Synthesis of Tellurido‐Bridged IrPt₂, IrPd₂, and IrPtPd Clusters by Inserting Zero‐Valent Pt and Pd Centers into TeC Bonds

Abstract

Soluble transition-metal sulfido clusters have been investigated extensively because of their relevance to biological and industrial catalysts. In contrast, the chemistry of the analogues of tellurium, the heavier congener of sulfur, has been less-well developed.

A series of multinuclear homo- and heterometallic complexes with bridging tellurolato ligands derived from [Cp∗Ir(CO)(TeTol)2] (Cp∗= η5-C5Me5, Tol =p-tolyl)

“…In the previous paper [3], we have reported the formation of the triangular clusters with two capping tellurido ligands [Cp * Ir-(CO)(l 3 Now we have found that when 1 is allowed to react with an equimolar amount of Pd(II) complex [PdCl 2 (cod)] (cod = 1,5-cyclooctadiene) at room temperature, the tellurolato-bridged heterobimetallic complex [Cp * Ir(CO)(l-TeTol) 2 PdCl 2 ] (2) is obtained in moderate yield (Eq. (1)).…”

“…Solvents were dried by common methods and distilled under N 2 before use. Complexes 1 [3], [MCl 2 (cod)] (M = Pd [8], Pt [9]), [(Cp * MCl) 2 (l-Cl) 2 ] (M = Ir, Rh) [10], [(Cp * Ru) 4 (l 3 -Cl) 4 ] [11], and [RuH(cod)(MeCN) 3 ][BPh 4 ] [12] were prepared according to the literature methods, while KPF 6 was obtained commercially and used as received.…”

“…Thus, with respect to the multinuclear complexes with bridging tellurolato ligands, for example, fully characterized compounds are relatively limited and those with the heterometallic cores are rare [2]. In this paper, we wish to describe the synthesis and structures of some new homometallic and heterobimetallic complexes with bridging tellurolato ligands derived from the bis(tellurolato) complex [Cp * Ir(CO)(TeTol) 2 ] (1; Cp * = g 5 -C 5 Me 5 , Tol = p-tolyl) prepared previously in this laboratory [3].…”

Reactivity of 4‐Pyridyltellurolate with Pd(II)/Pt(II) Complexes

“…Appropriate restraints and / or constraints were used to keep the bond distances, angles, and thermal ellipsoids meaningful. Usually in tellurido‐bridged cluster complexes, the Pd−Te bond distances observed in the range of 2.60‐2.70 Å . The shortest metal…metal distances found with Te1…Te3 (3.32 Å) and Pd3…Pd4 (3.21 Å) separation.…”

Emerging trends in organotellurolate chemistry derived from platinoids

“…{PtTol(PPh 3 )}](Fig. 16), which was formed by the facile inversion of the Pd(0) center in to a Te-Tol bond in the complex [CpIr(CO)(m-Te)(m-TeTol){PtTol(PPh 3 )}] 126,157. Similarly, [Pt(TeR) 2 (dppe)] (R ¼ Ph, Fc) upon reaction with a rhenium carbonyl cluster yielded heterometallic tellurolato bridged complexes [(dppe)Pt(m-TeR) 2 ReCl(CO) 3 ] (R ¼ Ph, Fc) 158,159.…”