Photochemical Reactions of Fluorinated Pyridines at Half-Sandwich Rhodium Complexes: Competing Pathways of Reaction.

ABSTRACT: Irradiation of CpRh(PMe₃)(C₂H₄) (1; Cp = η⁵-C₅H₅) in the presence of pentafluoropyridine in hexane solution at low temperature yields an isolable η²-C,C-coordinated pentafluoropyridine complex, CpRh(PMe₃)(η²-C,C-C₅NF₄) (2). The molecular structure of 2 was determined by single-crystal X-ray diffraction, showing coordination by C3-C4, unlike previous structures of pentafluoropyridine complexes that show N-coordination. Corresponding experiments with 2,3,5,6-tetrafluoropyridine yield the C-H oxidative addition product CpRh(PMe₃)(C₅NF₄)H (3). In contrast, UV irradiation of 1 in hexane,

SUBMITTER: Procacci B 

PROVIDER: S-EPMC3929166 | biostudies-literature | 2014 Jan

REPOSITORIES: biostudies-literature