Producción Científica Profesorado

Reactivity of 2?mercaptopyridines with Iridium(I)?Tris(pyrazolyl) borate complexes



Rojas Lima, Susana

2021

Manuel A. Gomez?Bonilla, Verónica Salazar?Pereda, Daniel Mendoza?Espinosa, Simplicio Gonzalez?Montiel, Aracely Castañeda?Ovando, Susana Rojas?Lima, Cesar I. Sandoval?Chavez, Jorge A. Lopez?Jímenez. Reactivity of 2?mercaptopyridines with Iridium(I)?Tris(pyrazolyl) borate complexes. European Journal of Inorganic Chemistry, 2021, 13, 1244-1250. https://doi.org/10.1002/ejic.202001153


Abstract


Reaction of of the Ir(I) complex [TpMe2Ir?(C2H4)2] (1) with a variety of mercaptopyridines produces in good yields the Ir(III)?metallacycles 2?4 with the general formula [TpMe2Ir(C2H5)(k2?(N,S)?mercaptopyridine)]. Complexes 2?4 are proposed to take place by the initial formation of the 16 electron intermediate [TpMe2Ir(CH=CH2)(C2H5)] which then coordinates the nitrogen atom of the mercaptopyridine and promotes the deprotonation of the SH group via the elimination of an ethylene molecule. Heating of complex [TpMe2Ir(?4?CH2=C(Me)C(Me)=CH2)]] (5) at 100?C with the substituted mercaptopyridines results in the formation of the Ir(III) complexes 6?8 with the general formula [TpMe2Ir(C6H5)(?2?(N,S)?mercaptopyridine)]. Generation of complexes 6?8 is proposed to take place by the initial formation of the [TpMe2Ir(C6H5)2N2] complex which after releasing nitrogen coordinates the mercaptopyridine in a ?1?fashion and favour the SH moiety deprotonation with the release of a benzene molecule. All complexes have been fully characterized by NMR spectroscopy, FT?IR, elemental analysis and in the case of 2, 4, and 8 by X?ray crystallography. Details of the reaction conditions, characterization and isolation of the products will be discussed.



Producto de Investigación




Artículos relacionados

Highly diastereoselective alkylation, acylation and aldol condensation of cis- and trans-(N-acyloyl)...

Preparation of Seven- and Eight-Membered Boron Heterocycles from Different Salen Ligands and Arylbor...

Synthesis of nitrogen-, oxygen- and sulphur-containing tripodal ligands with a trimethylbenzene core...

Addition reaction of benzylbenzylidenenamine to lithium enolates of1,3-dioxolan-4-one: synthesis of ...

New boronates prepared from 2,4-pentanedione derived ligands of the NO2 and N2O2 type comparison to...

Stereoselective addition of allylmagnesium chloride to the CN bond of [4.3.0] boron heterobicycles

Synthesis, crystal structures, and quadratic nonlinear optical properties in a series of pushpull bo...

Addition reaction of benzylbenzylidenenamine to lithium enolates of 1,3-dioxolan-4-one: synthesis of...

Stereoselective addition of allylmagnesium chloride to the CN bond of [4.3.0] boron heterobicycles

Synthesis and Structures of some Lithium and Sodium (Aminoalcoholato)hydrido Aluminates