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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: MP2=FULL/aug-cc-pVTZ

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-pVTZ
 hartrees
Energy at 0K-207.702821
Energy at 298.15K 
HF Energy-206.870215
Nuclear repulsion energy104.053870
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-pVTZ
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' 3189 3034 7.39 63.06 0.66 0.79
2 A' 3097 2946 43.05 209.32 0.01 0.02
3 A' 2397 2280 1019.36 1.46 0.01 0.02
4 A' 1535 1460 4.94 5.14 0.32 0.49
5 A' 1499 1426 10.77 28.15 0.25 0.41
6 A' 1473 1401 33.64 14.64 0.22 0.36
7 A' 1170 1113 19.27 0.49 0.70 0.82
8 A' 889 846 24.88 16.50 0.13 0.22
9 A' 634 603 25.26 0.42 0.65 0.78
10 A' 169 161 19.60 2.05 0.68 0.81
11 A" 3167 3013 10.48 59.89 0.75 0.86
12 A" 1542 1467 7.48 6.51 0.75 0.86
13 A" 1151 1095 0.11 0.18 0.75 0.86
14 A" 593 564 15.68 0.46 0.75 0.86
15 A" 82 78 2.03 0.99 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 11291.7 cm-1
Scaled (by 0.9514) Zero Point Vibrational Energy (zpe) 10742.9 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-pVTZ
ABC
2.86111 0.14385 0.14057

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.297 1.170 0.000
N2 0.000 0.566 0.000
C3 -0.535 -0.508 0.000
O4 -1.183 -1.492 0.000
H5 1.182 2.247 0.000
H6 1.855 0.878 0.885
H7 1.855 0.878 -0.885

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.43082.48453.63821.08331.08601.0860
N21.43081.20002.37412.05452.07862.0786
C32.48451.20001.17833.24592.90092.9009
O43.63822.37411.17834.42403.95303.9530
H51.08332.05453.24594.42401.76391.7639
H61.08602.07862.90093.95301.76391.7698
H71.08602.07862.90093.95301.76391.7698

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 141.451 N2 C1 H5 108.822
N2 C1 H6 110.612 N2 C1 H7 110.612
N2 C3 O4 173.178 H5 C1 H6 108.804
H5 C1 H7 108.804 H6 C1 H7 109.146
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability