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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: CISD/daug-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 CISD/daug-cc-pVDZ
 hartrees
Energy at 0K-207.382978
Energy at 298.15K 
HF Energy-206.820842
Nuclear repulsion energy104.120101
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 CISD/daug-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' 3243 3243 14.48      
2 A' 3141 3141 46.74      
3 A' 2399 2399 1382.63      
4 A' 1556 1556 2.67      
5 A' 1524 1524 11.20      
6 A' 1495 1495 44.58      
7 A' 1190 1190 26.68      
8 A' 925 925 32.63      
9 A' 691 691 36.51      
10 A' 174 174 21.12      
11 A" 3218 3218 19.43      
12 A" 1549 1549 6.14      
13 A" 1168 1168 0.58      
14 A" 639 639 27.38      
15 A" 55 55 1.75      

Unscaled Zero Point Vibrational Energy (zpe) 11483.4 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 11483.4 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 CISD/daug-cc-pVDZ
ABC
2.39927 0.14769 0.14291

See section I.F.4 to change rotational constant units
Geometric Data calculated at CISD/daug-cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.389 1.023 0.000
N2 0.000 0.611 0.000
C3 -0.583 -0.442 0.000
O4 -1.258 -1.398 0.000
H5 1.426 2.113 0.000
H6 1.903 0.653 0.892
H7 1.903 0.653 -0.892

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.44872.45683.58691.09041.09351.0935
N21.44871.20402.37032.07032.10172.1017
C32.45681.20401.16993.24992.85932.8593
O43.58692.37031.16994.41863.87203.8720
H51.09042.07033.24994.41861.77551.7755
H61.09352.10172.85933.87201.77551.7840
H71.09352.10172.85933.87201.77551.7840

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 135.489 N2 C1 H5 108.427
N2 C1 H6 110.752 N2 C1 H7 110.752
N2 C3 O4 173.768 H5 C1 H6 108.772
H5 C1 H7 108.772 H6 C1 H7 109.315
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability