return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: TPSSh/aug-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 TPSSh/aug-cc-pVTZ
 hartrees
Energy at 0K-208.077129
Energy at 298.15K 
HF Energy-208.077129
Nuclear repulsion energy103.936903
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 TPSSh/aug-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' 3120 3011 14.73 72.78 0.63 0.77
2 A' 3029 2923 47.48 222.60 0.01 0.03
3 A' 2347 2265 1034.01 1.62 0.06 0.12
4 A' 1513 1460 1.84 4.28 0.34 0.51
5 A' 1482 1430 14.98 11.35 0.37 0.54
6 A' 1449 1399 32.08 24.17 0.19 0.31
7 A' 1156 1116 20.09 0.73 0.75 0.86
8 A' 868 838 29.39 9.20 0.11 0.20
9 A' 637 615 25.93 0.63 0.46 0.63
10 A' 175 169 16.59 2.26 0.62 0.76
11 A" 3090 2983 20.33 73.25 0.75 0.86
12 A" 1516 1463 5.95 7.42 0.75 0.86
13 A" 1129 1090 0.17 0.32 0.75 0.86
14 A" 586 565 17.88 0.57 0.75 0.86
15 A" 48 47 1.80 0.71 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 11072.1 cm-1
Scaled (by 0.9652) Zero Point Vibrational Energy (zpe) 10686.8 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 TPSSh/aug-cc-pVTZ
ABC
2.65285 0.14494 0.14111

See section I.F.4 to change rotational constant units
Geometric Data calculated at TPSSh/aug-cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.345 1.106 0.000
N2 0.000 0.583 0.000
C3 -0.557 -0.481 0.000
O4 -1.225 -1.449 0.000
H5 1.294 2.193 0.000
H6 1.886 0.780 0.890
H7 1.886 0.780 -0.890

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.44322.47703.62371.08841.09181.0918
N21.44321.20092.37262.06552.09512.0951
C32.47701.20091.17613.25202.88972.8897
O43.62372.37261.17614.42813.92903.9290
H51.08842.06553.25204.42811.77261.7726
H61.09182.09512.88973.92901.77261.7805
H71.09182.09512.88973.92901.77261.7805

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 138.868 N2 C1 H5 108.536
N2 C1 H6 110.714 N2 C1 H7 110.714
N2 C3 O4 173.041 H5 C1 H6 108.788
H5 C1 H7 108.788 H6 C1 H7 109.251
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at TPSSh/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.083      
2 N 0.069      
3 C -0.146      
4 O -0.333      
5 H 0.163      
6 H 0.165      
7 H 0.165      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.496 1.557 0.000 2.942
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.727 1.919 0.000
y 1.919 6.367 0.000
z 0.000 0.000 3.950


<r2> (average value of r2) Å2
<r2> 83.613
(<r2>)1/2 9.144