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 HCNH (methyleneazane)

using model chemistry: B3LYP/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 no CS cis 2A'
1 2 yes CS trans 2A'

Conformer 1 (CS cis)

Jump to S1C2
Energy calculated at B3LYP/3-21G
 hartrees
Energy at 0K-93.433595
Energy at 298.15K-93.434897
HF Energy-93.433595
Nuclear repulsion energy28.064087
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 B3LYP/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' 3137 3027 9.54      
2 A' 2947 2843 61.17      
3 A' 1863 1798 13.98      
4 A' 970 936 103.19      
5 A' 906 874 197.38      
6 A" 942 909 8.91      

Unscaled Zero Point Vibrational Energy (zpe) 5382.4 cm-1
Scaled (by 0.9649) Zero Point Vibrational Energy (zpe) 5193.5 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 B3LYP/3-21G
ABC
14.24919 1.27015 1.16620

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.106 0.644 0.000
N2 0.106 -0.582 0.000
H3 -0.661 1.431 0.000
H4 -0.717 -1.217 0.000

Atom - Atom Distances (Å)
  C1 N2 H3 H4
C11.22571.09972.0344
N21.22572.15461.0392
H31.09972.15462.6488
H42.03441.03922.6488

picture of methyleneazane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H4 127.655 H3 C1 N2 135.746
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.056      
2 N -0.528      
3 H 0.187      
4 H 0.285      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -2.345 0.029 0.000 2.345
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -12.140 0.645 0.000
y 0.645 -10.750 0.000
z 0.000 0.000 -12.327
Traceless
 xyz
x -0.601 0.645 0.000
y 0.645 1.484 0.000
z 0.000 0.000 -0.882
Polar
3z2-r2-1.764
x2-y2-1.390
xy0.645
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.544 0.099 0.000
y 0.099 3.723 0.000
z 0.000 0.000 0.938


<r2> (average value of r2) Å2
<r2> 16.816
(<r2>)1/2 4.101

Conformer 2 (CS trans)

Jump to S1C1
Energy calculated at B3LYP/3-21G
 hartrees
Energy at 0K-93.440501
Energy at 298.15K-93.441855
HF Energy-93.440501
Nuclear repulsion energy27.945820
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 B3LYP/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' 3306 3190 0.48      
2 A' 3012 2906 34.07      
3 A' 1772 1710 11.76      
4 A' 1208 1165 18.53      
5 A' 943 910 232.11      
6 A" 1005 969 126.73      

Unscaled Zero Point Vibrational Energy (zpe) 5622.6 cm-1
Scaled (by 0.9649) Zero Point Vibrational Energy (zpe) 5425.2 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 B3LYP/3-21G
ABC
14.02765 1.26834 1.16317

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.002 0.657 0.000
N2 -0.002 -0.585 0.000
H3 0.902 1.280 0.000
H4 -0.881 -1.125 0.000

Atom - Atom Distances (Å)
  C1 N2 H3 H4
C11.24161.09761.9865
N21.24162.07251.0320
H31.09762.07252.9937
H41.98651.03202.9937

picture of methyleneazane state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H4 121.527 H3 C1 N2 124.633
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.013      
2 N -0.518      
3 H 0.203      
4 H 0.302      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.538 -0.076 0.000 0.544
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.118 3.238 0.000
y 3.238 -11.298 0.000
z 0.000 0.000 -12.373
Traceless
 xyz
x 0.718 3.238 0.000
y 3.238 0.447 0.000
z 0.000 0.000 -1.165
Polar
3z2-r2-2.330
x2-y20.180
xy3.238
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.916 0.570 0.000
y 0.570 3.415 0.000
z 0.000 0.000 0.980


<r2> (average value of r2) Å2
<r2> 16.718
(<r2>)1/2 4.089