Recent Progress of Discrete Metallacycles Based on the Half-Sandwich Ir/Rh/Ru Motifs

Abstract

Discrete metallacycle complexes have attracted considerable attention because of their widely used in host-guest chemistry, gas adsorption, molecular recognition and catalysis. Thus exploring new framework complexes, studying their physical and chemical properties and applications have become one of the most active and exciting areas of inorganic chemistry, organic chemistry and supramolecular chemistry. Half-sandwich organometallic units based on ruthenium, iridium and rhodium are often utilized to prepare diverse metallacylce complexes due to the following advantages: the solubility of these metal complexes can be enhanced, the hemisphere of the metal center is perfectly shielded, minimizing the complexity of reactions, and the products with different structures are easily synthesized. In this paper, the synthesis and application of discrete type metal framework complexes with half-sandwich structures of ruthenium, iridium and rhodium are reviewed.

Syntheses and Structural Studies of a Series of Ti4(embonate)6-based Complexes

“…金属有机笼(Metal-Organic Cages, MOCs)是由配体 和金属通过配位自组装合成的、具有特殊空腔结构的晶 态材料 [1][2][3][4][5] . 由于它在分子识别、仿生催化和药物传输等 方面具有诱人的应用前景, 最近十几年, 引起了科学家 们广泛地关注 [6][7][8][9][10][11][12] .…”

A Straightforward Strategy for Constructing Zirconium Metallocavitands

“…In particular, the organometallic half-sandwich MCs with distinct structural characteristics, in which metal centers were blocked by cyclopentadienyl (Cp), pentamethylcyclo-pentadienyl (Cp*), or arene (C n H m ) ligands, − are amenable to form discrete structures. To date, several organometallic half-sandwich MCs, assembled from Ru II –C n H m , Rh III –Cp*, Ir III –Cp*, Zr IV– Cp, and Ta V –Cp* half-sandwich complexes, have been reported. − However, such MCs require a tightly designed ligand with high compatibility. Therefore, it is highly desirable to construct stable organometallic half-sandwich MCs from simple and readily accessible ligands for their practical applications.…”