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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: CCSD=FULL/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes Cs 1A'
Energy calculated at CCSD=FULL/6-31G(2df,p)
 hartrees
Energy at 0K-207.571318
Energy at 298.15K 
HF Energy-206.814819
Nuclear repulsion energy104.406812
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 CCSD=FULL/6-31G(2df,p)
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' 3199 3012 11.10      
2 A' 3105 2924 36.05      
3 A' 2468 2324 1113.78      
4 A' 1571 1479 2.00      
5 A' 1534 1444 9.39      
6 A' 1502 1415 36.96      
7 A' 1187 1118 18.72      
8 A' 900 847 28.07      
9 A' 669 630 33.51      
10 A' 127 119 20.76      
11 A" 3179 2994 13.81      
12 A" 1553 1463 5.54      
13 A" 1168 1100 0.11      
14 A" 648 610 26.95      
15 A" 43i 40i 2.61      

Unscaled Zero Point Vibrational Energy (zpe) 11383.2 cm-1
Scaled (by 0.9416) Zero Point Vibrational Energy (zpe) 10718.4 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 CCSD=FULL/6-31G(2df,p)
ABC
3.00696 0.14386 0.14093

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD=FULL/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.267 1.205 0.000
N2 0.000 0.544 0.000
C3 -0.530 -0.521 0.000
O4 -1.153 -1.510 0.000
H5 1.109 2.281 0.000
H6 1.844 0.941 0.887
H7 1.844 0.941 -0.887

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.42932.49153.63711.08741.09001.0900
N21.42931.18942.35572.06032.08382.0838
C32.49151.18941.16923.24542.92472.9247
O43.63712.35571.16924.41413.97113.9711
H51.08742.06033.24544.41411.76701.7670
H61.09002.08382.92473.97111.76701.7732
H71.09002.08382.92473.97111.76701.7732

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 143.976 N2 C1 H5 109.139
N2 C1 H6 110.895 N2 C1 H7 110.895
N2 C3 O4 174.247 H5 C1 H6 108.489
H5 C1 H7 108.489 H6 C1 H7 108.869
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability