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

using model chemistry: CCSD(T)=FULL/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 CCSD(T)=FULL/cc-pVTZ
 hartrees
Energy at 0K-171.829358
Energy at 298.15K 
HF Energy-171.020920
Nuclear repulsion energy103.108123
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 CCSD(T)=FULL/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' 3140 3008        
2 A' 3083 2953        
3 A' 3075 2945        
4 A' 2312 2214        
5 A' 1526 1462        
6 A' 1496 1433        
7 A' 1431 1371        
8 A' 1366 1309        
9 A' 1105 1059        
10 A' 1038 994        
11 A' 849 813        
12 A' 540 517        
13 A' 210 201        
14 A" 3142 3010        
15 A" 3106 2976        
16 A" 1520 1456        
17 A" 1307 1252        
18 A" 1125 1078        
19 A" 792 759        
20 A" 392 376        
21 A" 241 231        

Unscaled Zero Point Vibrational Energy (zpe) 16396.7 cm-1
Scaled (by 0.958) Zero Point Vibrational Energy (zpe) 15708.0 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 CCSD(T)=FULL/cc-pVTZ
ABC
0.93405 0.15752 0.14184

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)=FULL/cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.506 0.562 0.000
C2 0.000 0.817 0.000
C3 -0.766 -0.430 0.000
N4 -1.357 -1.427 0.000
H5 2.040 1.509 0.000
H6 1.799 -0.002 0.881
H7 1.799 -0.002 -0.881
H8 -0.293 1.392 0.876
H9 -0.293 1.392 -0.876

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.52742.47883.48581.08661.08661.08662.16602.1660
C21.52741.46302.62192.15392.16442.16441.08791.0879
C32.47881.46301.15903.41002.74542.74542.07552.0755
N43.48582.62191.15904.48923.57283.57283.13713.1371
H51.08662.15393.41004.48921.76551.76552.49462.4946
H61.08662.16442.74543.57281.76551.76172.51403.0671
H71.08662.16442.74543.57281.76551.76173.06712.5140
H82.16601.08792.07553.13712.49462.51403.06711.7521
H92.16601.08792.07553.13712.49463.06712.51401.7521

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 111.958 C1 C2 H8 110.708
C1 C2 H9 110.708 C2 C1 H5 109.824
C2 C1 H6 110.657 C2 C1 H7 110.657
C2 C3 N4 179.105 C3 C2 H8 108.006
C3 C2 H9 108.006 H5 C1 H6 108.660
H5 C1 H7 108.660 H6 C1 H7 108.323
H8 C2 H9 107.281
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability