABC
0.93343 0.15539 0.14013

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.513 0.574 0.000
C2 0.000 0.819 0.000
C3 -0.768 -0.438 0.000
N4 -1.363 -1.439 0.000
H5 2.041 1.526 0.000
H6 1.813 0.012 0.883
H7 1.813 0.012 -0.883
H8 -0.296 1.395 0.877
H9 -0.296 1.395 -0.877

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.53232.49493.51011.08891.08851.08852.17162.1716
C21.53231.47302.63712.15992.17152.17151.09051.0905
C32.49491.47301.16423.42732.76402.76402.08622.0862
N43.51012.63711.16424.51413.60123.60123.15233.1523
H51.08892.15993.42734.51411.76741.76742.49982.4998
H61.08852.17152.76403.60121.76741.76522.52193.0753
H71.08852.17152.76403.60121.76741.76523.07532.5219
H82.17161.09052.08623.15232.49982.52193.07531.7545
H92.17161.09052.08623.15232.49983.07532.52191.7545

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 112.217 C1 C2 H8 110.652
C1 C2 H9 110.652 C2 C1 H5 109.816
C2 C1 H6 110.766 C2 C1 H7 110.766
C2 C3 N4 179.345 C3 C2 H8 108.011
C3 C2 H9 108.011 H5 C1 H6 108.530
H5 C1 H7 108.530 H6 C1 H7 108.365
H8 C2 H9 107.107
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability