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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: CCSD/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 CCSD/6-31G**
 hartrees
Energy at 0K-207.417299
Energy at 298.15K 
HF Energy-206.792966
Nuclear repulsion energy103.639458
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 CCSD/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' 3223 3006 17.56      
2 A' 3118 2908 44.42      
3 A' 2395 2233 1022.46      
4 A' 1560 1455 2.20      
5 A' 1522 1419 13.09      
6 A' 1508 1406 43.22      
7 A' 1189 1109 24.31      
8 A' 910 848 30.80      
9 A' 642 598 32.26      
10 A' 172 160 19.64      
11 A" 3197 2981 23.02      
12 A" 1565 1460 3.94      
13 A" 1162 1083 0.62      
14 A" 585 545 29.55      
15 A" 57 54 2.55      

Unscaled Zero Point Vibrational Energy (zpe) 11400.8 cm-1
Scaled (by 0.9326) Zero Point Vibrational Energy (zpe) 10632.3 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 CCSD/6-31G**
ABC
2.52944 0.14507 0.14085

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.367 1.074 0.000
N2 0.000 0.602 0.000
C3 -0.565 -0.466 0.000
O4 -1.245 -1.435 0.000
H5 1.355 2.161 0.000
H6 1.896 0.729 0.888
H7 1.896 0.729 -0.888

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.44642.47143.62151.08671.08981.0898
N21.44641.20852.38662.06592.09782.0978
C32.47141.20851.18283.25442.87722.8772
O43.62152.38661.18284.43713.91633.9163
H51.08672.06593.25444.43711.76921.7692
H61.08982.09782.87723.91631.76921.7761
H71.08982.09782.87723.91631.76921.7761

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 136.961 N2 C1 H5 108.449
N2 C1 H6 110.832 N2 C1 H7 110.832
N2 C3 O4 172.837 H5 C1 H6 108.757
H5 C1 H7 108.757 H6 C1 H7 109.161
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability