Rhodium and Iridium Complexes Bearing “Capping Arene” Ligands: Synthesis and Characterization was written by Gu, Shunyan;Musgrave, Charles B.;Gehman, Zoe M.;Zhang, Ke;Dickie, Diane A.;Goddard, William A.;Gunnoe, T. Brent. And the article was included in Organometallics in 2021.Safety of Chlorobis(ethylene)iridium(I) dimer This article mentions the following:
A series of olefin-coordinated RhI and IrI complexes bearing “capping arene” ligands (5–XFP and 6–XFP) of the general formulas (FP)M(olefin)X, [(FP)M(olefin)2][M(olefin)2X2], and [(FP)M(olefin)2]BF4 (FP = “capping arene” ligands, X = halide or pseudohalide, olefin = ethylene, cyclooctene, (olefin)2 = (C2H4)2 or cyclooctadiene) were synthesized and characterized. Single-crystal X-ray diffraction studies revealed structural differences that are a function of the identity of the capping arene ligand and the metal. For 5–XFP ligands (5–XFP = 1,2-bis(N-7-azaindolyl)-benzene and derivatives with substituents on the arene moiety), the coordination to both Rh and Ir gives rise to complexes that are best described as 16-electron and square planar. For 6–XFP ligands (6–XFP = 8,8′-(1,2-phenylene)diquinoline and derivatives with substituents on the arene moiety), the structures of Rh and Ir complexes are better considered as 18-electron and trigonal bipyramidal due to an 畏2-C,C interaction between the metal center and the arene group of the capping arene ligand. Variable-temperature 1H NMR spectroscopy studies of ethylene rotation demonstrated that the Ir complexes possess higher activation barriers to rotation in comparison to Rh complexes and the 6–XFP complexes tend to give ethylene higher rotational barriers in comparison to 5–XFP complexes for complexes of the type (FP)Rh(畏2-C2H4)Cl. DFT calculations are consistent with enhanced Rh to ethylene 蟺-back-donation for Rh complexes ligated by the 6–XFP ligands in comparison to the 5–XFP ligands. In the experiment, the researchers used many compounds, for example, Chlorobis(ethylene)iridium(I) dimer (cas: 39722-81-1Safety of Chlorobis(ethylene)iridium(I) dimer).
Chlorobis(ethylene)iridium(I) dimer (cas: 39722-81-1) belongs to organic chlorides. Organochlorines are organic compounds having multiple chlorine atoms. They were the first synthetic pesticides that were used in agriculture. They are resistant to most microbial and chemical degradations. Alkanes and aryl alkanes may be chlorinated under free radical conditions, with UV light. However, the extent of chlorination is difficult to control.Safety of Chlorobis(ethylene)iridium(I) dimer
Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics