Gold Complexes with Selenium Ligands, IV<sup>(1)</sup> Preparation, Crystal Structures and Reactions of Phosphine(selenourea)gold(I) Complexes

Jones, Peter G.; Thöne, Carsten

doi:10.1002/cber.19911241213

Cited by 67 publications

(32 citation statements)

References 15 publications

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“…In these processes the phosphine ligands seem to act as reducing agents as well as oxygen traps and gold nanoparticles are produced [119]. [121][122][123][124]. The dinuclear sulfur compounds can also be synthesized in higher yield starting from Li 2 S [125].…”

Section: Clustering Of Gold Atoms At One Centermentioning

confidence: 99%

Gold–Gold Interactions

Crespo

2008

Modern Supramolecular Gold Chemistry

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This chapter focuses mainly on closed shell gold(I) atoms which are found to feel attraction among themselves. This attraction is able to modify expected geometries or support one-, two-or three-dimensional arrays and also leads to interesting properties. Closed shell metal cations are expected to repel each other. Nevertheless, an important number of examples containing [d 8 -d 10 -s 2 ] interactions are known. Particularly strong evidence has been accumulated on the attraction between two or more d 10 shells. In the case of gold(I) such attraction between two or more monovalent gold(I) ions in compounds has been observed structurally for a long time. In these situations the gold centers approach each other to a distance of between 2.7 and 3.3 Å. This range includes the distance between gold atoms in gold metal and approaches, or even overlaps with the range of distances found in the few real Au-Au single bonds. Schmidbaur coined the name aurophilic attraction in 1990 and defined it as the unprecedented affinity between gold atoms even with closed-shell electronic configurations and equivalent electrical charges [1]. Since that moment, aurophilicity has become one of the hot topics in gold chemistry, at first with the aim of understanding such interaction, more recently because of the observation that it may play an important role in interesting properties, thus understanding and modulating aurophilic interactions could help to govern these properties, which include the optical behavior. Although different origins are possible for the luminescent emissions of coordination complexes, such as intraligand transitions (ILT), ligand to metal or metal to ligand charge transfer transitions (LMCT, MLCT) and metal centered (MCT) transitions, in many luminescent gold complexes the emissions have been related to the presence of aurophilic interactions.Information about aurophilicity and chemical situations in which it is observed may be found in different works that may be classified as those which analyse closed shell interactions in general [2], those focused on aurophilicity [1,3], and others which analyze the role of these interactions in coordination [4] and organometallic gold Modern Supramolecular Gold Chemistry: Gold-Metal Interactions and Applications. Edited by Antonio Laguna

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Section: Clustering Of Gold Atoms At One Centermentioning

confidence: 99%

Gold–Gold Interactions

Crespo

2008

Modern Supramolecular Gold Chemistry

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“…This could be due to the dimeric nature of the complex [5], the rest of the complexes forming a linear structure thus seeing very little effect [6,7]. As shown by the 31 P-n.m.r.…”

Section: P-nmr Studiesmentioning

confidence: 89%

“…Recent research has suggested that heavy metal toxicity can be reduced if selenium derivatives are employed [4]. Several reports are available about the spectral and structural characterization of (phosphine)gold(I)-selenium complexes [5][6][7], but, in order to understand the biochemical mechanism of gold-selenium drugs, more information about the nature of gold-selenium bond is needed [8]. The present report describes the synthesis and characterization of some gold(I) complexes with Me 3 P and selenones as ligands.…”

Section: Introductionmentioning

confidence: 99%

Complexation of (trimethylphosphine)gold(I) with Selenones

Isab

Ahmad

2006

Transition Met Chem

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Mixed ligand complexes of gold(I) with various selenones and Me 3 P, [Me 3 PAuSe=C<]Cl, have been prepared and characterized by elemental analyses, i.r. and n.m.r. methods. A decrease in the i.r. frequency of the >C=Se mode of selenones upon complexation is indicative of selenone binding to gold(I) via a selenone group. An upfield shift in 13 C-n.m.r. for the >C=Se resonance of selenones and downfield shifts in 31 P-n.m.r. for Me 3 P moiety are consistent with the selenium coordination to gold(I). The steric effect as well as the basicity of Me 3 PAu + plays a significant role in bonding with Se-containing ligands compared to the Et 3 PAu + and Ph 3 PAu + complexes.

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“…Thus it would be expected that DiazSe would form the most stable complex with Ph 3 PAuCl among the thiones. The crystal structure of the [Ph 3 PAAuASeu]Cl complex has been reported in the literature [17]. The compound is linear and two coordinate in the solid state.…”

Section: P-nmr Studiesmentioning

confidence: 98%

Gold(I) complexes with selenones and triphenylphosphine as ligands

Isab

Ahmad²,

Arnold³

2004

Transition Met Chem

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A number of mixed ligand complexes of gold(I) with various selenones and Ph 3 P, [Ph 3 PAuSe@C<]Cl have been prepared and characterized by elemental analyses, i.r. and n.m.r. methods. A decrease in the i.r. frequency of the C@Se mode of selenones upon complexation is indicative of gold(I) binding via a selenone group. An upfield shift in the 13 C-n.m.r. for the C@Se resonance of selenones and downfield shifts in 31 P-n.m.r. for the Ph 3 P moiety are consistent with the selenium coordination to gold(I). Available data in the literature suggest that PAAuASe type complexes are usually linear.

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Gold Complexes with Selenium Ligands, IV⁽¹⁾ Preparation, Crystal Structures and Reactions of Phosphine(selenourea)gold(I) Complexes

Cited by 67 publications

References 15 publications

Gold–Gold Interactions

Gold–Gold Interactions

Complexation of (trimethylphosphine)gold(I) with Selenones

Gold(I) complexes with selenones and triphenylphosphine as ligands

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Gold Complexes with Selenium Ligands, IV(1) Preparation, Crystal Structures and Reactions of Phosphine(selenourea)gold(I) Complexes

Cited by 67 publications

References 15 publications

Gold–Gold Interactions

Gold–Gold Interactions

Complexation of (trimethylphosphine)gold(I) with Selenones

Gold(I) complexes with selenones and triphenylphosphine as ligands

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Product

Resources

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Gold Complexes with Selenium Ligands, IV⁽¹⁾ Preparation, Crystal Structures and Reactions of Phosphine(selenourea)gold(I) Complexes