[Tc(NO)Cl(Cp)(PPh3)] - A Technetium(I) Compound with an Unexpected Synthetic Potential

Reactions of the chiral organometallic technetium(I) compound [Tc(NO)Cl(Cp)(PPh3)] (1 a) with phosphines and alkynes give unexpected products such as the dimeric cation [{Tc(NO)(Cp)(PPh3)}(2)Cl](+) (4) or the Fischer-type carbene [Tc(NO)(Cp)(PPh3){C(OR)C2H4PPh3}](2+) (5). Both products could be isolated as PF6- salts and studied by spectroscopic methods and X-ray diffraction. While [Tc(NO)(Cp)(PMe3)(PPh3)](PF6) (2PF(6)) can be obtained from 1 a, PMe3 and Ag(PF6) under ambient conditions, the synthesis of the corresponding bis-triphenylphosphine complex [Tc(NO)(Cp)(PPh3)(2)](PF6) (3PF(6)) requires high temperatures and long reaction times. The products are stable in air.

Automated summary

The reactions of the chiral organometallic technetium(I) compound with phosphines and alkynes resulted in unexpected products, which were isolated as PF6- salts and studied by spectroscopic methods and X-ray diffraction. One of the products can be obtained at room temperature, while the synthesis of the other product requires high temperatures and long reaction times. The products are stable in air.