CAMPOS , Jesús

The first example of a Frustrated Lewis Pair (FLP) solely constructed around transition metal centers is described in this work. We have focused on the established capacity of Au(I) and Pt(0) complexes to act as Lewis acidic and basic frag-ments, respectively, while employing sufficiently bulky PtBu3 and terphenyl phosphine ligands. This avoids...

La Química Organometálica se ha desarrollado de forma extraordinaria desde sus comienzos a mediados del siglo XX, como se manifiesta en la enorme cantidad de complejos de muy diversa naturaleza que se han sintetizado hasta la fecha, los cuales exhiben una reactividad química sin precedentes. Estos compuestos se han utilizado en numerosos...

The chemistry of late transition metal alkylidenes [M=CR2], where R is H a hydrocarbyl group, have attracted widespread attention although mainly with reference to complexes of metals in low oxidation state. We focus in this paper on reactions based on electrophilic attacks by Ph3C+ that allow either isolation of stable cationic Ir(III)...

Cyclometalated chloride complexes of rhodium and iridium based on (5-C5Me5)M(III) fragments that result from the metalation of the xylyl substituent of a coordinated PR2(Xyl) phosphine (Xyl=2,6-Me2C6H3) have been prepared by reaction of the appropriate metal precursor with the corresponding phosphine. For iridium, four complexes derived from...

LiCH3 and LiCH2CH3 react with the complex [Mo2(H)2(μ-AdDipp2)2(thf)2] (1⋅thf) with coordination of two molecules of LiCH2R (R=H, CH3) and formation of complexes [Mo2{μ-HLi(thf)CH2R}2(AdDipp2)2], 5⋅LiCH3 and 5⋅LiCH2CH3, respectively (AdDipp2=HC(NDipp)2; Dipp=2,6-iPr2C6H3; thf=C4H8O). Due to steric hindrance, only one molecule of LiC6H5 adds to...

Metal-only Lewis pairs made of Pt(0)/Ag(I) combinations have been previously reported, but their cooperative reactivity remains unexplored. Here we demonstrate that these systems are capable of synergistically activating a wide variety of X–H (X = H, C, O, N) bonds, including those in dihydrogen, alkynes, water and ammonia.

We recently disclosed a dehydrogenative double C−H bond activation reaction in the unusual pincer-type rhodium-germyl complex [(ArMes)2ClGeRh] (ArMes=C6H3-2,6-(C6H2-2,4,6-Me3)2). Herein we investigate the catalytic applications of this Rh/Ge system in several transformations, namely trans-semihydrogenation of internal alkynes,...

Organometallic chemistry can be considered as a wide area of knowledge that combines concepts of classic organic chemistry, that is, based essentially on carbon, with molecular inorganic chemistry, especially with coordination compounds. Transition-metal methyl complexes probably represent the simplest and most fundamental way to view how these...

Transition metal tetrylene complexes offer great opportunities for molecular cooperation due to the ambiphilic character of the group 14 element. Here we focus on the coordination of germylene [(ArMes2)2Ge :] (ArMes=C6H3-2,6-(C6H2-2,4,6-Me3)2) to [RhCl(COD)]2 (COD=1,5-cyclooctadiene), which yields a neutral germyl complex in which the rhodium...

There is growing interest in the design of bimetallic cooperative complexes, which have emerged due to their potential for bond activation and catalysis, a feature widely exploited by nature in metalloenzymes, and also in the field of heterogeneous catalysis. Herein, we discuss the widespread opportunities derived from combining two metals in...

Heavier group 14 element cations exhibit a remarkable reactivity that has typically hampered their isolation. For the few available examples, the role of π-arene interactions is crucial to provide kinetic stabilization, but dynamic and structural information on those contacts is yet limited. In this study we have accessed the metalogermylenium...