A catalyst don`t appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. Reference of 2081-44-9Reference of 2081-44-9, , Name is Tetrahydro-2H-pyran-4-ol, molecular formula is C5H10O2. In a patent, introducing its new discovery.
Relative rate coefficients for the gas-phase reaction of chlorine atoms (Cl) with tetrahydropyran (THP) have been determined by Fourier transform infrared (FTIR) spectroscopy and gas chromatography coupled to a mass spectrometer (GC-MS). The averaged rate coefficient is (2.21 ± 0.32) × 10-10 cm3 molecule-1 s-1 (with 2sigma uncertainty) and was obtained using different reference compounds, Cl precursors, and bath gases at 740 ± 5 Torr and 298 ± 2 K. Products of the title reaction were identified and quantified by solid-phase microextraction (SPME) coupled to a GC-MS. Additionally, the first step of the reaction was theoretically studied by ab initio calculations. Reaction mechanism seems to proceed mainly by the H-abstraction from alpha and gamma positions. THP tropospheric lifetime is estimated from the rate coefficient reported here. The atmospheric implications of the Cl reactivity are also discussed.
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Reference：
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics