In organic chemistry, atoms other than carbon and hydrogen are generally referred to as heteroatoms. The most common heteroatoms are nitrogen, oxygen and sulfur. Now I present to you an article called The effect of fluorine, trifluoromethyl and related substitution on the donor properties of triarylphosphines towards [Fe(CO)4], published in 1998-03-31, which mentions a compound: 175136-62-6, mainly applied to iron carbonyl triarylphosphine preparation IR; substituent effect triarylphosphine substitution styreneiron tetracarbonyl; arylphosphine substitution styreneiron tetracarbonyl substituent effect; crystal structure triarylphosphine iron tetracarbonyl complex; fluorinated triarylphosphine iron carbonyl preparation IR, Quality Control of Tris(3,5-bis(trifluoromethyl)phenyl)phosphine.
IR and crystallog. studies of [(CO)4Fe(PAr3)] complexes were used to quantify the decreasing σ-donor/π-acceptor character of the ligand with increasing fluoro or trifluoromethyl substitution of the aryl ring. The poor coordinating ability of o-CF3 substituted phosphines may be mimicked by o-tBu substitution in the alkyl series.
The article 《The effect of fluorine, trifluoromethyl and related substitution on the donor properties of triarylphosphines towards [Fe(CO)4]》 also mentions many details about this compound(175136-62-6)Quality Control of Tris(3,5-bis(trifluoromethyl)phenyl)phosphine, you can pay attention to it, because details determine success or failure
Reference:
Piperidine – Wikipedia,
Piperidine | C5H11N – PubChem