μ₂‐E[V(CO)₃diphos]₂ (E = S, Se, Te): Complexes with Linear VEV Multiple‐Bond Systems

Abstract

2b (air-stable, brown crystals; m.p. 112"C), isolated in 85-95% yield, has the structure of a previously unknown p3,$-methylenegermanediyl complex and results from addition of CH, to the Mn=Ge multiple bond of l b ; the seemingly much less reactive Mn-Ge single bonds are not affected by diazomethane.[**I This work was supported by the Deutsche Forschungsgemeinschaft, the Fonds der Chemischen Industrie, and by gifts of chemicals from BASF AG, Ludwigshafen, and DEGUSSA AG, Hanau. We are grateful to Drs. G . Longe, W. Buchner, and D. Scheutzow for the MS and NMR spectra. Angew. Chem. In<. Ed. Engl. 22 (1983) No. 12

Binary Vanadium Chalcogenide Complexes

“…Complexes containing linear V−E−V multiple-bond systems have been obtained by treating Na[V(CO) 4 L] (L = diphos, dppe) with Na 2 EO 3 , Na 2 S, , or H 2 S . The reactions lead to (μ 2 -E)[V(CO) 3 L] 2 , the V−E−V bond order lying between double and triple as in the case of related CpCr and CpMo complexes.…”

Non-oxido divanadium(iv) and divanadium(v) thiolate complexes with a new type of chalcogenide bridging motif

“…13 Particularly, examples of non-oxido divanadium cores containing chalcogenide bridges are extremely limited. 1,2,4,14 Among this group, the bridging motifs that are structurally characterized can be classified as 1a). In this work, we report several non-oxido divanadium complexes with chalcogenide and dichalcogenide as bridges.…”

Multiple Bonding of Titanium and Vanadium to the Heavier Chalcogens: Syntheses and Structures of the Terminal Selenido and Tellurido Complexes [η4-Me8taa]ME (M = Ti, V; E = Se, Te)

“…Unlike Schrock's [η 4 -N(CH 2 CH 2 NSiMe 3 ) 3 ]VTe, which is the only other example of a terminal vanadium tellurido complex, [η 4 -Me 8 taa]VTe is sufficiently stable to permit characterization by X-ray diffraction . Consistent with the presence of a multiple bond, the VTe bond lengths in the two crystallographically independent molecules [2.433(1) and 2.435(1) Å] are shorter than those in the bridging vanadium tellurido complex [V(CO) 3 (dppe)] 2 (μ 2 -Te) [2.514(3) and 2.522(3) Å]. , …”