return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: MP2=FULL/6-31+G**

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/6-31+G**
 hartrees
Energy at 0K-207.432634
Energy at 298.15K 
HF Energy-206.796222
Nuclear repulsion energy103.243771
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/6-31+G**
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' 3255 3057 9.61 71.73 0.69 0.82
2 A' 3133 2943 50.14 161.15 0.01 0.02
3 A' 2376 2231 944.04 1.23 0.33 0.50
4 A' 1551 1456 5.69 7.47 0.74 0.85
5 A' 1507 1415 31.47 6.89 0.75 0.85
6 A' 1475 1385 18.65 36.37 0.25 0.40
7 A' 1185 1113 23.47 2.44 0.65 0.79
8 A' 889 835 28.75 19.48 0.15 0.26
9 A' 615 577 25.23 0.73 0.58 0.73
10 A' 178 167 20.49 2.76 0.75 0.86
11 A" 3226 3030 15.24 68.26 0.75 0.86
12 A" 1553 1459 5.96 13.56 0.75 0.86
13 A" 1159 1088 0.41 1.48 0.75 0.86
14 A" 572 538 20.75 0.44 0.75 0.86
15 A" 76 72 2.78 1.91 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 11374.3 cm-1
Scaled (by 0.9392) Zero Point Vibrational Energy (zpe) 10682.7 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/6-31+G**
ABC
2.59144 0.14338 0.13944

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.353 1.106 0.000
N2 0.000 0.600 0.000
C3 -0.554 -0.481 0.000
O4 -1.234 -1.461 0.000
H5 1.312 2.190 0.000
H6 1.885 0.773 0.888
H7 1.885 0.773 -0.888

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.44412.48123.64431.08441.08781.0878
N21.44411.21542.40242.06092.09112.0911
C32.48121.21541.19243.25842.88322.8832
O43.64432.40241.19244.45073.93793.9379
H51.08442.06093.25844.45071.76811.7681
H61.08782.09112.88323.93791.76811.7753
H71.08782.09112.88323.93791.76811.7753

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 137.643 N2 C1 H5 108.345
N2 C1 H6 110.572 N2 C1 H7 110.572
N2 C3 O4 172.385 H5 C1 H6 108.967
H5 C1 H7 108.967 H6 C1 H7 109.379
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability