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

using model chemistry: MP2/cc-pVTZ

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/cc-pVTZ
 hartrees
Energy at 0K-171.710477
Energy at 298.15K-171.715505
HF Energy-171.018814
Nuclear repulsion energy102.883565
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/cc-pVTZ
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' 3186 3026 12.09      
2 A' 3103 2946 6.03      
3 A' 3092 2936 12.25      
4 A' 2204 2093 0.01      
5 A' 1523 1446 4.98      
6 A' 1489 1413 5.00      
7 A' 1422 1350 1.55      
8 A' 1355 1287 2.80      
9 A' 1104 1048 3.10      
10 A' 1039 987 0.51      
11 A' 853 810 0.05      
12 A' 536 509 0.52      
13 A' 205 195 3.65      
14 A" 3190 3028 10.88      
15 A" 3150 2991 0.28      
16 A" 1516 1440 7.21      
17 A" 1302 1237 0.00      
18 A" 1121 1064 0.52      
19 A" 792 752 2.64      
20 A" 378 359 0.16      
21 A" 226 215 0.94      

Unscaled Zero Point Vibrational Energy (zpe) 16393.2 cm-1
Scaled (by 0.9495) Zero Point Vibrational Energy (zpe) 15565.3 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/cc-pVTZ
ABC
0.92336 0.15751 0.14159

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.507 0.560 0.000
C2 0.000 0.817 0.000
C3 -0.774 -0.419 0.000
N4 -1.354 -1.434 0.000
H5 2.050 1.502 0.000
H6 1.807 -0.005 0.879
H7 1.807 -0.005 -0.879
H8 -0.292 1.399 0.874
H9 -0.292 1.399 -0.874

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.52822.48193.48711.08751.08731.08732.16802.1680
C21.52821.45782.62672.16172.17062.17061.08981.0898
C32.48191.45781.16943.41562.75782.75782.07392.0739
N43.48712.62671.16944.49553.57853.57853.14973.1497
H51.08752.16173.41564.49551.76151.76152.50142.5014
H61.08732.17062.75783.57851.76151.75812.52463.0734
H71.08732.17062.75783.57851.76151.75813.07342.5246
H82.16801.08982.07393.14972.50142.52463.07341.7474
H92.16801.08982.07393.14972.50143.07342.52461.7474

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 112.421 C1 C2 H8 110.691
C1 C2 H9 110.691 C2 C1 H5 110.335
C2 C1 H6 111.061 C2 C1 H7 111.061
C2 C3 N4 177.635 C3 C2 H8 108.114
C3 C2 H9 108.114 H5 C1 H6 108.185
H5 C1 H7 108.185 H6 C1 H7 107.902
H8 C2 H9 106.584
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability