Supramolecular Organometallic Chemistry

Haiduc, Ionel; Edelmann, Frank T.

doi:10.1002/9783527613540

Cited by 207 publications

(135 citation statements)

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“…It is worthwhile to note that the reverse addition of the gallium reagent to the solution of the gold starting material resulted in isolation of the cluster [Au 6 (PPh 3 ) 6 [47]. (7) and Au(1)-Ga(2) 2.4125(7) Å in 17; Au(1)-Ga (1) 2.393 and Au(1)-Ga(2) 2.391 Å in 19, respectively] are slightly longer than those observed for the equatorial GaCp Ã units in the cluster complex Au 3 (GaI 2 ) 3 (Cp Ã Ga) 5 15. The coordination of the Ga(DDP) unit to gold resulted in an increased electrophilicity of the gallium atom, a behavior supported by the weak coordination of THF to each of the gallium centers in the cation of 19 [47].…”

Section: Gold-gallium Compoundsmentioning

confidence: 82%

“…The gold cluster complex, Au 3 (GaI 2 ) 3 (Cp Ã Ga) 5 15, in which the gold atoms are bonded only to an electropositive main-group metal, was recently reported to be obtained as an air-sensitive orange-yellow solid by adding Au(PPh 3 )X (X ¼ Cl, I) to a solution of [Cp Ã Ga/GaI] in CH 2 Cl 2 , along with [Au(PPh 3 ) n ] þ (n ¼ 2, 3) species (as suggested by spectroscopic data). It is worthwhile to note that the reverse addition of the gallium reagent to the solution of the gold starting material resulted in isolation of the cluster [Au 6 (PPh 3 ) 6 [47].…”

Section: Gold-gallium Compoundsmentioning

confidence: 99%

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Gold–Heterometal Interactions and Bonds

Silvestru

2008

Modern Supramolecular Gold Chemistry

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Section: Gold-gallium Compoundsmentioning

confidence: 82%

Section: Gold-gallium Compoundsmentioning

confidence: 99%

Gold–Heterometal Interactions and Bonds

Silvestru

2008

Modern Supramolecular Gold Chemistry

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“…Alkylation causes an anodic shift of the redox potential of the ferrocene nucleus, which is linearly dependent on the number of alkyl groups introduced. Octamethyl-1,1Ј-di(2-thiophenyl)ferrocene (2) has also been synthesized and structurally characterized by X-ray diffraction. Cyclic voltammetry has revealed that, in contrast to 1, 2 does not respond to the divalent metal ions studied.…”

Section: Introductionmentioning

confidence: 99%

“…It may also act as a bridging ligand, binding two metal centres [6b]. We have now undertaken a more detailed investigation of the coordination behaviour of this compound towards a range of physiologically active uni-and di-valent metal ions and have also compared the behaviour of 1 with that of the hitherto unknown octamethyl-1,1Ј-di(2-thiophenyl)ferrocene (2).…”

Section: Introductionmentioning

confidence: 99%

Octamethyl-1, 1′-di(2-pyridyl)ferrocene: A Redox-Active Ligand with a Pronounced Selectivity for Divalent Metal Ions

Siemeling

Neumann

Stammler

et al. 2002

Z. anorg. allg. Chem.

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Octamethyl-1,1Ј-di(2-pyridyl)ferrocene (1) acts as molecular electrochemical sensor for magnesium, calcium, zinc, and cadmium ions in acetonitrile solution. The new redox peak, anodically shifted by ca. 0.40 V, which appears in the cyclic voltammogram of 1 in the presence of even small amounts (10 mol %) of these ions, is unaffected by an excess of alkali metal ions. Metal complexation is accompanied by a batho-and hyper-chromic shift of the band in the visible region of the UV-Vis spectrum of 1. A detailed study of the behaviour of 1 towards zinc chloride in acetonitrile solution has revealed that 1 is able to accommodate a maximum of two zinc ions. Oxidation of zinc-coordinated 1 leads to partial decomplexation. The N-methyl and N-benzyl species 1Me ϩ , 1Me 2 2ϩ , Octamethyl-1,1Ј-di(2-pyridyl)ferrocen: Ein redoxaktiver Ligand mit ausgeprägter Selektivität für zweiwertige MetallionenInhaltsübersicht. Octamethyl-1,1Ј-di(2-pyridyl)ferrocen (1) ist ein molekularer elektrochemischer Sensor für Magnesium-, Calcium-, Zink-und Cadmiumionen in Acetonitril-Lösung. Das neue, um ca. 0.40 V anodisch verschobene Redoxsignal, das in Gegenwart selbst kleiner Mengen (10 Mol %) dieser Ionen im Cyclovoltammogramm von 1 erscheint, bleibt durch Alkalimetallionen im Überschuß unbeeinflußt. Die Metallkomplexierung wird von einer batho-und hyperchromen Verschiebung der Bande im sichtbaren Bereich des UV-Vis-Spektrums von 1 begleitet. Eine detaillierte Untersuchung des Verhaltens von 1 gegenüber Zinkchlorid in Acetonitril-Lösung ergab, daß 1 maximal zwei Zinkionen aufnehmen kann. Die Oxida-

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“…Unla È ngst erschienene zusammenfassende Arbeiten enthalten eine Reihe von weiteren Beispielen aus der supramolekularen Ûbergangsmetallorganochemie [22,23].…”

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Platin(0)‐Komplexe mit amino‐substituierten Alkinen: Neue Metallorganische Bausteine für supramolekulare Architekturen und „Kristall‐Engineering”︁

Walther¹,

Heubach²,

Böttcher³

et al. 2002

Z. anorg. allg. Chem.

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Professor Lothar Beyer zum 65. Geburtstag gewidmet Inhaltsu È bersicht. Homoleptische Bis(alkin)platin(0)-Verbindungen mit NH 2 -bzw. NH 2 -und OH-Substituenten sind durch Reaktion von Pt(cod) 2 mit Alkinen als stabile Verbindungen herstellbar und als variable Bausteine fu È r supramolekulare Verba È nde verwendbar. Die Kristallstrukturanalysen von Bis(2-Amino-2,5-dimethyl-5-hydroxy-hex-3-in)platin (0) (1) und von Bis(1-(3-Amino-3-methyl-but-1-inyl)-cyclohexan-1-ol)platin(0) (2) zeigen, dass Pt 0 tetraedrisch von den vier sphybridisierten Kohlenstoffatomen der Alkine umgeben ist. Trotz gleicher Bindungsla Èngen und -winkel der PtC 4 -Tetraeder ist die supramolekulare Verknu È pfung verschieden. Wa Èh-rend in 1 polymere Stra Ènge gebildet werden, in denen die Bis(alkin)-Platin(0)-Einheiten durch (OH) 2 (NH 2 ) 2 -Tetraeder verknu È pft sind, bildet 2 nur ein Dimer, das u È ber ein H-Bru È -ckennetzwerk von vier OH-und zwei NH 2 -Gruppen verbunden ist.Auch Alkin-Platin(0)-Komplexe mit kationischen Alkinliganden, die Ammoniumsubstituenten an den Alkinen enthalten, sind als thermisch stabile Verbindungen isolierbar. Die Kristallstrukturanalyse von [Cl(FH + )Pt(cod)] 4 (8) weist aus, dass vier molekulare Einheiten einen Kubus bilden, mit je vier NH 3 + -Gruppen und Cl ± an den Ecken, die durch Wasserstoffbru È cken zusammengehalten werden. Im Bis-(alkin)Platin(0)-Komplex [Cl 1,5 (FH + ) 1,5 (F) 0,5 Pt] (9) sind nur 1,5 von zwei NH 2 -Gruppen protoniert, und ein Netzwerk von Wasserstoffbru È cken verknu È pft vier Bis(alkin)Platin(0)-Einheiten miteinander. (cod: cycloocta-1,5-dien, F: 1-(Trimethylsilylethinyl)-1-amino-cyclohexan). Platinum(0) Complexes with Amino-Substituted Alkynes: Novel Organometallic Building Blocks for Supramolecular Architectures and ªCrystal EngineeringºAbstract. Homoleptic Bis(alkyne)platinum(0) compounds containing either NH 2 -or NH 2 -/OH-substituents are formed by reaction of Pt(cod) 2 with alkynes as stable compounds. They can be used as variable building blocks for supramolecular networks. The crystal structure analyses of Bis(2-amino-2,5-dimethyl-5-hydroxy-hex-3-yne)platinum(0) (1) and of Bis(1-(3-amino-3-methyl-but-1-inyl)-cyclohexane-1-ol)platinum(0) (2) exhibit that the low-valent Pt atom is tetrahedrally surrounded by the four sp-hybridizated carbonatoms of the alkynes. Despite the fact that the bond lengths and -angles of the PtC 4 units are equal, the supramolecular structures are different. While in 1 polymer strands are formed in which the bis-(alkyne)-Pt 0 units are connected by (OH) 2 (NH 2 ) 2 -tetrahedrons, 2 yields only a dimer containing a network of four OHand two NH 2 -groups.Platinum(0) complexes with cationic alkynes bearing ammonium substituents can be isolated as thermal stable compounds. The X-ray structures of [Cl(FH + )Pt(cod)] 4 (8) reveals that four molecular units form a cube with both four NH 3 + groups and Cl ± at the corners connected by hydrogen bridges. In the bis(alkyne)Pt 0 complex [Cl 1.5 (FH + ) 1.5 (F) 0.5 Pt] (9) only 1,33 of two NH 2 groups are proto...

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Supramolecular Organometallic Chemistry

Cited by 207 publications

References 0 publications

Gold–Heterometal Interactions and Bonds

Gold–Heterometal Interactions and Bonds

Octamethyl-1, 1′-di(2-pyridyl)ferrocene: A Redox-Active Ligand with a Pronounced Selectivity for Divalent Metal Ions

Platin(0)‐Komplexe mit amino‐substituierten Alkinen: Neue Metallorganische Bausteine für supramolekulare Architekturen und „Kristall‐Engineering”︁

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