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

using model chemistry: MP2=FULL/6-31+G**

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/6-31+G**
 hartrees
Energy at 0K-171.570817
Energy at 298.15K 
HF Energy-170.969411
Nuclear repulsion energy102.517004
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/6-31+G**
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' 3236 3039 15.67 70.61 0.71 0.83
2 A' 3144 2953 7.67 93.60 0.09 0.16
3 A' 3136 2945 16.81 146.63 0.01 0.02
4 A' 2211 2077 0.00 53.00 0.19 0.32
5 A' 1552 1458 5.77 5.66 0.73 0.84
6 A' 1523 1431 4.84 11.26 0.75 0.86
7 A' 1465 1376 1.89 2.15 0.27 0.43
8 A' 1388 1304 3.10 2.91 0.61 0.76
9 A' 1126 1057 3.26 4.70 0.13 0.22
10 A' 1052 988 0.58 5.52 0.49 0.66
11 A' 860 808 0.21 5.32 0.11 0.21
12 A' 533 500 0.97 1.89 0.29 0.44
13 A' 204 192 3.54 3.05 0.74 0.85
14 A" 3243 3046 14.45 26.66 0.75 0.86
15 A" 3199 3004 0.90 82.83 0.75 0.86
16 A" 1545 1451 8.04 10.65 0.75 0.86
17 A" 1318 1238 0.02 5.27 0.75 0.86
18 A" 1142 1072 0.49 0.18 0.75 0.86
19 A" 807 758 1.93 0.26 0.75 0.86
20 A" 373 351 0.05 2.50 0.75 0.86
21 A" 230 216 0.82 1.00 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16642.9 cm-1
Scaled (by 0.9392) Zero Point Vibrational Energy (zpe) 15631.0 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 MP2=FULL/6-31+G**
ABC
0.93152 0.15548 0.14015

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31+G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.509 0.574 0.000
C2 0.000 0.820 0.000
C3 -0.762 -0.430 0.000
N4 -1.363 -1.446 0.000
H5 2.039 1.524 0.000
H6 1.807 0.012 0.882
H7 1.807 0.012 -0.882
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
C11.52932.48363.51161.08801.08721.08722.16852.1685
C21.52931.46462.64492.15712.16732.16731.08981.0898
C32.48361.46461.18033.41582.75242.75242.07842.0784
N43.51162.64491.18034.51643.59933.59933.15963.1596
H51.08802.15713.41584.51641.76581.76582.49752.4975
H61.08722.16732.75243.59931.76581.76372.51713.0709
H71.08722.16732.75243.59931.76581.76373.07092.5171
H82.16851.08982.07843.15962.49752.51713.07091.7548
H92.16851.08982.07843.15962.49753.07092.51711.7548

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 112.085 C1 C2 H8 110.661
C1 C2 H9 110.661 C2 C1 H5 109.860
C2 C1 H6 110.716 C2 C1 H7 110.716
C2 C3 N4 179.233 C3 C2 H8 108.007
C3 C2 H9 108.007 H5 C1 H6 108.540
H5 C1 H7 108.540 H6 C1 H7 108.404
H8 C2 H9 107.242
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability