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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: QCISD(T)/cc-pVDZ

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(T)/cc-pVDZ
 hartrees
Energy at 0K-207.457472
Energy at 298.15K 
HF Energy-206.802981
Nuclear repulsion energy103.055029
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(T)/cc-pVDZ
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' 3160 3012        
2 A' 3049 2906        
3 A' 2312 2204        
4 A' 1492 1422        
5 A' 1453 1385        
6 A' 1441 1373        
7 A' 1147 1094        
8 A' 902 860        
9 A' 641 611        
10 A' 189 180        
11 A" 3130 2983        
12 A" 1499 1428        
13 A" 1118 1066        
14 A" 569 542        
15 A" 40 38        

Unscaled Zero Point Vibrational Energy (zpe) 11071.3 cm-1
Scaled (by 0.9531) Zero Point Vibrational Energy (zpe) 10552.1 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(T)/cc-pVDZ
ABC
2.17528 0.14698 0.14145

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.423 0.969 0.000
N2 0.000 0.650 0.000
C3 -0.590 -0.425 0.000
O4 -1.298 -1.376 0.000
H5 1.534 2.066 0.000
H6 1.923 0.566 0.900
H7 1.923 0.566 -0.900

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.45862.44873.59241.10221.10571.1057
N21.45861.22652.40642.08732.12492.1249
C32.44871.22651.18573.27342.84712.8471
O43.59242.40641.18574.45723.86733.8673
H51.10222.08733.27344.45721.79181.7918
H61.10572.12492.84713.86731.79181.8006
H71.10572.12492.84713.86731.79181.8006

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 131.356 N2 C1 H5 108.395
N2 C1 H6 111.175 N2 C1 H7 111.175
N2 C3 O4 172.046 H5 C1 H6 108.499
H5 C1 H7 108.499 H6 C1 H7 109.019
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability