return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: CCSD/6-311G**

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/6-311G**
 hartrees
Energy at 0K-207.499785
Energy at 298.15K 
HF Energy-206.843201
Nuclear repulsion energy104.042298
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/6-311G**
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3166 3166 17.22      
2 A' 3066 3066 44.85      
3 A' 2380 2380 1088.86      
4 A' 1531 1531 2.37      
5 A' 1501 1501 9.66      
6 A' 1485 1485 46.45      
7 A' 1173 1173 23.47      
8 A' 911 911 30.54      
9 A' 667 667 30.98      
10 A' 176 176 19.71      
11 A" 3136 3136 24.73      
12 A" 1532 1532 5.38      
13 A" 1149 1149 0.55      
14 A" 610 610 27.25      
15 A" 52 52 2.11      

Unscaled Zero Point Vibrational Energy (zpe) 11267.4 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 11267.4 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 CCSD/6-311G**
ABC
2.35326 0.14796 0.14300

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD/6-311G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.398 1.007 0.000
N2 0.000 0.618 0.000
C3 -0.585 -0.437 0.000
O4 -1.268 -1.388 0.000
H5 1.453 2.097 0.000
H6 1.907 0.629 0.892
H7 1.907 0.629 -0.892

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.45072.45253.58331.09121.09481.0948
N21.45071.20612.37292.07332.10572.1057
C32.45251.20611.17093.25162.85362.8536
O43.58332.37291.17094.42123.86593.8659
H51.09122.07333.25164.42121.77681.7768
H61.09482.10572.85363.86591.77681.7841
H71.09482.10572.85363.86591.77681.7841

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 134.566 N2 C1 H5 108.470
N2 C1 H6 110.855 N2 C1 H7 110.855
N2 C3 O4 173.336 H5 C1 H6 108.735
H5 C1 H7 108.735 H6 C1 H7 109.137
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability