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 HNCNH (diiminomethane)

using model chemistry: HF/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at HF/cc-pVTZ
 hartrees
Energy at 0K-147.958944
Energy at 298.15K-147.961499
HF Energy-147.958944
Nuclear repulsion energy61.091239
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 HF/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 3803 3461 34.08      
2 A 1375 1252 0.06      
3 A 1029 937 16.05      
4 A 816 743 108.71      
5 A 595 542 0.16      
6 B 3797 3456 188.78      
7 B 2327 2117 980.09      
8 B 1019 927 487.52      
9 B 596 543 110.71      

Unscaled Zero Point Vibrational Energy (zpe) 7678.6 cm-1
Scaled (by 0.9101) Zero Point Vibrational Energy (zpe) 6988.3 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 HF/cc-pVTZ
ABC
12.34111 0.35817 0.35808

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

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.007
N2 0.000 1.202 0.072
N3 0.000 -1.202 0.072
H4 -0.626 1.699 -0.526
H5 0.626 -1.699 -0.526

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5
C11.20391.20391.88691.8869
N21.20392.40430.99773.0272
N31.20392.40433.02720.9977
H41.88690.99773.02723.6205
H51.88693.02720.99773.6205

picture of diiminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H4 117.669 C1 N3 H5 117.669
N2 C1 N3 173.761
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.248      
2 N -0.331      
3 N -0.331      
4 H 0.207      
5 H 0.207      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -2.192 2.192
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.707 -4.250 0.000
y -4.250 -17.293 0.000
z 0.000 0.000 -17.199
Traceless
 xyz
x 0.539 -4.250 0.000
y -4.250 -0.340 0.000
z 0.000 0.000 -0.199
Polar
3z2-r2-0.398
x2-y20.586
xy-4.250
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.379 -0.289 0.000
y -0.289 5.758 0.000
z 0.000 0.000 2.344


<r2> (average value of r2) Å2
<r2> 38.071
(<r2>)1/2 6.170