Cyclopropene als komplexliganden. Die bildung neuartiger liganden bei der umsetzung von diphenylcyclopropenthion mit Fe2(CO)9. Die kristallstrukturen eines carben-komplexes mit einem Fe3S2-cluster, C3Ph2Fe3S2(CO)8, und einer dithiodiketon-vierbindung C6Ph4S2Fe2(CO)6

Structural Characterization of the Product of Intramolecular Oxygen Transfer from a Ketone to CO within the Coordination Sphere of a Zr−Fe Heterodimetallic Complex

“…The 1,2-diphenylcyclopropenylidene ligand, first introduced to organometallic chemistry by Öfele in 1968, is coordinated to the chiral iron center and is the result of the oxygen transfer from the cyclopropenone. The Fe(1)−C(55) bond of this carbene ligand of 1.860(5) Å is shorter than the corresponding value in the only previously structurally characterized iron complex bearing this molecular fragment (1.901(7) Å in a trinuclear iron cluster) . The intracyclic C−C bond lengths in the cyclopropenylidene unit are similar to those found in related complexes, the C(56)−C(57) bond being shorter (1.340(6) Å) than the other two C−C distances (1.414(6) and 1.406(6) Å), indicating a partial double-bond character.…”

Cyclopropenylium Cations, Cyclopropenones, and HeteroanaloguesRecent Advances

“…The reaction of diphenylcyclopropenethione with Fe 2 (CO) 9 gave a complex having a triafulvene structure 441 and a carbene complex 442. 393 The structures have been determined by X-ray analysis for complexes 439-442.…”

A Cyclopropenylidene Approach to Tricarbide Complexes: Synthesis and Structure of [M(CO)5{μ2-C3(OCH2CH3)}Fe(CO)2(Cp)] (M = Cr, Mo, W)

“…While dimetal-substituted cyclopropenylidenes are unprecedented, several monometal-substituted cyclopropenylidenes ,− and cyclopropenium salts − ,, are known. Despite the fact that we are able to displace the ethoxide group from 4 with NH(CH 3 ) 2 to form [Cr(CO) 5 {μ 2 -C 3 (NMe 2 )}Fe(CO) 2 (Cp)], we have not been able to generate [M(CO) 5 (μ-C 3 ){Fe(CO) 2 (Cp)} 2 ] either by reacting the diethoxycyclopropenylidenes 1 − 3 with 2 equiv of K[Fe(CO) 2 (Cp)] or by displacing the ethoxide substituents from 4 − 6 by using K[Fe(CO) 2 (Cp)] in THF at room temperature.…”

“…34 The solution infrared spectra (CH 2 Cl 2 ) display four characteristic carbonyl stretching absorptions, tentatively assigned as two Fe-CO absorptions at 2060, 2000 cm -1 and two group 6 M-CO absorptions at 2050, 1920 cm -1 . While dimetal-substituted cyclopropenylidenes are unprecedented, several monometal-substituted cyclopropenylidenes 23, [35][36][37][38][39][40][41][42][43] and cyclopropenium salts [37][38][39]44,45 are known. Despite the fact that we are able to displace the ethoxide group from 4 with NH(CH 3 ) 2 to form [Cr-(CO) 5 {µ 2 -C 3 (NMe 2 )}Fe(CO) 2 (Cp)], 46 we have not been able to generate [M(CO) 5 (µ-C 3 ){Fe(CO) 2 (Cp)} 2 ] either by reacting the diethoxycyclopropenylidenes 1-3 with 2 equiv of K[Fe(CO) 2 (Cp)] or by displacing the ethoxide substituents from 4-6 by using K[Fe(CO) 2 (Cp)] in THF at room temperature.…”