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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: CCD/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes Cs 1A'
Energy calculated at CCD/3-21G*
 hartrees
Energy at 0K-206.041418
Energy at 298.15K 
HF Energy-205.623161
Nuclear repulsion energy102.565375
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 CCD/3-21G*
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' 3125 2989 16.31      
2 A' 3040 2907 33.26      
3 A' 2410 2305 876.06      
4 A' 1578 1510 5.77      
5 A' 1523 1457 36.01      
6 A' 1475 1411 9.58      
7 A' 1182 1130 16.65      
8 A' 830 794 39.15      
9 A' 571 546 31.04      
10 A' 145 139 19.47      
11 A" 3096 2961 20.55      
12 A" 1588 1519 6.72      
13 A" 1169 1118 0.13      
14 A" 526 503 29.79      
15 A" 58 55 5.33      

Unscaled Zero Point Vibrational Energy (zpe) 11157.1 cm-1
Scaled (by 0.9565) Zero Point Vibrational Energy (zpe) 10671.8 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 CCD/3-21G*
ABC
3.24811 0.13694 0.13479

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.226 1.315 0.000
N2 0.000 0.523 0.000
C3 -0.497 -0.565 0.000
O4 -1.122 -1.591 0.000
H5 0.958 2.377 0.000
H6 1.824 1.097 0.895
H7 1.824 1.097 -0.895

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.45952.55033.73601.09491.09851.0985
N21.45951.19612.39312.08702.11182.1118
C32.55031.19611.20123.28222.99262.9926
O43.73602.39311.20124.48014.08794.0879
H51.09492.08703.28224.48011.78541.7854
H61.09852.11182.99264.08791.78541.7900
H71.09852.11182.99264.08791.78541.7900

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 147.452 N2 C1 H5 108.736
N2 C1 H6 110.496 N2 C1 H7 110.496
N2 C3 O4 173.234 H5 C1 H6 108.977
H5 C1 H7 108.977 H6 C1 H7 109.125
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability