Coordination Chemistry of Pentacarbonylrheniumacetylide Complexes with Copper, Silver, and Gold(I): (OC)5ReC≡CRe(CO)5 as Ligand

Abstract

The dirhenioethyne (OC) 5-ReCCRe(CO) 5 (1) behaves as an h 2

Synthesis of Novel Heterotetrametallic (d6-d10-d8) Polyalkynyl Complexes Starting from Heterobimetallic Chloride-Bridged (d6-d8) Compounds

“…All the alkynyl ligands are η 2 ‐bonded to Cu atoms in such a way that each Cu is stabilized by two alkyne entities (one associated with each metal fragment). The Cu−C α [1.984(8)−2.098(7) Å] and Cu−C β [2.080(7)−2.230(8) Å] distances are, as expected, shorter than the corresponding Ag−C distances in [Pt 2 Ag 2 (C 6 F 5 ) 4 (C≡CPh) 4 ] 2− ,16j but are comparable to those found in related systems such as [Pt 2 Cu 4 (C≡CPh) 8 ] 3 [Cu−C α = 1.981(8)−2.019(8) Å; Cu−C β = 2.141(9)−2.161(9) Å],19 [Ir 2 Cu 4 (C≡CPh) 8 (PPh 3 ) 2 ] [Cu−C α = 1.981(8)−2.019(8) Å; Cu−C β = 2.141(9)−2.161(9) Å],16a,16b [Mn 2 Cu(μ‐C≡C t Bu) 2 (CO) 6 (dppe) 2 ] + [Cu−C average = 2.081(10) Å],20 and [{Re(CO) 5 −C≡C−Re(CO) 5 } 2 Cu] + [Cu−C average = 2.055(10) Å] 17. The parameters for the acetylenic fragments (C−C distances, angles at C α and C β ) lie within the normal ranges for alkynyl σ,π bonding modes 4,16−20.…”

To “Dress” the “Naked” Acetylide with Metal Complexes: How and Why?

“…In addition, complex 3 , which has a ReRe bond of 3.099 Å, shows that complexes with metal–metal interactions predominate for the [M] 3 C 2 complexes 8c. Additional examples of related complexes of the type E encompass Cu I , Ag I , and Au I derivatives ( 5 – 7 ) 8d. Another interesting [M] 4 C 8 complex, which contains two [TiCu 2 ]C 2 subunits, was reported by Lang et al ( 8 ; CuCu 2.998 Å) 9.…”

Polyynes

“…It is well-known that organometallic alkynes exhibit rich coordination chemistry with Cu(i), Ag(i) and Au(i) [214][215][216][217][218], however, photophysical properties of these p-coordinated compounds are rare. Recent work by Yam and coworkers has shown that luminescent mixed-metal alkynyl complexes could be synthesized by the metalloligand approach using the rhenium(i) diimine alkynyl complexes as the h 2 -ligand.…”