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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: CCSD=FULL/6-311+G(3df,2p)

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=FULL/6-311+G(3df,2p)
 hartrees
Energy at 0K-207.717773
Energy at 298.15K 
HF Energy-206.868157
Nuclear repulsion energy104.496002
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=FULL/6-311+G(3df,2p)
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' 3177 3177 11.52      
2 A' 3084 3084 41.81      
3 A' 2399 2399 1277.50      
4 A' 1546 1546 1.51      
5 A' 1517 1517 12.08      
6 A' 1490 1490 36.01      
7 A' 1178 1178 23.56      
8 A' 905 905 28.15      
9 A' 670 670 34.02      
10 A' 160 160 21.29      
11 A" 3154 3154 15.11      
12 A" 1540 1540 7.07      
13 A" 1156 1156 0.37      
14 A" 629 629 24.61      
15 A" 38 38 1.93      

Unscaled Zero Point Vibrational Energy (zpe) 11321.9 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 11321.9 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=FULL/6-311+G(3df,2p)
ABC
2.65446 0.14661 0.14266

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD=FULL/6-311+G(3df,2p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.342 1.095 0.000
N2 0.000 0.581 0.000
C3 -0.562 -0.473 0.000
O4 -1.218 -1.439 0.000
H5 1.302 2.179 0.000
H6 1.881 0.767 0.886
H7 1.881 0.767 -0.886

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.43722.46703.60171.08511.08791.0879
N21.43721.19462.35822.06182.08762.0876
C32.46701.19461.16693.24232.87982.8798
O43.60172.35821.16694.40913.90533.9053
H51.08512.06183.24234.40911.76511.7651
H61.08792.08762.87983.90531.76511.7726
H71.08792.08762.87983.90531.76511.7726

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 139.049 N2 C1 H5 108.854
N2 C1 H6 110.771 N2 C1 H7 110.771
N2 C3 O4 173.926 H5 C1 H6 108.639
H5 C1 H7 108.639 H6 C1 H7 109.113
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability