Fluorénacènes et fluorénaphènes Synthèses dans la série des indéno‐fluorènes X. Exo‐cis‐fluorénaphène

Abstract

Volumen 49, Fasciculus 6 (1966) -No. 229-230 1931 sich trotzdem Komplexe mit der Koordinationszahl 5 bilden, ist deshalb sehr bemerkenswert . Die Tabelle gibt eine Ubersicht uber die Komplexe, fur welche bereits gute analytische Daten vorliegen. Auch die metallfreien Liganden wurden in die Tabelle aufgenommen. Diese Arbeiten wurden durch den SCHWEIZ. NATIONALFONDS unterstutzt (Projekt Nr. A 223/ 2843). SUMMARY A new terdentate ligand bis-(diphenylphosphinoethy1)-sulfide (PSP) and a new quadridentate ligand 1,Z-bis-(diphenylphosphinoethylt hio) -et hane (P S SP) (structures see page 1928) have been synthesized and their Nil1-and Pd'I-complexes have been studied. There is good evidence that the metal has coordination number five in some of these complexes containing halogen (C1, Br, J).

Straightforward Synthesis and Properties of Highly Fluorescent [5]‐ and [7]‐Helical Dispiroindeno[2,1‐c]fluorenes

“…Only ah andful of reports have been published for the preparation of DHIF and its substituted derivatives. [60][61][62][63] Worth mentioning are works by Chen, [64] Liu, [58] Yuan, [65] and especially by Poriel. [26,33] Synthesis of fully conjugated indeno[2,1-c]fluorenes was reported by Haley.…”

Dihydroindenofluorenes as building units in organic semiconductors for organic electronics

“…Finally, the synthesis of the last positional isomer, [2,1- c ]DHIF , also originates from the sixties (Scheme 23) and involves either the condensation of bis-indene 92 and maleic anhydride 55 172 or, in a longer process, the syntheses of dione [2,1- c ]IF(O) 2 from the propiophenone 94 . 173…”

Straightforward Synthesis and Properties of Highly Fluorescent [5]‐ and [7]‐Helical Dispiroindeno[2,1‐c]fluorenes

“…The indeno[2,1‐ c ]fluorene (IF) core in 5,8‐dihydroindeno[2,1‐ c ]fluorene (DHIF) (Figure ) represents a suitable structural motif for a combination of helicity with SBF, but the lack of synthetic procedures or a general synthetic methodology for its preparation limits further insight to structure‐property relationship and complicates tuning of the physical properties. Only a handful of reports have been published for the preparation of DHIF and its substituted derivatives . Worth mentioning are works by Chen, Liu, Yuan, and especially by Poriel .…”