Synthesis and Reactivity of [Fe3(CO)9Te]2-

Electron‐Sponge Behavior, Reactivity and Electronic Structures of Cobalt‐Centered Cubic Co9Te6(CO)8 Clusters

“…As by-product [Cp* 2 Nb-(CO) 2 ][PPh 3 CoCl 3 ] was obtained as green needles by direct recrystallization of the reaction mixture. [14] The formation of 4 is unprecedented in that a pseudoprotonation [15] of one of the nucleophilic µ 5 -Te bridges of the Co 11 Te 7 skeleton was expected. However, attempts to prepare neutral analogues of 4 from [3] -salts and 8 ] [8] is one of the products of the title reaction described previously, [8] whereas [Co 9 Te 3 {µ 5 -CpЈ 2 Nb(CO)-Te} 3 (CO) 8 ] (5) forms in the reaction of 2 with [Co 2 (CO) 8 ] in boiling toluene.…”

“…We have recently reported on the electron-sponge behavior of cluster anions [Co 11 Te 7 (CO) 10 ] n-([1] -) and [Co 11 Te 5 (CO) 15 ] n-(n = 1,2) built up of the pentagonal-prismatic Co@Co 10 polyhedron and shells of µ 4 -and µ 5 -Te bridges and terminal or bridging CO groups (Figure 1). [4,5] These anions form in the reaction of [Cp* 2 NbTe 2 H] (Cp* = C 5 Me 5 ) with [Co 2 (CO) 8 ].…”

Gold–Heterometal Interactions and Bonds

“…They include neutral compounds such as (Ph 3 P)AuFe 2 (m-S i Pr)(m-CO)(CO) 6 By far, most of the tetranuclear species exhibit a butterfly structure folded over a transannular metal-metal bond. For Au/Fe clusters this includes one (R 3 P)Au unit bridging the metal atoms of a Fe-Fe, Fe-Ru or Fe-Co bond in compounds with (AuFe 2 )Fe [249][250][251][252][253][254], (AuFe 2 )Co [255], (AuFeRu)Co [256] and (AuFeCo)Co [257] cores, or two (R 3 P)Au units bridging the Fe-Pt bond in an (AuFePt)Au core [258]. A similar butterfly structure was observed in [(m-dppm) 2 Au 3 Fe(CO) 4 ]Cl 205, which contains a Fe (CO) 4 fragment bridging two Au atoms [Au-Fe 2.518(2)/2.538(1) Å], with the other two edges of the triangular Au 3 system being each spanned by the dppm ligands [259].…”

Reactivities of the chalcogen-capped triiron clusters [EFe3(CO)9]2– (E = Te, Se, S): cluster growth and transformations

“…[TeFe 3 (CO) 9 ] 2-1 has been reported to react with acids to form the Fe-Fe bridged monohydrido cluster [HTeFe 3 (CO) 9 ] -18 and the dihydrido cluster H 2 TeFe 3 (CO) 9 [22,23]. Cluster 1 can also be easily protonated in MeOH to form the monohydrido cluster 18 [24].…”

“…Cluster 1 can also be easily protonated in MeOH to form the monohydrido cluster 18 [24]. Similar to the protonation, the treatment of 1 with PPh 3 Au + or PhHg + yields the Fe-Fe bridged clusters [TeFe 3 (µ-AuPPh 4 )] -and [TeFe 3 (µ-HgPh)] -, respectively [23]. On the other hand, the reaction of 1 with CuCl forms the Fe-Fe bridged cluster [TeFe 3 (CO) 9 (µ-CuCl)] 2-with CuCl intact [22].…”