Chalcogenide Complexes of Cyclopentadienylnickel with Heterocyclic Carbene

Reactions of Schiff Base‐Substituted Diselenides and ‐tellurides with Ni(II), Pd(II) and Pt(II) Phosphine Complexes

“…Of all ca. 40 structurally characterized compounds with a Ni–Te bond, [Ni(NH‐C 6 H 4 ‐Te) 2 ] as well as [(NiCp i Pr 4 ) 2 ‐µ 2 ‐(Te 2 )] (2.440(2) Å), [ 57 ] [(NiCp i Pr 4 ) 2 ‐µ‐(Te) 2 ] (2.44–2.45 Å), [ 58 ] [CpFe(C 5 H 4 )‐Te(I) 2 Ni(NHC)Cp] (2.4407(8) Å) [ 59 ] and (µ 4 ‐telluro)‐hexakis(µ 3 ‐telluro)‐bis(µ 2 ‐bis(diphenylphosphino)methane)‐bis(η 5 ‐ tert ‐butylcyclopentadienyl)‐pentanickeldiniobium (2.436(5) Å) [ 60 ] show the overall shortest Ni–Te bond lengths. The Ni–Te bond in [Ni(L Te )(PPh 3 )] is therefore not only the shortest so far crystallographically determined Ni–Te bond length for an aryltellurolato ligand, but also the shortest Ni–Te distance observed in any compound with a Ni–Te bond.…”

“…Selected bond lengths [Å] and angles (°) in the dichalcogenides {HL Y } 2 [30] and their nickel, palladium and platinum complexes [M(L Y )(PPh 3 )] (Y = Se, Te). [21,[25][26][27][28][29]34,[36][37][38] and platinum [39][40][41][42][43][44][45][46][47][48][49][50][51][52] [53] Ni(TeMes)Cp(PEt 3 ), [54] [W(CO) 5 -μ-(TePh)NiCp(PPh 3 )] [55] and [57] [(NiCpiPr 4 ) 2 -μ-( Te) 2 ] (2.44-2.45 Å), [58] [CpFe(C 5 H 4 )-Te(I) 2 -Ni(NHC)Cp] (2.4407(8) Å) [59] and (μ 4 -telluro)-hexakis(μ 3 -telluro)bis(μ 2 -bis(diphenylphosphino)methane)-bis(η 5 -tert-butylcyclopentadienyl)-pentanickeldiniobium (2.436(5) Å) [60] show the overall shortest Ni-Te bond lengths. (m/z = 538.0818) can be observed.…”

Chalcogen Bonds, Halogen Bonds and Halogen···Halogen Contacts in Di- and Tri-iododiorganyltellurium(IV) Derivatives

“…The second example is 1-oxa-4-telluracyclohexane 4,4-di-iodide (OTEHEX) [91] where the interacting I-atom is indeed located opposite to one of the tellurium's σ-holes, but the Te-I•••Te angle (156.8 • ) is not fully consistent with a ChB since the σ-hole is not pointing to the iodine's negative belt. A similar case of PEBHEN01 is also observed in (µ-η 5 -cyclopentadienyl)-bis(η 5 -cyclopentadienyl)-(1,3-dimethylimidazol-2ylidene)-bis(iodo)-iron-nickel-tellurium (LOFCOB) [92]. More insights into these infringing Te•••I contacts is provided in the theoretical section.…”

“…11, x FOR PEER REVIEW 7 of 17 dimethylimidazol-2-ylidene)-bis(iodo)-iron-nickel-tellurium (LOFCOB)[92]. More insights into these infringing Te•••I contacts is provided in the theoretical section.…”