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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: QCISD/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 QCISD/daug-cc-pVDZ
 hartrees
Energy at 0K-207.476358
Energy at 298.15K 
HF Energy-206.817874
Nuclear repulsion energy103.217936
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 QCISD/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' 3153 3153 14.18      
2 A' 3052 3052 47.61      
3 A' 2295 2295 1102.04      
4 A' 1499 1499 3.18      
5 A' 1463 1463 15.68      
6 A' 1441 1441 36.63      
7 A' 1152 1152 24.90      
8 A' 896 896 27.16      
9 A' 657 657 28.07      
10 A' 183 183 19.02      
11 A" 3128 3128 19.44      
12 A" 1504 1504 5.43      
13 A" 1130 1130 0.56      
14 A" 594 594 19.84      
15 A" 61 61 1.53      

Unscaled Zero Point Vibrational Energy (zpe) 11103.1 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 11103.1 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 QCISD/daug-cc-pVDZ
ABC
2.25543 0.14641 0.14124

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.415 0.995 0.000
N2 0.000 0.635 0.000
C3 -0.589 -0.432 0.000
O4 -1.285 -1.390 0.000
H5 1.490 2.091 0.000
H6 1.917 0.604 0.899
H7 1.917 0.604 -0.899

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.46002.45993.60211.09841.10141.1014
N21.46001.21882.39792.08302.11762.1176
C32.45991.21881.18383.26892.85662.8566
O43.60212.39791.18384.45103.87753.8775
H51.09842.08303.26894.45101.78931.7893
H61.10142.11762.85663.87751.78931.7979
H71.10142.11762.85663.87751.78931.7979

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 133.152 N2 C1 H5 108.182
N2 C1 H6 110.748 N2 C1 H7 110.748
N2 C3 O4 172.845 H5 C1 H6 108.854
H5 C1 H7 108.854 H6 C1 H7 109.405
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability