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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: MP2=FULL/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes Cs 1A'
Energy calculated at MP2=FULL/STO-3G
 hartrees
Energy at 0K-204.348360
Energy at 298.15K 
HF Energy-204.075588
Nuclear repulsion energy100.382306
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/STO-3G
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' 3539 3146 0.29 34.04 0.71 0.83
2 A' 3346 2974 8.09 42.06 0.00 0.01
3 A' 2421 2152 145.85 1.39 0.52 0.68
4 A' 1697 1509 4.84 14.59 0.74 0.85
5 A' 1603 1425 36.61 7.78 0.73 0.84
6 A' 1425 1267 47.68 4.69 0.35 0.52
7 A' 1222 1087 21.28 3.44 0.50 0.67
8 A' 919 817 3.97 19.84 0.20 0.33
9 A' 591 525 10.93 1.42 0.75 0.86
10 A' 222 197 13.66 0.98 0.60 0.75
11 A" 3514 3124 1.78 26.60 0.75 0.86
12 A" 1702 1512 2.91 19.36 0.75 0.86
13 A" 1194 1062 1.28 2.23 0.75 0.86
14 A" 449 399 7.76 0.19 0.75 0.86
15 A" 128 114 1.86 0.69 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 11986.8 cm-1
Scaled (by 0.8889) Zero Point Vibrational Energy (zpe) 10655.0 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 MP2=FULL/STO-3G
ABC
1.98671 0.14143 0.13552

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/STO-3G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.487 0.925 0.000
N2 0.000 0.701 0.000
C3 -0.556 -0.448 0.000
O4 -1.396 -1.346 0.000
H5 1.665 2.018 0.000
H6 1.961 0.488 0.903
H7 1.961 0.488 -0.903

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.50342.46193.67001.10711.10991.1099
N21.50341.27722.47782.12252.16962.1696
C32.46191.27721.22913.31902.83352.8335
O43.67002.47781.22914.54803.93053.9305
H51.10712.12253.31904.54801.80151.8015
H61.10992.16962.83353.93051.80151.8053
H71.10992.16962.83353.93051.80151.8053

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 124.389 N2 C1 H5 107.827
N2 C1 H6 111.350 N2 C1 H7 111.350
N2 C3 O4 162.699 H5 C1 H6 108.703
H5 C1 H7 108.703 H6 C1 H7 108.835
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability