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

using model chemistry: CCSD(T)=FULL/TZVP

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/TZVP
 hartrees
Energy at 0K-171.740205
Energy at 298.15K 
HF Energy-171.015606
Nuclear repulsion energy102.701253
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/TZVP
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' 3145 3006        
2 A' 3076 2941        
3 A' 3061 2926        
4 A' 2303 2202        
5 A' 1517 1450        
6 A' 1491 1426        
7 A' 1441 1378        
8 A' 1373 1313        
9 A' 1106 1058        
10 A' 1027 981        
11 A' 841 804        
12 A' 532 509        
13 A' 204 195        
14 A" 3150 3011        
15 A" 3118 2981        
16 A" 1513 1447        
17 A" 1297 1240        
18 A" 1127 1077        
19 A" 796 761        
20 A" 371 354        
21 A" 224 214        

Unscaled Zero Point Vibrational Energy (zpe) 16356.9 cm-1
Scaled (by 0.956) Zero Point Vibrational Energy (zpe) 15637.2 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/TZVP
ABC
0.92065 0.15660 0.14086

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.512 0.561 0.000
C2 0.000 0.822 0.000
C3 -0.774 -0.428 0.000
N4 -1.358 -1.432 0.000
H5 2.051 1.510 0.000
H6 1.805 -0.007 0.885
H7 1.805 -0.007 -0.885
H8 -0.291 1.399 0.881
H9 -0.291 1.399 -0.881

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.53452.49003.49421.09151.09111.09112.17522.1752
C21.53451.47002.63212.16322.17432.17431.09251.0925
C32.49001.47001.16233.42512.75812.75812.08452.0845
N43.49422.63211.16234.50313.58033.58033.15113.1511
H51.09152.16323.42514.50311.77291.77292.50522.5052
H61.09112.17432.75813.58031.77291.76942.52393.0803
H71.09112.17432.75813.58031.77291.76943.08032.5239
H82.17521.09252.08453.15112.50522.52393.08031.7622
H92.17521.09252.08453.15112.50523.08032.52391.7622

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 111.923 C1 C2 H8 110.665
C1 C2 H9 110.665 C2 C1 H5 109.775
C2 C1 H6 110.679 C2 C1 H7 110.679
C2 C3 N4 178.454 C3 C2 H8 107.959
C3 C2 H9 107.959 H5 C1 H6 108.646
H5 C1 H7 108.646 H6 C1 H7 108.357
H8 C2 H9 107.506
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability