Use of the Salan Ligands To Form Bimetallic Aluminum Complexes

Atwood, David A.; Remington, Michael P.; Rutherford, Drew

doi:10.1021/om960505r

Cited by 31 publications

(13 citation statements)

References 21 publications

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“…[38,56] The observed bond lengths Al1-N1 and Al1-N1a#1 [AlMe 2 {3,5-tBu 2 -2-(O)C 6 H 2 CH=NR}] (R = 2,6-Me 2 C 6 H 3 or 2,6-iPr 2 C 6 H 3 ) [1.792(3), 1.792(3) Å] [32] and in the (monohydrido)aluminium complex [AlH{3-tBu-5-Me-2-(O)C 6 H 2 CH 2 -N2,6-iPr 2 C 6 H 3 }·NMe 3 ] [1.799(1) Å], [38] in which the nitrogen atom does not bridge two metal atoms. The values observed in 5 are in the range observed for other complexes with a bridging N atom [37,57,58] and comparable to Al-N dative bond lengths. [50,59] The six-membered ring chelate Al metallacycle is significantly twisted, angles between the planes containing the Al 2 N 2 and C 6 H 2 rings ranging from 32.88°to 33.48°.…”

Section: Resultssupporting

confidence: 77%

An Unusual N‐Bridged (Amido)(hydrido)(phenoxido)aluminium Dinuclear Compound – The Role of Nitrogen Substituents in Determining Nuclearity: A Combined Experimental and Theoretical Study

et al. 2010

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The iminophenol 3,5‐tBu2‐2‐(OH)C6H2CH=NR and theaminophenol 3,5‐tBu2‐2‐(OH)C6H2CH2‐NHR (R = tBu, 2,6‐Me2C6H3, C6F5) were prepared in good yields by the appropriate synthetic methods. Reactions of these compounds with AlH3·NEtMe2 in toluene gave the mononuclear [AlH{3,5‐tBu2‐2‐(O)C6H2CH2‐NR}·NEtMe2] [R = 2,6‐Me2C6H3 (3), C6F5 (4)] or dinuclear [AlH{μ‐3,5‐tBu2‐2‐(O)C6H2CH2‐NtBu}]2 (5) phenoxido–amido aluminium derivatives. All synthesized complexes were characterized by NMR spectroscopic and analytical methods. The X‐ray structure of 5 shows a dinuclear molecule in which the aluminium centres are unusually linked by μ2‐N(amido) atoms to form a central planar Al2N2 ring in a clearly preferential disposition over the more common Al2O2 ring. The experimental work has been assisted by the B3LYP functional and the 6‐31G* basis sets as implemented in Gaussian 03 calculations to determine the role played by the nitrogen substituent group in the structural disposition adopted by the prepared (monohydrido)aluminium compounds, in order to evaluate the factors affecting the coordination modes of the phenoxido–amido ligand on aluminium.

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Section: Resultssupporting

confidence: 77%

An Unusual N‐Bridged (Amido)(hydrido)(phenoxido)aluminium Dinuclear Compound – The Role of Nitrogen Substituents in Determining Nuclearity: A Combined Experimental and Theoretical Study

et al. 2010

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“…These ligands are expected to act as tetradentate ones through nitrogen and oxygen atoms, as confirmed by X-ray structures reported for similar ligands [16][17][18].…”

Section: Ir Spectrasupporting

confidence: 68%

Synthesis, characterisation and antifungal activity of a series of Cobalt(II) and Nickel(II) complexes with ligands derived from reduced N, N′-o-Phenylenebis(Salicylideneimine)

Belaïd

Landreau

Djebbar

et al. 2008

Transition Met Chem

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The synthesis and characterisation by elemental analysis, conductivity, FTIR, UV-Visible, ESR and magnetic measurements are described for a series of complexes of nickel(II) and cobalt(II) with three ligands (H 2 L 1-3 ) derived from reduced N, N 0 -o-Phenylenebis(salicylideneimine). The complexes formed are identified as neutral species, where the ligands are coordinated through N and O donor atoms. The formulae obtained for the complexes are: [CoL(H 2 O) 2 ] with octahedral geometry and [NiL] with tetrahedral geometry. Their antifungal activity is evaluated towards human pathogenic fungi including yeasts of the Candida genus, some opportunistic moulds belonging to the Aspergillus, Scedosporium genus and some dermatophytes. The cobalt complexes show a significant growth inhibition of yeasts tested and also to fungi of the genus Scedosporium which is of interest because these fungi are usually poorly susceptible to current antifungal including Amphotericin B and Itraconazole, chosen as reference in this study. The activity data show that the metal complexes are more potent than the parent ligand.

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“…1) have been explored to a lesser extent with main group elements. Main group combinations are limited to compounds of zinc, [16] tin, [17][18][19] aluminum [18,[20][21][22][23] and gallium [23,24]. This is despite the possibility that the presence of an amine rather than an imine functionality in these ligands could give rise to different structural, electronic and catalytic properties of their metal derivatives.…”

Section: Introductionmentioning

confidence: 99%