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All results from a given calculation for CH3CN (Acetonitrile)

using model chemistry: B3LYP/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at B3LYP/3-21G*
 hartrees
Energy at 0K-132.027625
Energy at 298.15K-132.030380
HF Energy-132.027625
Nuclear repulsion energy58.282238
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 B3LYP/3-21G*
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 3063 2947 1.81 116.57 0.00 0.00
2 A1 2361 2271 2.42 36.01 0.30 0.46
3 A1 1480 1424 12.63 17.60 0.62 0.77
4 A1 927 891 1.85 2.86 0.19 0.32
5 E 3126 3007 1.63 64.42 0.75 0.86
5 E 3126 3007 1.63 64.42 0.75 0.86
6 E 1545 1486 14.15 21.88 0.75 0.86
6 E 1545 1486 14.15 21.88 0.75 0.86
7 E 1123 1080 4.79 0.00 0.75 0.86
7 E 1123 1080 4.79 0.00 0.75 0.86
8 E 458 440 0.13 3.80 0.75 0.86
8 E 458 440 0.13 3.80 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 10166.6 cm-1
Scaled (by 0.962) Zero Point Vibrational Energy (zpe) 9780.2 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 B3LYP/3-21G*
ABC
5.29019 0.30586 0.30586

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/3-21G*

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 0.278
N3 0.000 0.000 1.441
H4 0.000 1.027 -1.560
H5 0.889 -0.513 -1.560
H6 -0.889 -0.513 -1.560

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.45672.62011.09521.09521.0952
C21.45671.16332.10552.10552.1055
N32.62011.16333.17233.17233.1723
H41.09522.10553.17231.77821.7782
H51.09522.10553.17231.77821.7782
H61.09522.10553.17231.77821.7782

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 110.385
C2 C1 H5 110.385 C2 C1 H6 110.385
H4 C1 H5 108.542 H4 C1 H6 108.542
H5 C1 H6 108.542
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.609      
2 C 0.324      
3 N -0.476      
4 H 0.254      
5 H 0.254      
6 H 0.254      


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 -3.607 3.607
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.333 0.000 0.000
y 0.000 -17.333 0.000
z 0.000 0.000 -20.409
Traceless
 xyz
x 1.538 0.000 0.000
y 0.000 1.538 0.000
z 0.000 0.000 -3.076
Polar
3z2-r2-6.151
x2-y20.000
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.300 0.000 0.000
y 0.000 2.300 0.000
z 0.000 0.000 4.626


<r2> (average value of r2) Å2
<r2> 45.273
(<r2>)1/2 6.729