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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: CID/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 CID/3-21G*
 hartrees
Energy at 0K-205.995870
Energy at 298.15K 
HF Energy-205.625308
Nuclear repulsion energy103.062928
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 CID/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' 3202 2980 16.01      
2 A' 3117 2900 31.98      
3 A' 2478 2306 983.19      
4 A' 1611 1499 6.06      
5 A' 1559 1451 37.86      
6 A' 1514 1409 8.59      
7 A' 1211 1127 13.38      
8 A' 841 782 47.47      
9 A' 584 543 38.50      
10 A' 126 117 18.58      
11 A" 3175 2954 20.12      
12 A" 1620 1508 7.30      
13 A" 1200 1116 0.18      
14 A" 553 515 38.32      
15 A" 46 43 6.77      

Unscaled Zero Point Vibrational Energy (zpe) 11418.4 cm-1
Scaled (by 0.9305) Zero Point Vibrational Energy (zpe) 10624.9 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 CID/3-21G*
ABC
3.63775 0.13661 0.13503

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.120 1.412 0.000
N2 0.000 0.491 0.000
C3 -0.457 -0.603 0.000
O4 -1.023 -1.656 0.000
H5 0.738 2.431 0.000
H6 1.735 1.263 0.890
H7 1.735 1.263 -0.890

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.44982.55823.74171.08871.09211.0921
N21.44981.18512.37782.07622.09702.0970
C32.55821.18511.19543.26093.01283.0128
O43.74172.37781.19544.45034.11264.1126
H51.08872.07623.26094.45031.77531.7753
H61.09212.09703.01284.11261.77531.7798
H71.09212.09703.01284.11261.77531.7798

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 152.142 N2 C1 H5 108.916
N2 C1 H6 110.384 N2 C1 H7 110.384
N2 C3 O4 174.474 H5 C1 H6 108.989
H5 C1 H7 108.989 H6 C1 H7 109.149
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability