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

using model chemistry: MP2=FULL/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 MP2=FULL/6-31G**
 hartrees
Energy at 0K-171.562088
Energy at 298.15K 
HF Energy-170.965565
Nuclear repulsion energy102.582499
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/6-31G**
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3247 3034 15.02 64.24 0.73 0.84
2 A' 3151 2944 9.06 52.13 0.14 0.25
3 A' 3147 2940 11.97 140.29 0.01 0.03
4 A' 2227 2081 0.35 33.92 0.29 0.45
5 A' 1566 1464 4.31 9.95 0.74 0.85
6 A' 1533 1433 3.81 17.09 0.72 0.84
7 A' 1472 1375 1.00 2.40 0.65 0.78
8 A' 1396 1305 3.01 4.27 0.61 0.76
9 A' 1130 1056 3.41 3.68 0.17 0.28
10 A' 1057 988 0.52 4.88 0.53 0.69
11 A' 865 808 0.11 4.99 0.16 0.28
12 A' 539 504 0.76 1.51 0.40 0.58
13 A' 209 195 3.94 2.58 0.73 0.84
14 A" 3254 3040 14.32 28.73 0.75 0.86
15 A" 3205 2995 1.77 80.37 0.75 0.86
16 A" 1560 1458 6.04 17.85 0.75 0.86
17 A" 1330 1242 0.00 7.90 0.75 0.86
18 A" 1149 1074 0.30 0.23 0.75 0.86
19 A" 810 757 2.86 0.25 0.75 0.86
20 A" 386 361 0.31 2.78 0.75 0.86
21 A" 235 220 1.08 0.74 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16733.8 cm-1
Scaled (by 0.9344) Zero Point Vibrational Energy (zpe) 15636.0 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/6-31G**
ABC
0.93322 0.15564 0.14030

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.509 0.573 0.000
C2 0.000 0.819 0.000
C3 -0.762 -0.430 0.000
N4 -1.363 -1.445 0.000
H5 2.039 1.522 0.000
H6 1.806 0.011 0.881
H7 1.806 0.011 -0.881
H8 -0.294 1.397 0.876
H9 -0.294 1.397 -0.876

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.52852.48253.50981.08721.08651.08652.16652.1665
C21.52851.46362.64272.15702.16602.16601.08941.0894
C32.48251.46361.17913.41462.75082.75082.07952.0795
N43.50982.64271.17914.51423.59733.59733.15983.1598
H51.08722.15703.41464.51421.76451.76452.49522.4952
H61.08652.16602.75083.59731.76451.76192.51593.0686
H71.08652.16602.75083.59731.76451.76193.06862.5159
H82.16651.08942.07953.15982.49522.51593.06861.7518
H92.16651.08942.07953.15982.49523.06862.51591.7518

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 112.110 C1 C2 H8 110.577
C1 C2 H9 110.577 C2 C1 H5 109.955
C2 C1 H6 110.713 C2 C1 H7 110.713
C2 C3 N4 179.276 C3 C2 H8 108.186
C3 C2 H9 108.186 H5 C1 H6 108.526
H5 C1 H7 108.526 H6 C1 H7 108.341
H8 C2 H9 107.026
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability