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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: QCISD(T)=FULL/daug-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(T)=FULL/daug-cc-pVTZ
 hartrees
Energy at 0K-207.754641
Energy at 298.15K 
HF Energy-206.870764
Nuclear repulsion energy104.040109
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/daug-cc-pVTZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3140 3140        
2 A' 3064 3064        
3 A' 2343 2343        
4 A' 1526 1526        
5 A' 1484 1484        
6 A' 1463 1463        
7 A' 1166 1166        
8 A' 887 887        
9 A' 641 641        
10 A' 166 166        
11 A" 3118 3118        
12 A" 1533 1533        
13 A" 1143 1143        
14 A" 594 594        
15 A" 49 49        

Unscaled Zero Point Vibrational Energy (zpe) 11158.6 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 11158.6 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/daug-cc-pVTZ
ABC
2.62734 0.14551 0.14155

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.348 1.096 0.000
N2 0.000 0.588 0.000
C3 -0.558 -0.476 0.000
O4 -1.227 -1.443 0.000
H5 1.311 2.181 0.000
H6 1.884 0.763 0.887
H7 1.884 0.763 -0.887

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.44062.47073.61651.08601.08871.0887
N21.44061.20172.37322.06322.08962.0896
C32.47071.20171.17603.24882.87832.8783
O43.61652.37321.17604.42483.91563.9156
H51.08602.06323.24884.42481.76831.7683
H61.08872.08962.87833.91561.76831.7750
H71.08872.08962.87833.91561.76831.7750

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 138.301 N2 C1 H5 108.681
N2 C1 H6 110.641 N2 C1 H7 110.641
N2 C3 O4 172.978 H5 C1 H6 108.812
H5 C1 H7 108.812 H6 C1 H7 109.210
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability