The hydrogenphosphate complex of (1,5-cyclooctadiene)iridium(I), {[Bu4N][(1,5-COD)Ir center dot HPO4]}(n): Synthesis, spectroscopic characterization, and ES-MS of a new, preferred precursor to HPO42- and Bu4N+ stabilized Ir(0)(n) nanoclusters

Date

2004-02-09

Author

Özkar, Saim

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

66
views

0
downloads

The synthesis and characterization of a previously unknown, rare organometallic-phosphate complex, {[Bu4N][(1,5-COD)Ir.HPO4]}(n) (1), is described. Characterization of 1 was accomplished by elemental analysis, electrospray mass spectrometry (ES-MS), and H-1 and C-13 NMR which established the symmetry of the product as at least C-2 or C-5. The ES-MS reveals an interesting, Ir(I) to Ir(III) oxidative process with intense peaks displaying the Ir-191/Ir-193 isotopic distribution patterns expected for the fragments [(1,5-COD)Ir-III(HPO4)(2)](-), [(C8H11)(2)(Ir-III)(2)(PO4)(HPO4)(H2O)](-), and [(C8H11)(2)(Ir-III)(2)(PO4)(HPO4)(H2O)(2)](-). These fragments, in turn, provide evidence for a structure with two HPO42- groups attached to a single Ir, for example ring structures (of at least such C-2 or C-5 symmetry) such as {[Bu4N][(1,5-COD)Ir.HPO4]}(2). Complex 1 is significant since it is known to be the preferred, compositionally precise precursor to the prototype example of a recently discovered class of novel, HPO42- and Bu4N+ stabilized nanoclusters, (Bu4N)(2n)(2n+)[Ir(0)(n).(HPO4)(n)](2n-). Such nanoclusters are being extended, via their analogous hydrogenphosphate-organometallic precursors (1,5-COD)M+ (or 2+)/HPO42- (M = Rh(I), Ru(II), Pt(II)) to their corresponding, catalytically active [M(0)(n).(HPO4)(n)](2n-) nanoclusters.

Subject Keywords

Hydro-enphosphate-organometallic complexes, Synthesis and characterization, Electrospray mass spectrometry of organometallics, Discrete precursors to phosphate-stabilized nanocluster catalysts

URI

https://hdl.handle.net/11511/46688

Journal

JOURNAL OF ORGANOMETALLIC CHEMISTRY

DOI

https://doi.org/10.1016/j.jorganchem.2003.10.038

Collections

Department of Chemistry, Article

Suggestions

OpenMETU
Core

A glow in the dark: synthesis and electropolymerization of a novel chemiluminescent terthienyl system Asil Alptekin, Demet; Önal, Ahmet Muhtar (Royal Society of Chemistry (RSC), 2009-01-01) The synthesis and characterization of a unique (electro)-chemiluminescent monomer based on a terthienyl system, and its corresponding polymer which is the first example of an electro-active chemiluminescent polymer bearing a pyridazine appendage, are described.
Stereoselective construction of 2-oxindole fused spirocycle precursors / Karahan, Seda; Tanyeli, Cihangir; Department of Chemistry (2019) Recent literature on the bioactivity of isatin (indoline-2,3-dione) derivatives triggered organic chemists to make use of the unique potential of isatin in asymmetric organocatalytic synthesis. Due to extensive presence of 2-oxindole skeleton, especially spiro-fused cycles, in many natural products, they drew the special interest in the disciplines of medicinal chemistry and agrochemistry. Due to highly reactive prochiral carbonyl group, isatins are potent precursors for the synthesis of 3,3-disubstituted s...
The closo-Pb-10(2-) Zintl ion in the [Ni@Pb-10](2-) cluster Nalbant Esentürk, Emren; Eichhorn, B (Royal Society of Chemistry (RSC), 2005-01-01) The cluster [Ni@Pb-10](2-), prepared from Pb-9(4-) and Ni(COD)(2), contains a new Zintl ion subunit, closo-Pb-10(2-), centered by a Ni atom.
The semileptonic B to K-1(1270,1400) decays in QCD sum rules Dag, H.; Özpineci, Altuğ; Zeyrek, Mehmet Tevfik (IOP Publishing, 2011-01-01) We analyze the semileptonic rare decays of the B meson to K-1(1270) and K-1(1400) axial vector mesons. The B -> K-1(1270, 1400)l(+)l(-) decays are significant flavor-changing neutral current decays of the B meson. These decays are sensitive to the new physics beyond the standard model (SM), since these processes are forbidden at tree level at SM. These decays occurring at the quark level via b -> sl(+)l(-) transition also provide new opportunities for calculating the CKM matrix elements V-bt and V-ts. In th...
The moduli of surfaces admitting genus two fibrations over elliptic curves Karadoğan, Gülay; Önsiper, Mustafa Hurşit; Department of Mathematics (2005) In this thesis, we study the structure, deformations and the moduli spaces of complex projective surfaces admitting genus two fibrations over elliptic curves. We observe that, a surface admitting a smooth fibration as above is elliptic and we employ results on the moduli of polarized elliptic surfaces, to construct moduli spaces of these smooth fibrations. In the case of nonsmooth fibrations, we relate the moduli spaces to the Hurwitz schemes H(1,X(d),n) of morphisms of degree n from elliptic curves to the ...

Citation Formats

S. Özkar, “The hydrogenphosphate complex of (1,5-cyclooctadiene)iridium(I), {[Bu4N][(1,5-COD)Ir center dot HPO4]}(n): Synthesis, spectroscopic characterization, and ES-MS of a new, preferred precursor to HPO42- and Bu4N+ stabilized Ir(0)(n) nanoclusters,” JOURNAL OF ORGANOMETALLIC CHEMISTRY, pp. 493–501, 2004, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/46688.