# Synthesis and Application of PN-Supported Mn(I) Carbonyl Alkyl Complexes

## TL;DR

Scientists created and tested new manganese complexes for use in chemical reactions, finding some to be effective catalysts.

## Contribution

New Mn(I) carbonyl alkyl complexes with PN ligands were synthesized and shown to catalyze specific reactions efficiently.

## Key findings

- fac-[Mn(PCyNMe)(CO)3Me] is effective for phenylacetylene dimerization.
- fac-[Mn(PPhNMe)(CO)3Me] catalyzes the hydroboration of 4-chlorostyrene efficiently.

## Abstract

This work comprises
the synthesis and characterization of aminophosphine
(PN)-derived Mn(I) carbonyl complexes and the preliminary investigation
of their alkylated congeners for catalytic applications. The complexes fac-[Mn(PN)(CO)3Br] are obtained from the reaction
of Mn(CO)5Br with the bidentate ligand PN = R2N(CH2)2PR′2, where R = Me,
Et, and pyrrolidine and R′ = Ph, iPr, and
Cy. Treatment of fac-[Mn(PN)(CO)3Br] with
AgOTf yields fac-[Mn(PN)(CO)3OTf]. Upon
reaction of fac-[Mn(PN)(CO)3OTf] with
MeLi (R′ = alkyl) or MeMgCl (R′ = aryl), fac-[Mn(PN)(CO)3Me] is formed. fac-[Mn(PCyNMe)(CO)3Me] and fac-[Mn(PPhNMe)(CO)3Me] are identified
as the best catalysts for the dimerization of phenylacetylene and
the hydroboration of 4-chlorostyrene, respectively.