National Institute of Standards and Technology
Computational Chemistry Comparison and Benchmark DataBase
Release 17bSeptember 2015
NIST Standard Reference Database 101
IIExperimental data
IIICalculated data
IVData comparisons
VCost comparisons
VIInput and output files
VIITutorials and Units
VIIILinks to other sites
XOlder CCCBDB versions
XIII Vibrations
XIVReaction data
XVEntropy data
XVIBibliographic data
XVIIIon data
XVIIIBad calculations
XIXIndex of properties
XXH-bond dimers

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II.A.1. (XV.A.)

Listing of experimental data for GeH2 (germylene)

State Conformation
1A1 C2v
Enthalpy of formation (Hfg), Entropy, Integrated heat capacity (0 K to 298.15 K) (HH), Heat Capacity (Cp)
Property Value Uncertainty units Reference Comment
Information can also be found for this species in the NIST Chemistry Webbook
Vibrational levels (cm-1) vibrations
Mode Number Symmetry Frequency (cm-1) Frequency Reference Intensity (km mol-1) Int. unc. Intensity Reference Comment
1 A1 1856 webbook      
2 A1 916 webbook      
3 B2 1863 webbook      

vibrational zero-point energy: 2317.3 cm-1
Calculated vibrational frequencies for GeH2 (germylene).
Rotational Constants (cm-1) rotational constants
See section I.F.4 to change rotational constant units
A B C reference comment
7.02000 6.53220 3.33700 2000Smi/Clo:9567 72Ge

Calculated rotational constants for GeH2 (germylene).

Product of moments of inertia moments of inertia
31.30666amu3Å6   1.43352335640289E-118gm3 cm6
Geometric Data
picture of germylene

Point Group C2v

Internal coordinates
distances (r) in Å, angles (a) in degrees, dihedrals (d) in degrees

Description Value unc. Connectivity Reference Comment
Atom 1 Atom 2 Atom 3 Atom 4
eHGe 1.5883 0.0009 1 2 2000Smi/Clo:9567
aHGeH 91.22 0.04 2 1 3 2000Smi/Clo:9567


Atom x (Å) y (Å) z (Å)
Ge1 0.0000 0.0000 0.0654
H2 0.0000 1.1350 -1.0457
H3 0.0000 -1.1350 -1.0457

Atom - Atom Distances bond lengths
Distances in Å

  Ge1 H2 H3
Ge1   1.58831.5883
H2 1.5883   2.2700
H3 1.58832.2700  

Calculated geometries for GeH2 (germylene).

Experimental Bond Angles (degrees) from cartesians bond angles

atom1 atom2 atom3 angle
H2 Ge1 H3 91.220

Bond descriptions

Examples: C-C single bond, C=C, double bond, C#C triple bond, C:C aromatic bond
Bond Type Count
H-Ge 2


Atom 1 Atom 2
Ge1 H2
Ge1 H3
Electronic energy levels (cm-1)
Energy (cm-1) Degeneracy reference description

Electron Affinity (eV)

Electron Affinity unc. reference
1.097 0.003 webbook
Dipole, Quadrupole and Polarizability
Electric dipole moment dipole
Calculated electric dipole moments for GeH2 (germylene).
Electric quadrupole moment quadrupole
Calculated electric quadrupole moments for GeH2 (germylene).

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