Structure of the naphthyl iron(II) complex formed in the reaction of FeCl3 and C10H7Li

Catalysis of Oxo Transfer to Prochiral Sulfides by Oxovanadium(V) Compounds That Model the Active Center of Haloperoxidases

“…The crystal structure of 2 11 shows a ring‐centroid–Fe distance of 1.93 Å, which is a much longer distance than that expected for a low‐spin iron(II)–pentaisopropylcyclopentadienyl species, but closely resembles the known examples for high‐spin cyclopentadienyliron(II) species (Figure 1). 12, 13 The 2.04 Å Fe– ipso‐ C distance in 2 is shorter than the distances found for the anionic high‐spin Fe(II) complex [Fe(1‐naphthyl) 4 ] 2− (2.10 and 2.15 Å),14 but it is slightly longer than the distances between the low‐spin iron(II) and the aryl group (2.01 Å; average for three FeC (aryl) bonds) found for the tricarbonylchromium arene complex [(η 6 ‐C 6 H 3 Fp 3 ‐1,3,5)Cr(CO) 3 ] (Fp=CpFe(CO) 2 ) 15. With a ring centroid–iron– ipso ‐C angle of 177°, the FeC bond almost coincides with the C 5 axis of the ring ligand, as expected from steric repulsion of the aryl isopropyl groups by the tight alkyl belt of the 5 Cp ligand.…”

High‐Spin Cyclopentadienyl Complexes: A Single‐Molecule Magnet Based on the Aryl‐Iron(II) Cyclopentadienyl Type

“…[10] The crystal structure of 2 [11] shows a ring-centroid-Fe distance of 1.93 , which is a much longer distance than that expected for a low-spin iron(II)-pentaisopropylcyclopentadienyl species, but closely resembles the known examples for high-spin cyclopentadienyliron(II) species (Figure 1). [12,13] The 2.04 Fe-ipso-C distance in 2 is shorter than the distances found for the anionic high-spin Fe(II) complex [Fe(1-naphthyl) 4 ] 2À (2.10 and 2.15 ), [14] but it is slightly longer than the distances between the low-spin iron(II) and the aryl group (2.01 ; average for three FeÀ C (aryl) bonds) found for the tricarbonylchromium arene complex [(h 6 -C 6 H 3 Fp 3 -1,3,5)Cr(CO) 3 ] (Fp= CpFe(CO) 2 ). [15] With a ring centroid-iron-ipso-C angle of 1778, the Fe À C bond almost coincides with the C 5 axis of the ring ligand, as expected from steric repulsion of the aryl isopropyl groups by the tight alkyl belt of the 5 Cp ligand.…”

“…Hydrogen atoms omitted for clarity. Selected distances []: Fe1-C1 2.2601(11), Fe1-C2 2.2871(11), Fe1-C3 2.2854(10), Fe1-C4 2.2997(10), Fe1-C5 2.2707(10), Fe1-C60 2.0427(9), C1-C2 1.4361(14), C2-C3 1.4344(14), C3-C4 1.4373(13), C4-C5 1.4406(14), C5-C1 1.4350(13).…”

Mehrfachkoordination an Arene: die Koordination von sechs Rutheniumatomen an Naphthalin-1,8-diyl in [Ru6(μ6-C10H6)(μ3-PPh)(CO)14]

“…Untersuchungen zu diesen Verbindungen werden oft durch die schwierige Einführung des polycyclischen Arens in die Koordinationssphäre des Clusters erschwert. Sie beschränkten sich daher bisher hauptsächlich auf mono-und dinucleare Verbindungen mit Wechselwirkungen durch s-Bindungen wie in [Fe(C 10 H 7 ) 4 ][LiOEt 2 ] 2 [5] oder häufiger durch p-Komplexierung über h 2 -, h 4 -, h 6 -oder bisallylische h 3 :h 3 -Wechselwirkungen wie in den Verbindungen [Rh 2 (C 5 Me 5 ) 2 (1,2-h 2 -3,4-h 2 -C 10 H 8 )(PMe 3 ) 2 ], [6] [RhCp(h 4 -C 14 H 10 )], [7] [Ru(h 4 -C 8 H 12 )(h 6 -C 10 H 8 )] [8] und [Fe 2 (CO) 6 (mh 3 :h 3 -C 14 H 10 )]. [9] Eines unserer derzeitigen Ziele ist deshalb, [11] Kristallstrukturanalyse [13] 12 ] 4 werden an anderer Stelle beschrieben.…”

“…Gemäû der Oberfläche-Cluster-Analogie könnte Komplex 1 einer Struktur ähneln, die sich ergibt, wenn Naphthalin über vielfache Wechselwirkungen an einer Stufenversetzung auf einer (111)-Metalloberfläche chemisorbiert ist. [4] sowie Roesky et al [5] beschrieben. Seitdem haben viele Arbeitsgruppen die Reaktionen dieser Verbindungsklasse untersucht.…”