Isocyanidruthenate ‐ Analoga von Tetracarbonylferrat

Abstract

Das Substanzgemisch, ca. 70% 3 a und 30% 8a[Z'] [jeweils als (a/(@-Isomere], bezeichnet als C16-AC, wurde auf die Hemmung des Tumonvachstums getestet. Die Ergebnisse mit C16-AC sind in Tabelle 1 zusammengefafit.

Dianionic Iron and Ruthenium(2−) Biphosphinine Complexes: A Formal d10 Ruthenium Complex with a Square Planar Geometry

“…Though the Collman's reagent [Fe(CO) 4 ] 2− is probably one of the most popular and useful reagents in organic synthesis,1 our knowledge of dianionic Group 8 metal complexes still remains limited. In addition to the carbonyl ruthenium analogue [Ru(CO) 4 ] 2− , only a few other complexes are known: the complete series of PF 3 derivatives [M(PF 3 ) 4 ] 2− (M=Fe, Ru, Os),2 the isocyanide complexes [Ru(CNR) 4 ] 2− synthesized by Cooper and co‐workers,3 and the amazing Jonas' iron complexes [Fe(C 2 H 4 ) 4 ] 2− and [Fe(cod) 2 ] 2− (cod=cycloocta‐1,5‐diene) 4. We have begun to explore the use of sophisticated phosphinine‐based ligands in an effort to design phosphorus equivalents of carbonyl ligands 5.…”

[Fe(CNXyl)4]2−: An Isolable and Structurally Characterized Homoleptic Isocyanidemetalate Dianion

“…Subsequently, related monoanionic complexes were established, including [Mn(CNXyl) 5 ] − ,4 [V(CNXyl) 6 ] − ,5 and [Ta(CNXyl) 6 ] − 6. Cooper and co‐workers also reported on quite thermally unstable isocyanideruthenates, and provisionally formulated these species as the first dianions of this class, [Ru(CNR) 4 ] 2− (R=Xyl and t Bu) 7. Neither salt could be isolated, and their characterizations were mainly based on their reactions with suitable main‐group halides, E‐X, to afford appropriate products, that is, Ru(CNR) 4 E 2 8.…”

Metallocages for Metal Anions: Highly Charged [Co@Ge9]5− and [Ru@Sn9]6− Clusters Featuring Spherically Encapsulated Co1− and Ru2− Anions

“…[36] TheS n À Sn distances (3.0512(8)-3.1409(6) )a re in anarrow range and on average considerably longer than those in empty [Sn 9 ] 4À (typically below 3 )b ut within the range of 2.86-3.64 observed in binary RuÀSn compounds.A ssuming an [Sn 9 ] 4À host polyhedron with an elongated trigonal-prismatic structure, [35] the endohedral Ru atom must also provide 10 electrons to the system, resulting in aformally twofold negatively charge for Ru. Compounds with Ru(ÀII) are rare,b ut have been found in isonitrile [37] and biphosphinine [38] complexes, whereas to the only known intermetalloid cluster, [Ru@Ge 12 ] 3À was attributed Ru(ÀI). [14c] An inspection of other [Sn 9 ]u nits reveals different structures for the empty,t he Co-filled, and the Ni-filled 22electron clusters,n amely C 4v for [Sn 9 ] 4À , [31] [Ni@Sn 9 ] 4À , [18a,b] and for the partially oxidized [Co 0.68 @Sn 9 ] 4À cluster with 21 SE, [15c] while [Cu@Sn 9 ] 3À shows D 3h symmetry.…”