Cyclopentadienthion

Abstract

I Abb. 2. Newman-Projektion von (1) entlang der Bindungen C 1 4 2 und C3-C4 (C5 und C6 unten, C7 oben). Q Verlag Chemie GmbH, 0-6940 Weinheim, 1981 0044-8249/81/0707-0604 . $ 02.50/0 Angew. Chem. 93 (1981) Nr. 6/7

Application of Electron-Withdrawing Coordinatively Unsaturated η6-Arene β-Diketiminato–Ruthenium Complexes in Lewis Acid Catalyzed Diels–Alder Reactions

“…Moreover, Diàz-Àlvarez et al prepared mono- and dicationic Ru(II) half-sandwich complexes bearing a tricyclic β-iminophosphine P , N -donor ligand demonstrating moderate to good enantio- and diastereoselectivity . Further information regarding ruthenium Lewis acid catalyzed Diels–Alder reactions is available from the corresponding reviews. − …”

Sulfur Oxides as Ligands in Coordination Compounds

“…The spectroscopic data, particularly v(SO), cannot however be reconciled with the formulation of the products as octahedral Ir"' complexes. The iron complex 2 is formed in surprisingly good yield according to Equation (12). [291 Complexes 2, 15a, and 16a can also be obtained by oxidation of the corresponding SO complexes (see Section 3.3).…”

“…The reactions (7) to (12) are of minor importance as synthetic routes to SO2 complexes but they demonstrate the diverse reactivity of sulfur-oxygen compounds with respect to transition-metal centers.…”

(Pentafluoro‐λ6‐sulfanyl)cyclopentadiene and Cyclopentadienylidenetetrafluoro‐λ6‐sulfane

“…Crystal structure of the dimer 12. u = 935.1(1). b =1083.8(2), c = 1292.9(2) pm, / 3 = 91.77(2)", Y = 1310.3(3) x lo6 pm3, 7'= -143 "C, P2,/c, Z = 4; 1883 measured, 1718 unique reflections, of which 1613 had F > 3u(F), 229 parameters; all non-hydrogen atoms refined anisotropically; R = 0.033, R, = 0.030; full matrix, SHELX 76 and 86[11]. and is obtained in high yield without any other dimers present according to NMR spectroscopy, the conversion 8 a + 8 b is essential.…”