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All results from a given calculation for CH3CN (Acetonitrile)

using model chemistry: MP2=FULL/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 MP2=FULL/6-31G
 hartrees
Energy at 0K-132.168912
Energy at 298.15K-132.171330
HF Energy-131.857845
Nuclear repulsion energy57.221493
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=FULL/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 3080 2926 5.21 121.65 0.00 0.00
2 A1 2120 2014 1.60 19.03 0.30 0.47
3 A1 1498 1423 5.50 12.44 0.65 0.79
4 A1 909 864 2.16 5.05 0.20 0.34
5 E 3167 3009 4.53 62.47 0.75 0.86
5 E 3167 3009 4.53 62.47 0.75 0.86
6 E 1552 1474 12.22 20.76 0.75 0.86
6 E 1552 1474 12.22 20.76 0.75 0.86
7 E 1116 1060 1.53 0.48 0.75 0.86
7 E 1116 1060 1.53 0.48 0.75 0.86
8 E 296 281 0.04 4.09 0.75 0.86
8 E 296 281 0.04 4.09 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 9932.9 cm-1
Scaled (by 0.9501) Zero Point Vibrational Energy (zpe) 9437.2 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 MP2=FULL/6-31G
ABC
5.27528 0.29389 0.29389

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.203
C2 0.000 0.000 0.275
N3 0.000 0.000 1.475
H4 0.000 1.028 -1.585
H5 0.890 -0.514 -1.585
H6 -0.890 -0.514 -1.585

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.47752.67721.09691.09691.0969
C21.47751.19972.12522.12522.1252
N32.67721.19973.22783.22783.2278
H41.09692.12523.22781.78071.7807
H51.09692.12523.22781.78071.7807
H61.09692.12523.22781.78071.7807

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 110.412
C2 C1 H5 110.412 C2 C1 H6 110.412
H4 C1 H5 108.515 H4 C1 H6 108.515
H5 C1 H6 108.514
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability