Synthesis and Characterization of a New (Nitro) Pyridyl Cobalt Tetraphenyl Porphyrin Derivative, (Nitro) Pyridyl Cobalt Tetra (Orthopivalamido) Phenyl Porphyrin.
It recent research, (py)Co(III)TTP(N[O.sub.2]) derivatives have
been synthesized for possible use as an industrial oxo-transfer
catalyst. One problem that arose during analysis was that this compound
and its derivatives undergo a phenomenon that appears to be a
disproportionation reaction. The purpose of this research was to find a
way to stop this disproportionation reaction from occurring without
altering the catalytic properties of the compound and its derivatives.
To do this tetraphenyl ortho-pivalamido phenyl porphyrin, or
"picket fence porphyrin," was used in the synthesis of the
pyridyl derivatives. It was found that the picket fence limited
reactivity, as expected, without changing the desired catalytic
properties. After using Nuclear Magnetic Resonance (NMR), ultraviolet
visibility analysis, and infrared spectroscopy analysis, it was
discovered that the solution used in filtering the compound contained
amylene and was impure. It was concluded that disproportionation
reactions do not occur in the normal pyridyl derivatives under regular
circumstances and that the reaction that was appearing on NMR and
ultraviolet visibility analysis was actually an oxidation reaction with
amylene, an alkane. Further research could show that this is a
beneficial property of the catalyst.
Nicholas William De Nitto
South Carolina Governor's School for Science and Mathematics