Structure and dynamics in unsymmetrically substituted five-coordinate iridacyclopentadiene complexes

A five-coordinate metal center in Co(II)-substituted VanX.

In an effort to structurally probe the metal binding site in VanX, electronic absorption, EPR, and extended x-ray absorption fine structure (EXAFS) spectroscopic studies were conducted on Co(II)-substituted VanX. Electronic spectroscopy revealed the presence of Co(II) ligand field transitions that had molar absorptivities of approximately 100 m(-1) cm(-1), which suggests that Co(II) is five-coo...

Dielectric Properties of New Unsymmetrically Substituted Diacetylenes: DNP/R2

für Naturforschung in cooperation with the Max Planck Society for the Advancement of Science under a Creative Commons Attribution 4.0 International License. Dieses Werk wurde im Jahr 2013 vom Verlag Zeitschrift für Naturforschung in Zusammenarbeit mit der Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V. digitalisiert und unter folgender Lizenz veröffentlicht: Creative Commons Namen...

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, ...

Bonding in Low-Coordinate Complexes

Improved Synthetic Route to Unsymmetrically Substituted Phosphinimino-phosphonium Salts. Crystal Structure of Tri-w-butyl- [tris(diethylamino)phosphinimino]phosphonium Chloride

Symmetrically substituted phosphinimino-phos­ phonium salts [R3PNPR3]X have been known for a long time, and their unusual stability towards acids and bases was demonstrated by the work of Ap­ pel and Hauss [1], and Schmidbaur and Jonas [2]. The delocalisation of the positive charge in the PNP skeleton and the shielding by the substituents are the main reason for the use of phosphinimino-phos­ p...