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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: QCISD/6-31G

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/6-31G
 hartrees
Energy at 0K-207.112224
Energy at 298.15K 
HF Energy-206.673674
Nuclear repulsion energy101.675672
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/6-31G
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' 3125 3011 15.87      
2 A' 3024 2914 41.11      
3 A' 2282 2199 835.15      
4 A' 1547 1491 6.33      
5 A' 1511 1456 33.96      
6 A' 1410 1359 3.87      
7 A' 1176 1133 19.13      
8 A' 825 795 34.77      
9 A' 542 522 33.76      
10 A' 174 168 19.29      
11 A" 3093 2981 22.29      
12 A" 1553 1497 7.07      
13 A" 1165 1123 0.70      
14 A" 476 458 30.00      
15 A" 79 77 5.70      

Unscaled Zero Point Vibrational Energy (zpe) 10991.1 cm-1
Scaled (by 0.9636) Zero Point Vibrational Energy (zpe) 10591.0 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 QCISD/6-31G
ABC
3.22837 0.13464 0.13255

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-31G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.220 1.334 0.000
N2 0.000 0.534 0.000
C3 -0.485 -0.576 0.000
O4 -1.123 -1.617 0.000
H5 0.937 2.395 0.000
H6 1.821 1.123 0.898
H7 1.821 1.123 -0.898

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.45892.56043.76841.09731.10131.1013
N21.45891.21142.42672.08262.11402.1140
C32.56041.21141.22113.29293.00163.0016
O43.76842.42671.22114.50924.12084.1208
H51.09732.08263.29294.50921.79071.7907
H61.10132.11403.00164.12081.79071.7963
H71.10132.11403.00164.12081.79071.7963

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 146.861 N2 C1 H5 108.288
N2 C1 H6 110.550 N2 C1 H7 110.550
N2 C3 O4 172.085 H5 C1 H6 109.067
H5 C1 H7 109.067 H6 C1 H7 109.285
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability