Metal- and Ligand-Directed One-Pot Syntheses, Crystal Structures, and Properties of Novel Oxo-Centered Tetra- and Hexametallic Clusters Chelate Complexes, Part 22; for Part 21 see reference 12.

Saalfrank, Rolf W.; Reimann, Uwe; Göritz, Mareike; Hampel, Frank; Scheurer, Andreas; Heinemann, Frank W.; Büschel, Michael; Daub, Jörg; Schünemann, Volker; Trautwein, Alfred X.

doi:10.1002/1521-3765(20020816)8:16<3614::aid-chem3614>3.0.co;2-3

Cited by 36 publications

(13 citation statements)

References 10 publications

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“…Nominal compositions could be derived from the elemental analysis and residual mass of the thermogravimetric measurements (Figure 1). Based on these analytical and spectroscopic data, the structures of the new compounds were assigned to be like those of frequently found and well established tri‐ and tetranuclear zinc complexes 13–16…”

Section: Resultsmentioning

confidence: 87%

Dimethylmalonato Zinc Complexes as Molecular Precursors for Electronic Grade Zinc Oxide: Towards a Systematic Ligand Design by Understanding Molecular Decomposition Mechanisms

Hoffmann

Schneider

2014

Eur J Inorg Chem

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Zinc complexes with dimethyl 2-hydroxyimino-and 2-nitromalonate (dmm-NOH and Hdmm-NO 2 , respectively) were synthesized and examined as potential precursors for nanocrystalline zinc oxide. The functionalised 1,3-diketones are sufficiently acidic to allow direct synthesis from hydrozincite or zinc 2-propoxide as well as their full spectroscopic and analytical characterization. Their nominal elemental compositions of [Zn 4 O(dmm-NO) 6 ] and [Zn 3 (OH) 4 (dmm-NO 2 ) 2 ] suggest the presence of multinuclear cage structures with oxo-or hydroxo-bridging ligands. This assumption is in ac-

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Section: Resultsmentioning

confidence: 87%

Dimethylmalonato Zinc Complexes as Molecular Precursors for Electronic Grade Zinc Oxide: Towards a Systematic Ligand Design by Understanding Molecular Decomposition Mechanisms

Hoffmann

Schneider

2014

Eur J Inorg Chem

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“…4 Moderate oxidation state, transition-metal clusters are in general an order of magnitude smaller than the species just mentioned. However, this picture has been changing especially after the synthesis of complex [Mn III 84 O 72 (OMe) 24 (OH) 6 (O 2 CMe) 78 (MeOH) 12 (H 2 O) 42 ] (1) (Fig. 1), which has a 4 nm-diameter torus structure representing the long-sought-after meeting of the bottom-up and top-down approaches to nanoscale magnetic materials, 5a and the very recent isolation of the four-cell, nesting doll-like heterometallic cluster cation [Gd III 54 Ni II 54 (OH) 144 (CO 3 ) 6 (ida) 48 (H 2 O) 25 ] 18+ (2), 5b where ida is the iminodiacetate(-2) ligand.…”

Section: Spyros P Perlepes Was Appointedmentioning

confidence: 99%

Diol-type ligands as central ‘players’ in the chemistry of high-spin molecules and single-molecule magnets

2008

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The combination of diol-type ligands with paramagnetic transition metal ions has led to the isolation of a host of new homometallic and heterometallic clusters, high-spin molecules and single molecule magnets ranging in nuclearity from two to forty four and with spin ground states as large as S = 61/2. The ligands, whose cluster coordination chemistry is discussed in this article, are 1,3-propanediol and its derivatives, diethanolamine and its derivatives, pyridine-2,6-dimethanol and the gem-diol form of di-2-pyridyl ketone. The structural diversity of the complexes stems from the ability of the ligands to adopt a variety of bridging coordination modes depending on the positions of the two hydroxyl groups in the molecule, the presence/absence of extra donor groups and on the reaction conditions. Examples of 'true' reactivity chemistry involving clusters of diol-type ligands are also given. The activation of pyridine-2,6-dimethanol and di-2-pyridyl ketone by 3d-metal centres towards further reactions seems to be an emergent area of synthetic chemistry.

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“…Obwohl die geometrischen Verhältnisse des vierzähnigen N ‐(5‐Methylthiazol‐2‐yl)thiazol‐2‐carboxamidanions in Fragment 38 denen von 37 entsprechen, reagiert es nicht als vierzähniger Ligand, sondern als dreizähniges Rotamer, bei dem nur die drei Stickstoffdonoren koordinieren (Abbildung 22). 26a Die Reaktion von HL mit Zink(II)‐acetat liefert [Zn 4 O(L) 4 (OAc) 2 ] ( 39 ) (Schema ). NMR‐spektroskopische Studien von diamagnetischem 39 zeigen, dass alle vier Liganden chemisch identisch sind.…”

Section: Das Synthesepotenzial Von Ligandrotameren Und Das Maßschnunclassified

“…In Weiterführung der in Abschnitt 4.3 geschilderten Studien wurde HL aus Schema mit Eisen(II)‐acetat in Fluorbenzol unter aeroben Bedingungen umgesetzt, wobei ein Racemat des μ 3 ‐O 2− ‐zentrierten, gemischtvalenten Komplexes [Fe II Fe III 2 O(L) 3 (OAc) 3 ] ( 40 ) entstand,26b,c während die Reaktion von Eisen(II)‐acetat in Chloroform unter aeroben Bedingungen überraschend ein Racemat des homovalenten Oxo‐verbrückten Dimers [{Fe III 3 O(L) 2 (OAc) 4 } 2 O] ( 41 ) lieferte (Schema ) 26a,b. Bemerkenswert ist, dass das Metall/Ligand/Coligand‐Verhältnis (Fe/(L) − /(OAc) − ) in gemischtvalentem 40 1:1:1, in homovalentem 41 jedoch 3:2:4 beträgt.…”

Section: Das Synthesepotenzial Von Ligandrotameren Und Das Maßschnunclassified

Supramolekulare Koordinationschemie – Synergie von Zufallsentdeckung und rationalem Design

2008

Self Cite

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Supramolekulare Koordinationsverbindungen haben mehrere Vorteile gegenüber ihren organischen Pendants: Sie sind in Eintopf‐Reaktionen in hohen Ausbeuten zugänglich und weisen physikalische Eigenschaften auf, die organischen Molekülen in der Regel fehlen. Darüber hinaus ermöglichen ihre schwachen, reversiblen nicht‐kovalent bindenden Wechselwirkungen die Behebung von Fehlverknüpfungen durch Selbstreparaturmechanismen. Dieser Aufsatz beschreibt Entwicklungen in der supramolekularen Koordinationschemie, die ausgehend von Zufallsentdeckungen mithilfe rationalen Designs gemacht wurden. Das Auffinden von Parallelen bei der Entstehung verschiedener supramolekularer Architekturen ermöglicht eine Vorhersage von Ergebnissen in ähnlichen Fällen. Die supramolekulare Synthese verläuft in etwa nach Regeln, wie sie das “lead sheet” zur Improvisation in einem kleinen Jazz‐Ensemble vorgibt, und kann daher zu unvorhergesehenen Resultaten führen. Detaillierte Symmetriebetrachtungen haben basierend auf den Grundregeln der Koordinationschemie jüngst die Entwicklung rationaler Strategien für den Aufbau der verschiedensten Nanostrukturen mit geplanter Größe und Gestalt ermöglicht.

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Metal- and Ligand-Directed One-Pot Syntheses, Crystal Structures, and Properties of Novel Oxo-Centered Tetra- and Hexametallic Clusters Chelate Complexes, Part 22; for Part 21 see reference 12.

Cited by 36 publications

References 10 publications

Dimethylmalonato Zinc Complexes as Molecular Precursors for Electronic Grade Zinc Oxide: Towards a Systematic Ligand Design by Understanding Molecular Decomposition Mechanisms

Dimethylmalonato Zinc Complexes as Molecular Precursors for Electronic Grade Zinc Oxide: Towards a Systematic Ligand Design by Understanding Molecular Decomposition Mechanisms

Diol-type ligands as central ‘players’ in the chemistry of high-spin molecules and single-molecule magnets

Supramolekulare Koordinationschemie – Synergie von Zufallsentdeckung und rationalem Design

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