Synthesis of triple-decker iron and cobalt complexes with a central tetramethylphospholyl ligand

Abstract

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Bonding, Metal‐Atom Dynamics and Hyperfine Interactions of η‐Phospholyl‐ and η‐Pentaphospholyliron Complexes

“…Complexes 1, [24] 2, [25] 3, [8] 4, [26] 5, [1] 6, [27] 7 [1] and 8, [27] were prepared as described in the literature. All of the compounds examined in this study were rapidly transferred from sealed ampoules to screw-cap perspex sample holders, sealed with Teflon tape and rapidly cooled to 78 K. Mössbauer spectra were recorded at increasing temperatures (in 20 K steps) to the maximum temperature, and then in a cooling mode to ascertain the reversibility of the data.…”

Synthesis of cationic complexes [(C4Me4)CoL]+ (L is naphthalene, phenanthrene, and anthracene)

“…1- 6 We have recently de scribed the efficient methods for the syntheses of the co balt tetramethylcyclobutadiene complexes with five elec tron ligands of different types. [7][8][9][10][11][12][13] In this work, we syn thesized the [Cb*CoL] + complexes (Cb* = C 4 Me 4 , L is polyarene).…”

A synthetic, structural and reactivity study of [(η4-C4R4)Co(η5-C5H4X)] complexes, R=Me or Et; X=CHO, CHCHFc, CHCH(η5-C5H4)Co(η4-C4Ph4), CHC(CN)2: Unexpected formation of [(η5-cyclopentadienyl)(η4-3,4,5,6-tetraethyl-α-pyrone)cobalt]

“…They are best prepared by the method described above, but have also been prepared from g 3 -cyclobutenonylcobalt complexes [29]. In the intervening years many isometallocenes, incorporating a wide range of metal centres, have been described [29][30][31][32]. In 1987, Pauson et al reported a series of (tetramethylcyclobutadiene)isocobaltocenium salts of the general formula [(g 4 -C 4 Me 4 )Co(g 6 -arene)] + [33].…”

“…In 1987, Pauson et al reported a series of (tetramethylcyclobutadiene)isocobaltocenium salts of the general formula [(g 4 -C 4 Me 4 )Co(g 6 -arene)] + [33]. These were prepared by refluxing [(g 4 -C 4 Me 4 )Co(CO) 2 in stacking reactions [32], and other ligand displacement processes [10].…”