Four-coordinate complexes of bis(1-diphenylphosphinoindenyl)iron(II)

Four-coordinate, trigonal pyramidal Pt(II) and Pd(II) complexes.

We report herein the characterization of electrophilic, trigonal bipyramidal {[SiP(3)(R)]Pt(L)}(+) cations ([SiP(3)(R)] = [(2-R(2)PC(6)H(4))(3)Si]; R = Ph, (i)Pr) that feature weakly coordinated ligands including CH(2)Cl(2), Et(2)O, toluene, and H(2). A cationic toluene adduct that shows a close platinum aryl C-H σ-contact is perhaps most noteworthy in this context. For the isopropyl-substitute...

14-Electron Four-Coordinate Ru(II) Carbyl Complexes and Their Five-Coordinate Precursors: Synthesis, Double Agostic Interactions, and Reactivity

The structure of five-coordinate Ru(II) complexes RuHCl(CO)(PPr3)2, 1, RuCl2(CO)(PPr3)2, 2, and Ru(Ph)Cl(CO)(PBu2Me)2, 12, are reported. All three of these complexes have square-based pyramid geometry with the strongest σ-donor ligand trans to the vacant site. These 16-electron complexes do not show bona fide agostic interactions. This is attributed to the strong trans influence ligand (H, CO, ...

Cationic and neutral four-coordinate alkylidene complexes of vanadium(IV) containing short V=C bonds.

Bonding in Low-Coordinate Complexes

Electronic communication in oligonuclear ferrocene complexes with anionic four-coordinate boron bridges.

The di- and trinuclear ferrocene species Li[Fc-BPh(2)-Fc] (Li[]) and Li(2)[Fc-BPh(2)-fc-BPh(2)-Fc] (Li(2)[]) have been investigated with regard to their electrochemical properties and the degree of intervalence charge-transfer after partial oxidation. Li[] shows two distinct one-electron redox waves for its chemically equivalent ferrocenyl substituents in the cyclic voltammogram (E(1/2) = -0.38...