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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: CCSD(T)=FULL/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 CCSD(T)=FULL/cc-pVTZ
 hartrees
Energy at 0K-207.720531
Energy at 298.15K 
HF Energy-206.867650
Nuclear repulsion energy104.151912
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(T)=FULL/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' 3150 3018        
2 A' 3069 2940        
3 A' 2364 2265        
4 A' 1526 1462        
5 A' 1488 1426        
6 A' 1466 1405        
7 A' 1165 1116        
8 A' 896 859        
9 A' 643 616        
10 A' 173 166        
11 A" 3125 2993        
12 A" 1532 1467        
13 A" 1138 1090        
14 A" 594 569        
15 A" 34 32        

Unscaled Zero Point Vibrational Energy (zpe) 11180.9 cm-1
Scaled (by 0.958) Zero Point Vibrational Energy (zpe) 10711.3 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(T)=FULL/cc-pVTZ
ABC
2.53128 0.14669 0.14236

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)=FULL/cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.365 1.061 0.000
N2 0.000 0.600 0.000
C3 -0.566 -0.461 0.000
O4 -1.242 -1.422 0.000
H5 1.365 2.145 0.000
H6 1.891 0.714 0.886
H7 1.891 0.714 -0.886

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.44082.45933.60061.08401.08711.0871
N21.44081.20292.37302.06192.09122.0912
C32.45931.20291.17463.24412.86412.8641
O43.60062.37301.17464.41853.89393.8939
H51.08402.06193.24414.41851.76371.7637
H61.08712.09122.86413.89391.76371.7714
H71.08712.09122.86413.89391.76371.7714

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 136.764 N2 C1 H5 108.679
N2 C1 H6 110.852 N2 C1 H7 110.852
N2 C3 O4 172.955 H5 C1 H6 108.644
H5 C1 H7 108.644 H6 C1 H7 109.113
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability