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: PBEPBE/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 PBEPBE/cc-pVTZ
 hartrees
Energy at 0K-207.830228
Energy at 298.15K 
HF Energy-207.830228
Nuclear repulsion energy103.506661
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 PBEPBE/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' 3048 3027 14.17 83.68 0.63 0.77
2 A' 2959 2938 49.05 211.26 0.02 0.04
3 A' 2328 2312 845.31 1.92 0.01 0.02
4 A' 1468 1458 1.30 10.17 0.13 0.24
5 A' 1434 1424 11.13 18.72 0.54 0.70
6 A' 1404 1394 30.06 23.32 0.30 0.46
7 A' 1115 1108 14.94 1.26 0.65 0.79
8 A' 865 859 24.10 6.78 0.17 0.29
9 A' 614 609 22.23 0.55 0.73 0.84
10 A' 177 176 15.23 2.44 0.59 0.74
11 A" 3018 2997 20.00 82.75 0.75 0.86
12 A" 1453 1443 6.20 12.66 0.75 0.86
13 A" 1089 1081 0.03 1.07 0.75 0.86
14 A" 560 556 15.97 0.54 0.75 0.86
15 A" 46 46 1.73 0.74 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 10788.9 cm-1
Scaled (by 0.9931) Zero Point Vibrational Energy (zpe) 10714.5 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 PBEPBE/cc-pVTZ
ABC
2.66430 0.14370 0.13999

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.335 1.122 0.000
N2 0.000 0.586 0.000
C3 -0.551 -0.490 0.000
O4 -1.220 -1.466 0.000
H5 1.280 2.217 0.000
H6 1.892 0.805 0.894
H7 1.892 0.805 -0.894

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.43842.48083.63651.09651.10001.1000
N21.43841.20832.38682.07372.10392.1039
C32.48081.20831.18333.26802.90612.9061
O43.63652.38681.18334.45133.95513.9551
H51.09652.07373.26804.45131.77961.7796
H61.10002.10392.90613.95511.77961.7878
H71.10002.10392.90613.95511.77961.7878

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 139.047 N2 C1 H5 109.036
N2 C1 H6 111.266 N2 C1 H7 111.266
N2 C3 O4 172.713 H5 C1 H6 108.232
H5 C1 H7 108.232 H6 C1 H7 108.712
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.158      
2 N -0.137      
3 C 0.186      
4 O -0.208      
5 H 0.110      
6 H 0.104      
7 H 0.104      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.362 1.497 0.000 2.796
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.498 -0.445 0.000
y -0.445 -24.624 0.000
z 0.000 0.000 -22.663
Traceless
 xyz
x 1.146 -0.445 0.000
y -0.445 -2.044 0.000
z 0.000 0.000 0.898
Polar
3z2-r21.796
x2-y22.127
xy-0.445
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.315 1.980 0.000
y 1.980 6.027 0.000
z 0.000 0.000 3.522


<r2> (average value of r2) Å2
<r2> 84.139
(<r2>)1/2 9.173