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/aug-cc-pVDZ

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/aug-cc-pVDZ
 hartrees
Energy at 0K-207.466899
Energy at 298.15K 
HF Energy-206.815422
Nuclear repulsion energy102.963507
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/aug-cc-pVDZ
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' 3202 3104 9.70 62.49 0.67 0.80
2 A' 3085 2990 48.18 200.25 0.01 0.02
3 A' 2331 2259 951.31 1.56 0.32 0.49
4 A' 1499 1453 5.05 3.73 0.44 0.62
5 A' 1458 1413 15.98 10.66 0.36 0.53
6 A' 1437 1393 33.35 25.54 0.20 0.33
7 A' 1153 1118 22.59 0.73 0.68 0.81
8 A' 886 858 24.11 20.04 0.13 0.22
9 A' 632 613 23.97 0.56 0.57 0.73
10 A' 185 180 19.46 2.40 0.66 0.80
11 A" 3175 3077 14.21 60.17 0.75 0.86
12 A" 1504 1458 6.46 6.69 0.75 0.86
13 A" 1132 1097 0.19 0.30 0.75 0.86
14 A" 574 556 14.47 0.39 0.75 0.86
15 A" 70 68 1.70 1.03 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 11160.9 cm-1
Scaled (by 0.9692) Zero Point Vibrational Energy (zpe) 10817.1 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/aug-cc-pVDZ
ABC
2.42082 0.14403 0.13959

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/aug-cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.384 1.059 0.000
N2 0.000 0.619 0.000
C3 -0.569 -0.463 0.000
O4 -1.262 -1.431 0.000
H5 1.396 2.154 0.000
H6 1.906 0.697 0.897
H7 1.906 0.697 -0.897

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.45222.47603.63351.09561.09901.0990
N21.45221.22242.40742.07532.10802.1080
C32.47601.22241.19063.27302.87712.8771
O43.63352.40741.19064.46343.92093.9209
H51.09562.07533.27304.46341.78541.7854
H61.09902.10802.87713.92091.78541.7938
H71.09902.10802.87713.92091.78541.7938

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 135.389 N2 C1 H5 108.277
N2 C1 H6 110.678 N2 C1 H7 110.678
N2 C3 O4 172.142 H5 C1 H6 108.887
H5 C1 H7 108.887 H6 C1 H7 109.388
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability