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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: QCISD(T)=FULL/aug-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)=FULL/aug-cc-pVDZ
 hartrees
Energy at 0K-207.510195
Energy at 298.15K 
HF Energy-206.815271
Nuclear repulsion energy102.895097
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)=FULL/aug-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' 3147 3053        
2 A' 3040 2949        
3 A' 2264 2197        
4 A' 1487 1442        
5 A' 1447 1403        
6 A' 1423 1381        
7 A' 1143 1109        
8 A' 883 856        
9 A' 640 621        
10 A' 192 186        
11 A" 3118 3025        
12 A" 1493 1448        
13 A" 1119 1086        
14 A" 572 555        
15 A" 59 57        

Unscaled Zero Point Vibrational Energy (zpe) 11013.4 cm-1
Scaled (by 0.9701) Zero Point Vibrational Energy (zpe) 10684.1 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)=FULL/aug-cc-pVDZ
ABC
2.24959 0.14549 0.14037

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.417 1.000 0.000
N2 0.000 0.638 0.000
C3 -0.586 -0.437 0.000
O4 -1.289 -1.395 0.000
H5 1.490 2.097 0.000
H6 1.919 0.608 0.900
H7 1.919 0.608 -0.900

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.46212.46453.61391.09941.10291.1029
N21.46211.22432.40802.08522.12012.1201
C32.46451.22431.18923.27552.85952.8595
O43.61392.40801.18924.46353.88843.8884
H51.09942.08523.27554.46351.79191.7919
H61.10292.12012.85953.88841.79191.8003
H71.10292.12012.85953.88841.79191.8003

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 132.893 N2 C1 H5 108.156
N2 C1 H6 110.712 N2 C1 H7 110.712
N2 C3 O4 172.299 H5 C1 H6 108.906
H5 C1 H7 108.906 H6 C1 H7 109.402
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability