1,2‐Bis‐<i>N</i>‐[2′‐(diphenylphosphanyl)benzoyl]diaminobenzene, a New Chelating Ligand with Versatile Coordination Properties

Burger, Sylvain; Therrien, Bruno; Süß‐Fink, Georg

doi:10.1002/ejic.200300360

Cited by 34 publications

(20 citation statements)

References 27 publications

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“…Exploiting the methodology developed by Trost et al [95,96], Süss-Fink applied his modular approach to generate a family of trans-diphosphine ligands 9-11 by using different spacers and combining amide and ester linkages [97][98][99]. Ligands 9-11 are (as Trost's ligands) 2-diphenylphosphino benzoic acid derivatives formed by condensation with different diamines (9), diols (10) and aminoalcohols (11).…”

Section: General Description Of the Known Ligands: Main Coordination mentioning

confidence: 99%

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Trans-chelating diphosphines, the elusive ligands!

Freixa

Leeuwen

2008

Coordination Chemistry Reviews

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Section: General Description Of the Known Ligands: Main Coordination mentioning

confidence: 99%

“…Many square-planar trans-complexes as IrL(CO)Cl, RhL(CO)Cl, PtLCl 2 , PtLI 2 or PdLCl 2 have been characterized by means of spectroscopic techniques and several X-ray structures confirmed the ligand arrangement (see Table 6) [97][98][99]101,102].…”

Section: General Description Of the Known Ligands: Main Coordination mentioning

confidence: 99%

Trans-chelating diphosphines, the elusive ligands!

Freixa

Leeuwen

2008

Coordination Chemistry Reviews

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“…± The 2-(diphenylphosphino)benzoic acid, easily available by Wurtz coupling from sodium 2-chlorobenzoate and sodium diphenylphosphide [19], is an attractive building block for the synthesis of P,P-linked bis [phosphine] ligands by condensation of the acid function with diols, diamines, or amino alcohols [20]. Peptidic coupling between benzene 1,2-diamine, naphthalene-1,8-diamine, or racemic transcyclohexane-1,2-diamine and 2-(diphenylphosphino)benzoic acid afforded the diphos ligands pbpb [16], nbpb [17], and cbpb [18] in good yields (see Fig. 1).…”

Section: Trans-coordination Of the Diphos Ligand Pbpbz Generating Squmentioning

confidence: 99%

“…These diphos ligands are expected to form trans-coordinated square-planar complexes comprising a 13-or 14-membered metallacycle due to their rigid C-framework. Accordingly, the Pd II complex trans-[Pd(pbpb)Cl 2 ] has been synthesized and structurally characterized [16].…”

Section: Trans-coordination Of the Diphos Ligand Pbpbz Generating Squmentioning

confidence: 99%

Square‐Planar Carbonylchlororhodium(I) Complexes Containing trans‐Spanning Diphosphine Ligands as Catalysts for the Carbonylation of Methanol

Burger

Therrien

Süß‐Fink

2005

Helvetica Chimica Acta

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Dedicated to Professor AndreÂ Merbach on the occasion of this 65th birthdayThe rhodium(I) complexes trans-[Rh(diphos)(CO)Cl] 7 (diphos pbpb), 8 (diphos nbpb), and 9 (diphos cbpb) were synthesized (Scheme 4) and used as catalysts for the carbonylation of MeOH to AcOH (Scheme 1). The trans coordination imposed by the rigid C-spacer framework of the diphos ligands pbpb, nbpb, and cbpb, demonstrated by 31 P-NMR and IR spectroscopy of 7 ± 9 and unambiguously confirmed by singlecrystal X-ray structure analysis of 7, improved the thermal stability of the rhodium(I) system under carbonylation conditions and, hence, the catalytic performance of the complexes. For the catalytic carbonylation of MeOH, the active catalyst could be prepared in situ from the mixture of [Rh(CO) 2 Cl] 2 and the corresponding diphos ligand pbpb, nbpb, or cbpb, giving the same results as carbonylation in the presence of the isolated complexes 7, 8 or 9 (see Table). The highest activity was observed for complex 7 (or the mixture [Rh(CO) 2 Cl] 2 / pbpb, the catalytic turnover number (TON) being 950 after 15 min (1708, 22 bar). The anion cis-[Rh(CO) 2 I 2 ] À was found to be the initial catalytically active species [3]. As the rate-determining step of the catalytic cycle is the oxidative addition of MeI to cis-[Rh(CO) 2 I 2 ] À [4], electron enrichment at the metal center is expected to facilitate this step and to improve the rate of AcOH formation. Consequently, square-planar rhodium(I) complexes with ligands that increase the electron density at the Rh-atom have been developed and studied as catalysts; they give better or at least comparable activities than the original Monsanto catalyst [5 ± 8]. Introduction. ± The carbonylation of MeOH to generate AcOH is one of the most important homogeneously catalyzed industrial processes [1] (Scheme 1). The production of AcOH by the

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“…Diphosphine ligands have been used in particular for the synthesis of catalysts for allylic alkylation [2] and for methanol carbonylation [3]. Tetradentate C 2 -symmetric ligands, possessing two phosphine groups and two other heteroatoms which increase the electron density at the metal centre, have been intensively studied [3][4][5][6][7]. Ligands of this type have been prepared to optimise the catalytic potential of their transition metal complexes [3].…”

Section: Introductionmentioning

confidence: 99%

New dinuclear arene ruthenium complexes with P,S- or P,O-chelating ligands

Burger

Therrien

Süß‐Fink

2004

Inorganica Chimica Acta

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Two equivalents of 2-diphenylphosphinobenzoic acid react with 1,2-ethanedithiol and 1,8-diaminonaphthalene under peptidic coupling conditions to give the new ligands 1,2-bis-S-[2 0 -(diphenylphosphino)benzoyl]dithioethane (dppte) (1) and 1,2-bis-N-[2 0 -(diphenylphosphino)benzoyl]diaminonaphthalene (dppan) (2), respectively. 1 and 2 have been characterised by mass spectrometry, elemental analysis, NMR, IR spectroscopy, and by single-crystal X-ray structure analysis. 2 is easily oxidised by air to give the monophosphine oxide derivatives (3). Single-crystal X-ray structure analysis of 3 shows an intramolecular hydrogen bond between an amido and the phosphoryl oxygen atom. Compounds 1 and 2 react with [RuCl 2 (g 6 -p-cymene)] 2 to give the dinuclear complexes [RuCl(g 6 -p-cymene)(dppte)RuCl(g 6 -p-cymene)] 2þ (4) and [RuCl(g 6 -p-cymene)(dppan)RuCl(g 6 -p-cymene)] 2þ (5). As determined by single-crystal X-ray structure analysis, 4 and 5 adopt different coordination modes to the ruthenium atoms. In 4 the symmetric dppte ligand is P ; S coordinated to the ruthenium atom, whereas in 5 the dppan ligand prefers a P ; O coordination mode.

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1,2‐Bis‐N‐[2′‐(diphenylphosphanyl)benzoyl]diaminobenzene, a New Chelating Ligand with Versatile Coordination Properties

Cited by 34 publications

References 27 publications

Trans-chelating diphosphines, the elusive ligands!

Trans-chelating diphosphines, the elusive ligands!

Square‐Planar Carbonylchlororhodium(I) Complexes Containing trans‐Spanning Diphosphine Ligands as Catalysts for the Carbonylation of Methanol

New dinuclear arene ruthenium complexes with P,S- or P,O-chelating ligands

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