Kinetic and high-pressure mechanistic investigation of the aqua substitution in the trans-aquaoxotetracyano complexes of re(v) and tc(v): some implications for nuclear medicine

Light-Driven Ring Slippage in [Re(η7-C7H7)(η5-C7H9)]+ and the Inertness of Its Technetium Homologue

Here, we present the light-driven reactions of [Re(η7-C7H7)(η5-C7H9)]+ (1+) with nitriles, phosphines, and isocyanides, which are added to 1+ via a ring slippage of the tropylium cation from η7 to η3, forming [Re(η3-C7H7)(η5-C7H9)(L)2]+ (L= acetonitrile 2+; 2-phenylacetonitrile 3+; 1,3,5-triaza-5-phosphoadamantane (PTA) 4+; tert-butyl isocyanide 6+; benzyl isocyanide 7+) and [Re(η3-C7H7)(η5-C7H9)(L)]+ with L = (ethane-1,2-diyl)bis(diphenylphosphane) (dppe) 5+. To compare the reactivities of rhenium and technetium, we also investigated the synthesis of [99Tc(η6-C10H8)2]+, its substitution of naphthalene with cyclohepta-1,3,5-triene to obtain [99Tc(η7-C7H7)(η5-C7H9)]+, and its reactivity (or lack thereof) with light.

Ambient and high-pressure kinetic investigation of methanol substitution in fac-[Re(Trop)(CO)3(MeOH)] by different monodentate nucleophiles

First report of high-pressure methanol substitution by entering monodentate L forms fac-[Re(CO)₃(Trop)(L)] {ΔV^≠_(kL) = +9 – +14 cm⁻³ mol⁻¹}, indicating dissociative/dissociative interchange activation.

Crystal structure of fac-(acetylacetonato-κ2O,O′)tricarbonyl(benzyldiphenylphosphine-κP)rhenium(I), C27H24O5PRe

C27H24O5PRe, triclinic, P1̄ (no. 2), a = 9.0305(17) Å, b = 12.084(2) Å, c = 12.403(2) Å, α = 89.688(6)°, β = 70.083(6)°, γ = 76.315(6)°, V = 1232.2(4) Å3, Z = 2, Rgt(F) = 0.0180, wRref(F2) = 0.0432, T = 100(2) K.