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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: QCISD/aug-cc-pVTZ

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/aug-cc-pVTZ
 hartrees
Energy at 0K-207.641838
Energy at 298.15K 
HF Energy-206.870766
Nuclear repulsion energy104.117456
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/aug-cc-pVTZ
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' 3159 3041 11.52      
2 A' 3065 2949 41.91      
3 A' 2343 2255 1164.00      
4 A' 1529 1472 3.11      
5 A' 1495 1439 13.44      
6 A' 1475 1420 34.94      
7 A' 1171 1127 23.59      
8 A' 896 863 28.02      
9 A' 660 635 31.17      
10 A' 169 162 20.17      
11 A" 3135 3017 15.49      
12 A" 1534 1477 6.53      
13 A" 1148 1105 0.42      
14 A" 609 586 21.84      
15 A" 46 44 1.70      

Unscaled Zero Point Vibrational Energy (zpe) 11217.3 cm-1
Scaled (by 0.9624) Zero Point Vibrational Energy (zpe) 10795.5 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/aug-cc-pVTZ
ABC
2.49830 0.14681 0.14238

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.373 1.053 0.000
N2 0.000 0.601 0.000
C3 -0.572 -0.455 0.000
O4 -1.247 -1.416 0.000
H5 1.380 2.139 0.000
H6 1.895 0.698 0.888
H7 1.895 0.698 -0.888

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.44542.46123.59951.08671.08961.0896
N21.44541.20132.37102.06692.09512.0951
C32.46121.20131.17373.24732.86472.8647
O43.59952.37101.17374.42053.88963.8896
H51.08672.06693.24734.42051.76941.7694
H61.08962.09512.86473.88961.76941.7769
H71.08962.09512.86473.88961.76941.7769

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 136.654 N2 C1 H5 108.599
N2 C1 H6 110.692 N2 C1 H7 110.692
N2 C3 O4 173.354 H5 C1 H6 108.782
H5 C1 H7 108.782 H6 C1 H7 109.246
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability