Anionic Phosphane − A New Ligand with a Phosphane and a Weakly Coordinating Heteroborate Moiety

Ronig, Benno; Schulze, Herbert; Pantenburg, Ingo; Wesemann, Lars

doi:10.1002/ejic.200400636

Cited by 9 publications

(3 citation statements)

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“…Zwitterionic metal complexes can be prepared following different strategies, the most common being as follows: (a) by reaction of zwitterionic ligands with metal species (this is also the case of the compounds presented in this paper); (b) by generating the charge separation upon coordination; and (c) by association of a positive (or negative) metal center with an oppositely charged ligand maintaining the charge separation …”

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confidence: 99%

Zwitterionic Metalates of Group 11 Elements and Their Use as Metalloligands for the Assembly of Multizwitterionic Clusters

et al. 2005

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Reaction of RNHC(S)PPh2NPPh2C(S)NR (HRSNS; R = Me, Et) with M(I) (M = Cu, Ag, Au) salts afforded zwitterionic complexes of the general formula [M(RSNS)] (M = Cu, Ag, Au). The ligand was found in the solid state in S,S-kappa2 and S,N,S-kappa3 coordination fashions. [Cu(RSNS)] and [Ag(RSNS)] can be used as metalloligand building blocks for the assembly of pentanuclear multizwitterionic Cu5, Cu3Ag2 and Ag5 core clusters of the general formula [M'2{M(RSNS)}3]2+ (M = Cu, M' = Cu, Ag; M = M' = Ag) upon reaction with suitable M' salts. The crystal structures of the most significant compounds are reported herein. Compound [Ag2{Ag(RSNS)}2(OTf)2] was also isolated and structurally characterized, representing a model for the intermediate species of the aforementioned assembly.

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Section: Introductionmentioning

confidence: 99%

Zwitterionic Metalates of Group 11 Elements and Their Use as Metalloligands for the Assembly of Multizwitterionic Clusters

et al. 2005

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“…This dianion, in turn, is available in two steps from Na [BH 4 ] in good yield and reasonable preparative scale (62%, ∼ 5 g). The coordination chemistry of [SnB 11 H 11 ] 2− has recently been elegantly explored by Wesemann [13][14][15][16] and this has centered around the interaction of the exo-lone pair on the cluster tin atom with metal centers. However, there are no reports of the use of monoanionic [1-R-closo-SnB 11 H 11 ] − as potential weakly coordinating anion with transition metal fragments, although the potential to use such anions has been recognized [16] and as such they have been recently used to prepare ionic-liquids when partnered with imidazolium cations [17].…”

Section: Introductionmentioning

confidence: 99%

“…The coordination chemistry of [SnB 11 H 11 ] 2− has recently been elegantly explored by Wesemann [13][14][15][16] and this has centered around the interaction of the exo-lone pair on the cluster tin atom with metal centers. However, there are no reports of the use of monoanionic [1-R-closo-SnB 11 H 11 ] − as potential weakly coordinating anion with transition metal fragments, although the potential to use such anions has been recognized [16] and as such they have been recently used to prepare ionic-liquids when partnered with imidazolium cations [17]. This short article reports a preliminary exploration of the transition metal chemistry of [1-R-closo-SnB 11 2 (1-Me-closo-SnB 11 H 11 ) 2 (Scheme 1), the structure of which was confirmed in the solid state by an X-ray diffraction study (Fig.…”

Section: Introductionmentioning

confidence: 99%

[1‐Me‐1‐closo‐SnB₁₁H₁₁]⁻ as a potential weakly coordinating anion: Synthesis of Rh(PPh₃)₂(1‐Me‐closo‐SnB₁₁H₁₁) and comparisons with Rh(PR₃)₂ (1‐H‐closo‐CB₁₁ H₁₁)

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Kociok‐Köhn

et al. 2006

Heteroatom Chemistry

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The closo‐stannaborane salt [Rh(PPh3)2‐(nbd)][1‐Me‐1‐closo‐SnB11H11] reacts with H2 in CH2 Cl2 solution to afford the contact ion‐pair Rh(PPh3)2(1‐Me‐closo‐SnB11H11), which has been characterized in solution and the solid state by X‐ray diffraction. © 2006 Wiley Periodicals, Inc. Heteroatom Chem 17:174–180, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/hc.20218

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Supramolecular Architecture by Secondary Bonds

Olmos

2008

Modern Supramolecular Gold Chemistry

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Since the metal center in gold complexes usually displays acid character, AuÁ Á ÁNM contacts will be more easily formed as the basicity of the non-metal increases. Thus, there are many goldÁ Á Áhalogen weak interactions between cationic gold complexes and halides or anions of which the halogen forms part, but most are individual contacts between ions that do not generate supramolecular structures. For example, about 50% of AuÁ Á ÁCl contacts are isolated cationÁ Á Áanion interactions.Nevertheless, in some cases, cationÁ Á Áanion contacts give rise to extended structures, as in both the colorless and the yellow polymorph of [Au(C:NC 6 H 11 ) 2 ][PF 6 ] [13], where the gold cations aggregate via aurophilic contacts into infinite linear chains, which are further connected through AuÁ Á ÁF contacts to afford two-dimensional 296j 5 Supramolecular Architecture by Secondary Bonds adjacent molecules, 3.695(1) Å, is slightly longer than the sum of the van der Waals radii.Apart from these types of associations observed in certain neutral gold(I) products, one-dimensional polymers can be formed by AuÁ Á ÁCl interactions between ions, which are more often found when the gold(III) anion [AuCl 4 ] À is present, as occurs, for example, in [EMIM][AuCl 4 ] and [BMIM][AuCl 4 ] ([EMIM]þ ¼ 1-ethyl-3methylimidazolium, [BMIM]þ ¼ 1-(n-butyl)-3-methylimidazolium) [17]. Both salts are very similar in the solid state with each ion surrounded by eight counterions in a cubic fashion and containing two crystallographically independent [AuCl 4 ] À anions arranged perpendicularly to one another and connected by AuÁ Á ÁCl contacts. This results in infinite anionic chains of alternating corner-to-face arranged [AuCl 4 ] À units (Figure 5.5), a unique pattern in salts containing purely tetrachloroaurate(III) anions. The interionic AuÁ Á ÁCl distances in the EMIM and BMIM derivatives are 3.356(3) and 3.452(3) Å, respectively, the latter very close to the sum of the van der Waals radii of gold and chlorine (3.41 Å). In the mixed-valent compound [Au(terpy)Cl] 2 [AuCl 2 ] 3 [AuCl 4 ] [18], an infinite chain of gold containing anions and cations is generated through two types of weak interactions: aurophilic contacts, which result in pentanuclear units, and AuÁ Á ÁCl interactions ( Figure 5.6). Three [AuC1 2 ] À anions, arranged in a spiral, bridge two [Au(terpy)C1] 2þ cations through long axial contacts. The remaining axial site of the [Au(terpy)Cl] 2þ cation is occupied by a chlorine atom from a square-planar [AuC1 4 ] À anion at distance of 3.401(4) Å, resulting in a polymeric Á Á ÁCl-Au III -ClÁ Á ÁAu III Á Á ÁAu I Á Á ÁAu I Á Á ÁAu I Á Á ÁAu III Á Á ÁCl-Au III -ClÁ Á Á chain.A more complicated extended structure is present in [Au(HDMG) 2 ][AuCl 4 ] (H 2 DMG¼dimethylglyoxime, HON¼C(Me)C(Me)¼NOH) [19], where onedimensional polymers are formed via interionic AuÁ Á ÁCl contacts of 3.323(4) and Figure 5.5

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Anionic Phosphane − A New Ligand with a Phosphane and a Weakly Coordinating Heteroborate Moiety

Cited by 9 publications

References 29 publications

Zwitterionic Metalates of Group 11 Elements and Their Use as Metalloligands for the Assembly of Multizwitterionic Clusters

Zwitterionic Metalates of Group 11 Elements and Their Use as Metalloligands for the Assembly of Multizwitterionic Clusters

[1‐Me‐1‐closo‐SnB₁₁H₁₁]⁻ as a potential weakly coordinating anion: Synthesis of Rh(PPh₃)₂(1‐Me‐closo‐SnB₁₁H₁₁) and comparisons with Rh(PR₃)₂ (1‐H‐closo‐CB₁₁ H₁₁)

Supramolecular Architecture by Secondary Bonds

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Anionic Phosphane − A New Ligand with a Phosphane and a Weakly Coordinating Heteroborate Moiety

Cited by 9 publications

References 29 publications

Zwitterionic Metalates of Group 11 Elements and Their Use as Metalloligands for the Assembly of Multizwitterionic Clusters

Zwitterionic Metalates of Group 11 Elements and Their Use as Metalloligands for the Assembly of Multizwitterionic Clusters

[1‐Me‐1‐closo‐SnB11H11]− as a potential weakly coordinating anion: Synthesis of Rh(PPh3)2(1‐Me‐closo‐SnB11H11) and comparisons with Rh(PR3)2 (1‐H‐closo‐CB11 H11)

Supramolecular Architecture by Secondary Bonds

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[1‐Me‐1‐closo‐SnB₁₁H₁₁]⁻ as a potential weakly coordinating anion: Synthesis of Rh(PPh₃)₂(1‐Me‐closo‐SnB₁₁H₁₁) and comparisons with Rh(PR₃)₂ (1‐H‐closo‐CB₁₁ H₁₁)