return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
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All results from a given calculation for CaH2 (Calcium Hydride)

using model chemistry: CCD/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D*H 1Σg
Energy calculated at CCD/6-311G*
 hartrees
Energy at 0K-678.084868
Energy at 298.15K-678.085731
HF Energy-677.856988
Nuclear repulsion energy10.302632
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 CCD/6-311G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Σg 1288 1230 0.00      
2 Σu 1230 1174 682.72      
3 Πu 194 185 748.40      
3 Πu 194 185 748.40      

Unscaled Zero Point Vibrational Energy (zpe) 1452.9 cm-1
Scaled (by 0.9551) Zero Point Vibrational Energy (zpe) 1387.6 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 CCD/6-311G*
B
1.93270

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/6-311G*

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Ca1 0.000 0.000 0.000
H2 0.000 0.000 2.080
H3 0.000 0.000 -2.080

Atom - Atom Distances (Å)
  Ca1 H2 H3
Ca12.08022.0802
H22.08024.1604
H32.08024.1604

picture of Calcium Hydride state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 Ca1 H3 180.000
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability