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All results from a given calculation for CH3CN (Acetonitrile)

using model chemistry: B3PW91/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at B3PW91/6-31G
 hartrees
Energy at 0K-132.660319
Energy at 298.15K-132.662925
HF Energy-132.660319
Nuclear repulsion energy58.149054
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 B3PW91/6-31G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3070 2940 3.08      
2 A1 2337 2238 9.17      
3 A1 1467 1405 12.79      
4 A1 954 913 2.16      
5 E 3158 3024 1.97      
5 E 3158 3024 1.97      
6 E 1516 1452 16.90      
6 E 1516 1452 16.90      
7 E 1099 1053 4.69      
7 E 1099 1053 4.69      
8 E 379 363 0.01      
8 E 379 363 0.01      

Unscaled Zero Point Vibrational Energy (zpe) 10064.5 cm-1
Scaled (by 0.9577) Zero Point Vibrational Energy (zpe) 9638.8 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 B3PW91/6-31G
ABC
5.31369 0.30454 0.30454

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31G

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.179
C2 0.000 0.000 0.275
N3 0.000 0.000 1.446
H4 0.000 1.024 -1.565
H5 0.887 -0.512 -1.565
H6 -0.887 -0.512 -1.565

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.45422.62581.09461.09461.0946
C21.45421.17162.10582.10582.1058
N32.62581.17163.18093.18093.1809
H41.09462.10583.18091.77421.7742
H51.09462.10583.18091.77421.7742
H61.09462.10583.18091.77421.7742

picture of Acetonitrile state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 180.000 C2 C1 H4 110.633
C2 C1 H5 110.633 C2 C1 H6 110.633
H4 C1 H5 108.285 H4 C1 H6 108.285
H5 C1 H6 108.285
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.534      
2 C 0.160      
3 N -0.302      
4 H 0.225      
5 H 0.225      
6 H 0.225      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -3.922 3.922
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.308 0.000 0.000
y 0.000 -17.308 0.000
z 0.000 0.000 -20.700
Traceless
 xyz
x 1.696 0.000 0.000
y 0.000 1.696 0.000
z 0.000 0.000 -3.392
Polar
3z2-r2-6.785
x2-y20.000
xy0.000
xz0.000
yz0.000


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