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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: QCISD(T)=FULL/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/cc-pVDZ
 hartrees
Energy at 0K-207.466481
Energy at 298.15K 
HF Energy-206.803276
Nuclear repulsion energy103.116540
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/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' 3166 3036        
2 A' 3055 2930        
3 A' 2319 2224        
4 A' 1495 1434        
5 A' 1456 1396        
6 A' 1445 1386        
7 A' 1149 1102        
8 A' 903 866        
9 A' 641 615        
10 A' 188 181        
11 A" 3136 3007        
12 A" 1501 1439        
13 A" 1120 1074        
14 A" 570 547        
15 A" 41 39        

Unscaled Zero Point Vibrational Energy (zpe) 11092.5 cm-1
Scaled (by 0.959) Zero Point Vibrational Energy (zpe) 10637.7 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/cc-pVDZ
ABC
2.19939 0.14690 0.14147

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.419 0.976 0.000
N2 0.000 0.647 0.000
C3 -0.588 -0.428 0.000
O4 -1.294 -1.380 0.000
H5 1.522 2.073 0.000
H6 1.921 0.578 0.899
H7 1.921 0.578 -0.899

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.45672.44963.59351.10121.10471.1047
N21.45671.22532.40482.08562.12262.1226
C32.44961.22531.18523.27212.84902.8490
O43.59352.40481.18524.45563.87043.8704
H51.10122.08563.27214.45561.79001.7900
H61.10472.12262.84903.87041.79001.7986
H71.10472.12262.84903.87041.79001.7986

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 131.748 N2 C1 H5 108.445
N2 C1 H6 111.184 N2 C1 H7 111.184
N2 C3 O4 172.097 H5 C1 H6 108.479
H5 C1 H7 108.479 H6 C1 H7 108.992
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability