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 CH3ONO (Methyl nitrite)

using model chemistry: mPW1PW91/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS cis 1A'
Energy calculated at mPW1PW91/6-31G**
 hartrees
Energy at 0K-244.944411
Energy at 298.15K-244.949152
Nuclear repulsion energy123.944271
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 mPW1PW91/6-31G**
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' 3221 3065 5.92      
2 A' 3086 2937 11.05      
3 A' 1746 1661 153.05      
4 A' 1505 1432 8.00      
5 A' 1454 1384 2.42      
6 A' 1200 1142 0.53      
7 A' 1052 1001 124.13      
8 A' 912 868 86.67      
9 A' 748 712 72.11      
10 A' 363 346 3.38      
11 A" 3171 3017 15.23      
12 A" 1491 1419 10.74      
13 A" 1168 1111 0.61      
14 A" 389 370 2.63      
15 A" 193 184 0.11      

Unscaled Zero Point Vibrational Energy (zpe) 10849.0 cm-1
Scaled (by 0.9515) Zero Point Vibrational Energy (zpe) 10322.8 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 mPW1PW91/6-31G**
ABC
0.68270 0.25403 0.19185

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.312 0.311 0.000
O2 0.000 0.879 0.000
H3 1.982 1.167 0.000
H4 1.468 -0.304 0.888
H5 1.468 -0.304 -0.888
N6 -1.035 -0.024 0.000
O7 -0.693 -1.161 0.000

Atom - Atom Distances (Å)
  C1 O2 H3 H4 H5 N6 O7
C11.42951.08731.09191.09192.37052.4873
O21.42952.00312.08452.08451.37332.1539
H31.08732.00311.79401.79403.24373.5464
H41.09192.08451.79401.77692.67092.4892
H51.09192.08451.79401.77692.67092.4892
N62.37051.37333.24372.67092.67091.1865
O72.48732.15393.54642.48922.48921.1865

picture of Methyl nitrite state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 O2 N6 115.493 O2 C1 H3 104.655
O2 C1 H4 110.811 O2 C1 H5 110.811
O2 N6 O7 114.388 H3 C1 H4 110.811
H3 C1 H5 110.811 H4 C1 H5 108.909
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.177      
2 O -0.351      
3 H 0.167      
4 H 0.162      
5 H 0.162      
6 N 0.313      
7 O -0.276      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.258 0.211 0.000 2.268
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.354 0.394 0.000
y 0.394 -25.105 0.000
z 0.000 0.000 -21.685
Traceless
 xyz
x 2.041 0.394 0.000
y 0.394 -3.586 0.000
z 0.000 0.000 1.544
Polar
3z2-r23.089
x2-y23.751
xy0.394
xz0.000
yz0.000


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


<r2> (average value of r2) Å2
<r2> 64.760
(<r2>)1/2 8.047