SiH
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Species data
Common Formula  SiH 
Stoichiometric Formula  SiH 
Name  Silylidyne 
Mass  28.98475 a.m.u 
Charge  0 
CAS  13774942 
Inchi  InChI=1S/HSi/h1H 
InchiKey  QHGSGZLLHBKSAHUHFFFAOYSAN 
State  Ground State

ISM Abundance
log_{10} Abundance  Reference  Source Name  Source Type  Link 

Polarizability
Evaluation  Definition  Value (Å^{3})  Method  Origin  Reference 

total  3.928  Calculations  Database : NIST COMPUTATIONAL CHEMISTRY COMPARISON AND BENCHMARK DATABASE 
Definition: total Value (Å^{3}): 3.928 Method: Calculations Origin: Database : NIST COMPUTATIONAL CHEMISTRY COMPARISON AND BENCHMARK DATABASE Reference: 
Dipole moment
Evaluation  Value (D)  Method  Origin  Reference 

0.104  Calculations  Bibliography  Woon, D. E. et al. ;2009;Astrophysical Journal Supplement Series ;185,273288 
Value (D):
0.104 Method: Calculations Origin: Bibliography Reference: Woon, D. E. et al. ;2009;Astrophysical Journal Supplement Series ;185,273288 
Enthalpy of formation
Evaluation  T (K)  Value (kJ.mol^{1})  Method  Origin  Reference 

298  368.64 ±8  Measurements  Database : CCCBDB (http://cccbdb.nist.gov/)  
0  366.94 ±8  Measurements  Database : CCCBDB (http://cccbdb.nist.gov/) 
T (K): 298
Value (kJ.mol^{1}) : 368.64 ±8 Method: Measurements Origin: Other database Reference: 
T (K): 0
Value (kJ.mol^{1}) : 366.94 ±8 Method: Measurements Origin: Other database Reference: 
Desorption energy
Evaluation  E_{mean} (K)  E_{min} (K)  E_{max} (K)  Preexponential factor (s^{1})  Order factor  Method  Origin  Reference  Type of surface  Description 

13000 ±3900  0  0  0.00E+0  1  Calculations  Bibliography  Wakelam, V. et al. ;2017;ArXiv eprints;,  H2O  To estimate the unknown binding energies (for most of the radicals for example), we have developed a model founded on the stabilization energy of the complex between the various species and one water molecule. Then, we assume that the binding energy of the species with ASW is proportional to the energy of interaction between this species and one water molecule. To determine the proportionality coefficients, we fit the dependency of the experimental binding energies versus the calculated energies of the complexes for 16 stable molecules. Uncertainties in ED is estimated to be 30%. The preexponential factor is to be computed using the Hasegawa et al. (1992) approximation.  
3150  0  0  0.00E+0  1  Estimation  Database : OSU  H2O  This binding energy was listed in the original OSU gasgrain code from Eric Herbst group in 2006. Energy of Si + H. The preexponential factor is not given. It can be computed using the formula given in Hasegawa et al. (1992). 
E_{mean} (K): 13000 ±3900
E _{min} (K): 0 E _{max} (K): 0 Preexponential factor (s^{1}): 0.00E+0 Method: Calculations Origin: Bibliography Reference: Wakelam, V. et al. ;2017;ArXiv eprints;, Type of surface: H2O Description: To estimate the unknown binding energies (for most of the radicals for example), we have developed a model founded on the stabilization energy of the complex between the various species and one water molecule. Then, we assume that the binding energy of the species with ASW is proportional to the energy of interaction between this species and one water molecule. To determine the proportionality coefficients, we fit the dependency of the experimental binding energies versus the calculated energies of the complexes for 16 stable molecules. Uncertainties in ED is estimated to be 30%. The preexponential factor is to be computed using the Hasegawa et al. (1992) approximation. Evaluation: 
E_{mean} (K): 3150
E _{min} (K): 0 E _{max} (K): 0 Preexponential factor (s^{1}): 0.00E+0 Method: Estimation Origin: Other database Reference: Type of surface: H2O Description: This binding energy was listed in the original OSU gasgrain code from Eric Herbst group in 2006. Energy of Si + H. The preexponential factor is not given. It can be computed using the formula given in Hasegawa et al. (1992). Evaluation: 
Diffusion energy
No data