Synthesis and structures of ferrocenyl-substituted salicylaldiminato complexes of magnesium, titanium and zirconium

RKJ Bott; M Schormann; DL Hughes; SJ Lancaster; M Bochmann

doi:10.1016/j.poly.2005.07.012

Synthesis and structures of ferrocenyl-substituted salicylaldiminato complexes of magnesium, titanium and zirconium

RKJ Bott, M Schormann, DL Hughes, SJ Lancaster, M Bochmann

Research output: Contribution to journal › Article › peer-review

22 Citations (Scopus)

Abstract

N-ferrocenyl salicylaldimine (FcPI)H, readily accessible from aminoferrocene and salicylaldehyde, reacts with dibutylmagnesium in THF to afford a red crystalline (FcPI)₂Mg(THF)₂ (2). The reactions of the Li(FcPI) with CpTiCl₃ gave CpTiCl₂(FcPI) · CH₂Cl₂ (4), whereas with CpZrCl₃ · DME a mixture of three products is formed: CpZrCl(FcPI)₂ (5), CpZrCl₂(FcPI) (6), and (FcPI)₂ZrCl₂ · CH₂Cl₂ (3 · CH₂Cl₂). The crystal structures of compounds 2–6 are reported. Typically, the N–O chelates are oriented such that O donors are mutually trans, while N donors prefer to be trans to Cl ligands. The redox potentials of these complexes are very similar to ferrocene. On activation with methylaluminoxane, the Ti complex 4 shows moderate activity for ethylene polymerisation, while (FcPI)₂ZrCl₂ is highly active for the oligomerisation of ethylene, to give products with average degrees of polymerisation of 12–16.

Original language	English
Pages (from-to)	387-396
Number of pages	10
Journal	Polyhedron
Volume	25
Issue number	2
DOIs	https://doi.org/10.1016/j.poly.2005.07.012
Publication status	Published - 2006

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10.1016/j.poly.2005.07.012

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@article{0a44b64c2670439c8a2f4b4705ba5c14,

title = "Synthesis and structures of ferrocenyl-substituted salicylaldiminato complexes of magnesium, titanium and zirconium",

abstract = "N-ferrocenyl salicylaldimine (FcPI)H, readily accessible from aminoferrocene and salicylaldehyde, reacts with dibutylmagnesium in THF to afford a red crystalline (FcPI)2Mg(THF)2 (2). The reactions of the Li(FcPI) with CpTiCl3 gave CpTiCl2(FcPI) · CH2Cl2 (4), whereas with CpZrCl3 · DME a mixture of three products is formed: CpZrCl(FcPI)2 (5), CpZrCl2(FcPI) (6), and (FcPI)2ZrCl2 · CH2Cl2 (3 · CH2Cl2). The crystal structures of compounds 2–6 are reported. Typically, the N–O chelates are oriented such that O donors are mutually trans, while N donors prefer to be trans to Cl ligands. The redox potentials of these complexes are very similar to ferrocene. On activation with methylaluminoxane, the Ti complex 4 shows moderate activity for ethylene polymerisation, while (FcPI)2ZrCl2 is highly active for the oligomerisation of ethylene, to give products with average degrees of polymerisation of 12–16.",

author = "RKJ Bott and M Schormann and DL Hughes and SJ Lancaster and M Bochmann",

year = "2006",

doi = "10.1016/j.poly.2005.07.012",

language = "English",

volume = "25",

pages = "387--396",

journal = "Polyhedron",

issn = "0277-5387",

publisher = "Elsevier",

number = "2",

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TY - JOUR

T1 - Synthesis and structures of ferrocenyl-substituted salicylaldiminato complexes of magnesium, titanium and zirconium

AU - Bott, RKJ

AU - Schormann, M

AU - Hughes, DL

AU - Lancaster, SJ

AU - Bochmann, M

PY - 2006

Y1 - 2006

N2 - N-ferrocenyl salicylaldimine (FcPI)H, readily accessible from aminoferrocene and salicylaldehyde, reacts with dibutylmagnesium in THF to afford a red crystalline (FcPI)2Mg(THF)2 (2). The reactions of the Li(FcPI) with CpTiCl3 gave CpTiCl2(FcPI) · CH2Cl2 (4), whereas with CpZrCl3 · DME a mixture of three products is formed: CpZrCl(FcPI)2 (5), CpZrCl2(FcPI) (6), and (FcPI)2ZrCl2 · CH2Cl2 (3 · CH2Cl2). The crystal structures of compounds 2–6 are reported. Typically, the N–O chelates are oriented such that O donors are mutually trans, while N donors prefer to be trans to Cl ligands. The redox potentials of these complexes are very similar to ferrocene. On activation with methylaluminoxane, the Ti complex 4 shows moderate activity for ethylene polymerisation, while (FcPI)2ZrCl2 is highly active for the oligomerisation of ethylene, to give products with average degrees of polymerisation of 12–16.

AB - N-ferrocenyl salicylaldimine (FcPI)H, readily accessible from aminoferrocene and salicylaldehyde, reacts with dibutylmagnesium in THF to afford a red crystalline (FcPI)2Mg(THF)2 (2). The reactions of the Li(FcPI) with CpTiCl3 gave CpTiCl2(FcPI) · CH2Cl2 (4), whereas with CpZrCl3 · DME a mixture of three products is formed: CpZrCl(FcPI)2 (5), CpZrCl2(FcPI) (6), and (FcPI)2ZrCl2 · CH2Cl2 (3 · CH2Cl2). The crystal structures of compounds 2–6 are reported. Typically, the N–O chelates are oriented such that O donors are mutually trans, while N donors prefer to be trans to Cl ligands. The redox potentials of these complexes are very similar to ferrocene. On activation with methylaluminoxane, the Ti complex 4 shows moderate activity for ethylene polymerisation, while (FcPI)2ZrCl2 is highly active for the oligomerisation of ethylene, to give products with average degrees of polymerisation of 12–16.

U2 - 10.1016/j.poly.2005.07.012

DO - 10.1016/j.poly.2005.07.012

M3 - Article

VL - 25

SP - 387

EP - 396

JO - Polyhedron

JF - Polyhedron

SN - 0277-5387

IS - 2

ER -