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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: MP2=FULL/TZVP

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/TZVP
 hartrees
Energy at 0K-207.573968
Energy at 298.15K 
HF Energy-206.858098
Nuclear repulsion energy103.877466
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/TZVP
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' 3210 3058 11.32 72.17 0.65 0.79
2 A' 3095 2949 46.36 168.94 0.01 0.02
3 A' 2391 2278 934.79 0.89 0.17 0.30
4 A' 1532 1460 2.46 6.40 0.63 0.77
5 A' 1499 1428 28.59 8.14 0.74 0.85
6 A' 1477 1407 26.89 35.55 0.26 0.41
7 A' 1183 1128 21.12 3.32 0.61 0.76
8 A' 892 850 29.03 16.72 0.17 0.29
9 A' 639 609 26.13 0.60 0.56 0.72
10 A' 181 172 19.70 2.47 0.73 0.84
11 A" 3180 3029 17.26 63.31 0.75 0.86
12 A" 1526 1454 6.25 14.53 0.75 0.86
13 A" 1158 1103 0.46 2.09 0.75 0.86
14 A" 592 564 21.79 0.57 0.75 0.86
15 A" 77 73 2.38 1.86 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 11315.2 cm-1
Scaled (by 0.9527) Zero Point Vibrational Energy (zpe) 10780.0 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/TZVP
ABC
2.53665 0.14578 0.14153

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/TZVP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.362 1.073 0.000
N2 0.000 0.601 0.000
C3 -0.566 -0.465 0.000
O4 -1.238 -1.434 0.000
H5 1.352 2.159 0.000
H6 1.890 0.727 0.887
H7 1.890 0.727 -0.887

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.44132.46583.61211.08521.08881.0888
N21.44131.20642.38212.06302.09132.0913
C32.46581.20641.17993.24982.86982.8698
O43.61212.38211.17994.42943.90433.9043
H51.08522.06303.24984.42941.76741.7674
H61.08882.09132.86983.90431.76741.7741
H71.08882.09132.86983.90431.76741.7741

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 137.099 N2 C1 H5 108.660
N2 C1 H6 110.728 N2 C1 H7 110.728
N2 C3 O4 173.181 H5 C1 H6 108.776
H5 C1 H7 108.776 H6 C1 H7 109.127
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability