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

using model chemistry: MP2=FULL/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 MP2=FULL/6-311G**
 hartrees
Energy at 0K-171.677004
Energy at 298.15K 
HF Energy-171.000106
Nuclear repulsion energy102.589386
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 MP2=FULL/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' 3193 3029 15.61 69.36 0.71 0.83
2 A' 3110 2950 7.54 94.55 0.09 0.16
3 A' 3098 2939 14.52 134.56 0.01 0.02
4 A' 2210 2096 0.37 40.28 0.25 0.40
5 A' 1525 1447 5.56 6.45 0.75 0.85
6 A' 1496 1419 4.75 12.36 0.74 0.85
7 A' 1435 1361 1.79 1.87 0.25 0.40
8 A' 1368 1298 2.66 2.47 0.54 0.70
9 A' 1113 1055 2.94 4.04 0.15 0.27
10 A' 1047 993 0.66 4.73 0.51 0.67
11 A' 857 813 0.11 5.00 0.13 0.22
12 A' 542 514 0.66 1.56 0.34 0.50
13 A' 209 199 3.53 2.53 0.73 0.85
14 A" 3197 3033 15.08 23.57 0.75 0.86
15 A" 3159 2996 0.74 91.34 0.75 0.86
16 A" 1520 1442 7.59 11.15 0.75 0.86
17 A" 1308 1240 0.00 5.20 0.75 0.86
18 A" 1129 1071 0.50 0.15 0.75 0.86
19 A" 800 758 2.46 0.28 0.75 0.86
20 A" 386 366 0.13 2.42 0.75 0.86
21 A" 232 220 0.78 0.64 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16465.7 cm-1
Scaled (by 0.9486) Zero Point Vibrational Energy (zpe) 15619.4 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 MP2=FULL/6-311G**
ABC
0.92310 0.15632 0.14069

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-311G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.511 0.563 0.000
C2 0.000 0.821 0.000
C3 -0.768 -0.425 0.000
N4 -1.362 -1.437 0.000
H5 2.050 1.513 0.000
H6 1.803 -0.005 0.885
H7 1.803 -0.005 -0.885
H8 -0.292 1.401 0.880
H9 -0.292 1.401 -0.880

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.53242.48343.49991.09201.09161.09162.17352.1735
C21.53241.46382.63682.16342.17192.17191.09361.0936
C32.48341.46381.17313.41972.75142.75142.08232.0823
N43.49992.63681.17314.50983.58493.58493.15783.1578
H51.09202.16343.41974.50981.77381.77382.50402.5040
H61.09162.17192.75143.58491.77381.77022.52253.0790
H71.09162.17192.75143.58491.77381.77023.07902.5225
H82.17351.09362.08233.15782.50402.52253.07901.7609
H92.17351.09362.08233.15782.50403.07902.52251.7609

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 111.937 C1 C2 H8 110.606
C1 C2 H9 110.606 C2 C1 H5 109.909
C2 C1 H6 110.607 C2 C1 H7 110.607
C2 C3 N4 178.796 C3 C2 H8 108.145
C3 C2 H9 108.145 H5 C1 H6 108.651
H5 C1 H7 108.651 H6 C1 H7 108.358
H8 C2 H9 107.236
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability