Producción Científica Profesorado

Study of the Coordination Modes of Hybrid NNCp Cyclopentadienyl/Scorpionate Ligands in Ir Compounds



Mendoza Espinosa, Daniel

2019

Study of the Coordination Modes of Hybrid NNCp Cyclopentadienyl/Scorpionate Ligands in Ir CompoundsArián E. Roa, Verónica Salazar, Daniel Mendoza-Espinosa, Margarita Paneque, Antonio Rodríguez-Diéguez, Ana M. Rodríguez, Juan Tejeda, José A. Castro-Osma, Antonio Otero, and Agustín Lara-SánchezInorg. Chem., 2019, 58 (1), pp 900?908DOI: 10.1021/acs.inorgchem.8b03030


Abstract


A new coordination mode for the hybrid scorpionate/cyclopentadienyl ligand bpzcp, [bpzcp = 2,2-bis(3,5-dimethylpyrazol-1-yl)-1,1-diphenylethylcyclopentadienyl] is observed in iridium complexes. The reaction of the lithium precursor, [Li(bpzcp)(THF)], with a range of [IrCl(diene)]2 compounds leads to an unprecedented binding mode of the hybrid scorpionate/cyclopentadienyl ligand as ?5-Cp-coordinated and the formation of Ir(I) derivatives [Ir(?5-Cp-bpzcp)(?4-cod)] (1), [Ir(?5-Cp-bpzcp){?4-CH2?C(Me)C(Me)?CH2}] (2), [Ir(?5-Cp-bpzcp)(?2-coe)2] (3), and [Ir(?5-Cp-bpzcp)(?2-CH2?CH2)2] (4). The Ir(I) complex 4 reacts with CO or bromine to afford the compound [Ir(?5-Cp-bpzcp)(CO)2] (5) and the 18e? Ir(III) complex [Ir(?-N-?5-Cp-bpzcpBr2)Br2] (6), respectively. Reaction of the iridium compounds (2?4) with CuI or [PdCl2(CH3CN)2] yields the heterobimetallic iridium?copper or iridium?palladium complexes [Ir(?5-Cp-bpzcp){?4-CH2?C(Me)C(Me)?CH2}(?-bpzcp){CuI(?2-NN-bpzcp)}] (7), [Ir(?5-Cp-bpzcp)(?2-coe)2}(?-bpzcp){CuI(?2-NN-bpzcp)}] (8), [Ir(?5-Cp-bpzcp)(?2-CH2?CH2)2}(?-bpzcp){CuI(?2-NN-bpzcp)}] (9), [Ir(?5-Cp-bpzcp)(coe)2}(?-bpzcp){PdCl2(?2-NN-bpzcp)}] (10), and [Ir(?5-Cp-bpzcp)(?2-CH2?CH2)2(?-bpzcp){PdCl2(?2-NN-bpzcp)}] (11). All products were characterized by spectroscopic methods and the X-ray crystal structures of 1, 2, 3, 4, and 6 were also established.



Producto de Investigación




Artículos relacionados

Preparation of 3-hydroxyoxindoles with dimethyldioxirane and their use for the synthesis of natural ...

Unimolecular rearrangements of ketene-O,O-acetals and fragmentations occurring in the gas phase

Configuration, stereodynamics and crystal structure of 3-substituted-2-oxofuro[2,3-b]indoles

Conformationalstudies of N-carbomethoxy-2-alkoxyindolenines by dynamic NMR, crystallography, and mol...

Regioselective Synthesis of 3-Indolyl(alkoxy)acetates

Cascade [1,3]-Sigmatropic Rearrangements of Ketene O,O-Acetals: Kinetic and DFT Level Mechanistic St...

Transesterifications mediated by t-BuNH2

Synthesis of ?4:?2-Exocyclic-Diene Iridium(I) Complexes Derived from 1,3-Oxazolidin-2-ones and Their...

Reactivity of TpMe2Ir(C2H4)(DMAD) with carboxylic acids. A DFT study on geometrical isomers and stru...

Synthesis of Bromoindole Alkaloids from Laurencia brongniartii