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Species data
Common Formula HC2O
Stoichiometric Formula HC2O
Name Ethynyloxy radical
Mass   41.00274 a.m.u
Charge   0
CAS   51095-15-9
Inchi InChI=1S/C2HO/c1-2-3/h1H
State Ground State
Electronic state

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ISM Abundance  
log10 Abundance Reference Source Name Source Type Link
Definition: total
Value 3): 4.2
Method: Calculation
Origin: Bibliography
Reference: Loison, J.-C. et al. ;2017;\mnras;470, 4075-4088
Dipole moment  
Value (D): 1.8
Method: Calculations
Origin: Private communication
Reference: M06-2X/cc-aug-VTZ calculations (JC Loison)
Enthalpy of formation  
T (K): 298
Value (kJ.mol-1) : 175
Method: Measurements
Origin: Bibliography
Reference: Baulch, D. L. et al. ;2005;J. Phys. Chem. Ref. Data;34, 757-1397
Desorption energy  
Emean (K): 2400
E min (K): 0
E max (K): 0
Pre-exponential factor (s-1): 0.00E+0
Method: Estimation
Origin: Other database
Type of surface: H2O
Description: This binding energy was listed in the original OSU gas-grain code from Eric Herbst group in 2006. Energy of C2O + H. The pre-exponential factor is not given. It can be computed using the formula given in Hasegawa et al. (1992).
Diffusion energy  
No data