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 ZnCH2 (Zinc methylene)

using model chemistry: ROHF/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 3B1
2 2 yes CS 1A'

State 1 (3B1) , Conformer 1 (C2V)

Jump to S1C2 S2C1 S2C2
Energy calculated at ROHF/STO-3G
 hartrees
Energy at 0K-1795.970656
Energy at 298.15K-1795.972301
Nuclear repulsion energy75.213359
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 ROHF/STO-3G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3601 3601 33.49      
2 A1 1733 1733 2.81      
3 A1 891 891 0.99      
4 B1 989 989 35.39      
5 B2 3736 3736 1.27      
6 B2 698 698 5.17      

Unscaled Zero Point Vibrational Energy (zpe) 5823.9 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 5823.9 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 ROHF/STO-3G
ABC
10.61790 0.45308 0.43453

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Zn1 0.000 0.000 0.389
C2 0.000 0.000 -1.305
H3 0.000 0.888 -1.921
H4 0.000 -0.888 -1.921

Atom - Atom Distances (Å)
  Zn1 C2 H3 H4
Zn11.69462.47502.4750
C21.69461.08021.0802
H32.47501.08021.7750
H42.47501.08021.7750

picture of Zinc methylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Zn1 C2 H3 124.751 Zn1 C2 H4 124.751
H3 C2 H4 110.498
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at ROHF/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Zn 0.368      
2 C -0.463      
3 H 0.048      
4 H 0.048      


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 -0.183 0.183
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.025 0.000 0.000
y 0.000 -19.285 0.000
z 0.000 0.000 -24.746
Traceless
 xyz
x -1.010 0.000 0.000
y 0.000 4.601 0.000
z 0.000 0.000 -3.591
Polar
3z2-r2-7.183
x2-y2-3.740
xy0.000
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> 37.687
(<r2>)1/2 6.139

State 1 () , Conformer 2 ()

Jump to S1C1 S2C1 S2C2
Energy calculated at ROHF/STO-3G
 hartrees
Energy at 0K-1795.970656
Energy at 298.15K-1795.972301
Nuclear repulsion energy75.213359
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 ROHF/STO-3G
Rotational Constants (cm-1) from geometry optimized at ROHF/STO-3G
ABC
10.61790 0.45308 0.43453

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

Point Group is C2v

Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

State 2 (1A1) , Conformer 1 (C2V)

Jump to S1C1 S1C2 S2C2
Energy calculated at ROHF/STO-3G
 hartrees
Energy at 0K-1795.970656
Energy at 298.15K-1795.972301
Nuclear repulsion energy75.213359
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 ROHF/STO-3G
Rotational Constants (cm-1) from geometry optimized at ROHF/STO-3G
ABC
10.61790 0.45308 0.43453

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

Point Group is C2v

Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

State 2 (1A') , Conformer 2 (CS)

Jump to S1C1 S1C2 S2C1
Energy calculated at ROHF/STO-3G
 hartrees
Energy at 0K-1795.754572
Energy at 298.15K-1795.756166
Nuclear repulsion energy75.899018
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 ROHF/STO-3G
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' 3588 3588 38.49      
2 A' 1720 1720 5.50      
3 A' 1013 1013 34.93      
4 A' 926 926 5.29      
5 A" 3720 3720 0.07      
6 A" 582 582 14.41      

Unscaled Zero Point Vibrational Energy (zpe) 5773.8 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 5773.8 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 ROHF/STO-3G
ABC
10.70280 0.46186 0.44275

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Zn1 0.000 0.386 0.000
C2 0.000 -1.290 0.000
H3 0.000 -1.914 0.884
H4 0.000 -1.914 -0.884

Atom - Atom Distances (Å)
  Zn1 C2 H3 H4
Zn11.67562.46402.4640
C21.67561.08231.0823
H32.46401.08231.7680
H42.46401.08231.7680

picture of Zinc methylene state 2 conformation 2
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at ROHF/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Zn 0.317      
2 C -0.422      
3 H 0.053      
4 H 0.053      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 -0.589 0.000 0.589
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.117 0.000 0.000
y 0.000 -25.018 0.001
z 0.000 0.001 -19.276
Traceless
 xyz
x -0.970 0.000 0.000
y 0.000 -3.822 0.001
z 0.000 0.001 4.792
Polar
3z2-r29.584
x2-y21.901
xy0.000
xz0.000
yz0.001


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> 37.372
(<r2>)1/2 6.113