A5007843286- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
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- Organometallic Complex Synthesis and Catalysis
- Metal complexes synthesis and properties
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- Synthesis and Properties of Aromatic Compounds
- Catalytic Cross-Coupling Reactions
- Asymmetric Hydrogenation and Catalysis
- N-Heterocyclic Carbenes in Organic and Inorganic Chemistry
- Luminescence and Fluorescent Materials
- Lanthanide and Transition Metal Complexes
- Supramolecular Chemistry and Complexes
- Synthesis and characterization of novel inorganic/organometallic compounds
- Nanocluster Synthesis and Applications
- Molecular Sensors and Ion Detection
- Carbon dioxide utilization in catalysis
- Porphyrin and Phthalocyanine Chemistry
- Metal-Organic Frameworks: Synthesis and Applications
- CO2 Reduction Techniques and Catalysts
- Fullerene Chemistry and Applications
- Molecular Junctions and Nanostructures
- Coordination Chemistry and Organometallics
- Organoboron and organosilicon chemistry
- Axial and Atropisomeric Chirality Synthesis
University of Nevada, Reno
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University of Brescia
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Politecnico di Milano
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University of West Florida
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University of Southern Mississippi
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State University of New York
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City University of Seattle
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXT(.eta.2-C70)Ir(CO)Cl(PPh3)2: the synthesis and structure of an iridium organometallic derivative a higher fullereneAlan L. Balch, Vincent J. Catalano, Joong W. Lee, Marilyn M. Olmstead, Sean R. ParkinCite this: Am. Chem. Soc. 1991, 113, 23, 8953–8955Publication Date (Print):November 1, 1991Publication History Published online1 May 2002Published inissue 1 November...
Reaction of 1,3-bis(2-pyridinylmethyl)-1H-imidazolium tetrafluoroborate, [H(pyCH2)2im]BF4, with silver oxide in dichloromethane readily yields [Ag((pyCH2)2im)2]BF4, 1·BF4. 1·BF4 is converted to the analogous Au(I)-containing species, [Au((pyCH2)2im)2]BF4, 3, by a simple carbene transfer reaction dichloromethane. Further treatment two equivalents AgBF4 produces trimetallic species [AuAg2((pyCH2)2im)2(NCCH3)2](BF4)3, 4, which contains ions each coordinated pyridine moieties on one ligand and...
Reaction of the Au(I) N-heterocyclic carbene (NHC) compound [Au(im(CH2py)2)2]PF6 with 2 equiv [Cu(MeCN)4]PF6 affords tricationic [Au(im(CH2py)2)2(Cu(MeCN)2)2](PF6)3 (1), which exhibits blue luminescence (λmax = 462 nm). 1 either liquid MeOH or vapor [Au(im(CH2py)2)2(Cu(MeOH))2](PF6)3 (2), produces green 520 nm) under UV excitation. The molecular structures 1·2MeCN and 2·2MeOH·2Et2O were determined by single-crystal X-ray diffraction. Compound contains a linearly coordinated [Au(NHC)2]+ core...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAccumulating evidence for the selective reactivity of 6-6 ring fusion fullerene, C60. Preparation and structure (.eta.2-C60)Ir(CO)Cl(PPh3)2.cntdot.5C6H6Alan L. Balch, Vincent J. Catalano, Joong W. LeeCite this: Inorg. Chem. 1991, 30, 21, 3980–3981Publication Date (Print):October 1, 1991Publication History Published online1 May 2002Published inissue 1 October...
A PtCl2-catalyzed 3,3-rearrangement/[3+2]-cycloaddition of propargylic 3-indoleacetates is developed. Besides the efficient formation highly functionalized tetracyclic cyclopentenes, reaction dramatically divergent from that catalyzed by cationic AuI. Moreover, synthetic potential this method demonstrated a succinct synthesis core vindolinine.
Herein we describe the synthesis, structure, and properties of chiral peropyrenes. Using p-terphenyl-2,2″,6,6″-tetrayne derivatives as precursors, peropyrenes were formed after a 4-fold alkyne cyclization reaction promoted by triflic acid. Due to repulsion two aryl substituents within same bay region, peropyrene adopts twisted backbone with an end-to-end twist angle 28° that was unambiguously confirmed X-ray crystallographic analysis. The products absorb emit in green region UV-visible...
Abstract The design of a relatively simple and efficient method to extend the π‐conjugation readily available aromatics in one‐dimension is significant value. In this paper, pyrenes, peropyrenes, teropyrenes were synthesized through double or quadruple benzannulation reaction alkynes promoted by Brønsted acid. This novel does not involve cyclodehydrogenation (oxidative aryl–aryl coupling) arrive at newly incorporated large arene moieties. All target compounds moderate good yields fully...
Reaction of 1,3-bis(2-pyridinylmethyl)-1H-imidazolium salt, [H(pyCH(2))(2)im]X (X = BF(4)(-) or Cl(-)), with silver oxide in acetonitrile readily yields yellow-brown [((pyCH(2))(2)im)(2)Ag]X, 1.BF(4) 1.Cl. The chloride salt crystallizes 3.650 A intermolecular Ag...Ag interactions while shows no short interaction. Addition excess Ag(BF(4)) produces the homoleptic carbene bridged trimetallic species, [(mu-NHC)(3)Ag(3)](BF(4))(3), 2. This species contains very Ag-Ag separations between...
The N-heterocyclic carbene (NHC) precursor, 1-methyl-3-(2-pyridinylmethyl)-1H-imidazolium tetrafluoroborate, [HCH3im(CH2py)]BF4, reacted with AgBF4 in the presence of aqueous NaOH to produce silver complex [Ag(CH3im(CH2py))2]BF4 (1) which was then Au(tht)Cl form corresponding gold(I) complex, [Au(CH3im(CH2py))2]BF4 (2). Complex 2 1 equiv mixed-metal species [AuAg(CH3im(CH2py))2](BF4)2 (3). reaction followed by metathesis NaBF4 produces dimetallic gold [Au2(CH3im(CH2py))2](BF4)2 (4)....
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSupramolecular aggregation of an (.eta.2-C60) iridium complex involving phenyl chelation the fullereneAlan L. Balch, Vincent J. Catalano, Joong W. Lee, and Marilyn M. OlmsteadCite this: Am. Chem. Soc. 1992, 114, 13, 5455–5457Publication Date (Print):June 1, 1992Publication History Published online1 May 2002Published inissue 1 June 1992https://pubs.acs.org/doi/10.1021/ja00039a084https://doi.org/10.1021/ja00039a084research-articleACS...
An N,N-carbonyl-bridged dipyrrinone oxime has been synthesized and studied as a potential sensor for organophosphates. The molecular underwent drastic colorimetric response upon formation of the adduct. pesticide dimethoate was found to produce biggest spectral response, with limit detection equal 4.0 ppm using UV–visible spectroscopy. Minimal fluorescence "turn on" via PET mechanism seen, modeling studies were used explain lower than expected response. X-ray crystal structure fluorescent...
A series of triiron complexes supported by a tris(β-diketiminate)cyclophane (L3–) catalyze the reduction dinitrogen to tris(trimethylsilyl)amine using KC8 and Me3SiCl. Employing Fe3Br3L affords 83 ± 7 equiv NH4+/complex after protonolysis, which is 50% yield, based on reducing equivalents. The compounds tested evidence subtle effects ancillary donors, including halides, hydrides, sulfides, carbonyl ligands, metal oxidation state N(SiMe3)3 highlight Fe3(μ3-N)L as common species in product...
The Au(I) and Ag(I) closed-shell metal dimers of 2-(diphenylphosphino)-1-methylimidazole, dpim, were investigated. dpim formed the discreet binuclear species [Ag2(dpim)2(CH3CN)2](2+) (1) when reacted with appropriate salts. Likewise, [Au2(dpim)2](2+) (3) [AuAg(dpim)3](2+) (4) produced via reactions (tht)AuCl, tht is tetrahydrothiophene, Ag(I). Compound 3 exhibits an intense blue luminescence (lambdamax=483 nm) in solid state. However, upon initial formation 3, a small impurity Cl- was...
Rearrangement of the Ag4 cores luminescent silver(I) bis(diphenylphosphanyl)bipyridine (P2-bpy) complexes shown upon ligation Ag centers (see picture) leads to quenching their emissions. Quenching occurs with O2, CO, NO, and coordinating solvents such as MeCN Me2SO. The reversible emission halide-free complex [Ag4(P2-bpy)2]4+ in solution suggests potential applications a sensor.
Reaction of the imidazolium N-heterocyclic carbene precursor containing a methyl-substituted pyridyl functionality [HCH3im(CH3py)]PF6, 1, with Ag2O produces homoleptic Ag(I) complex, [Ag(CH3im(CH3py))2]PF6, 2. In simple transfer reaction analogous Au(I) species, [Au(CH3im(CH3py))2]PF6, 3, is formed by treatment 2 Au(tht)Cl in dichloromethane. Both and 3 are structurally similar nearly linearly coordinated NHC ligands. The methyl group appended to ring inhibits rotation at room temperature....
A series of picolyl-substituted NHC-bridged triangular complexes Ag(I) and Cu(I) were synthesized upon reaction the corresponding ligand precursors, [Him(CH(2)py)(2)]BF(4) (1a), [Him(CH(2)py-3,4-(OMe)(2))(2)]BF(4) (1b), [Him(CH(2)py-3,5-Me(2)-4-OMe)(2)]BF(4) (1c), [Him(CH(2)py-6-COOMe)(2)]BF(4) (1d), [H(S)im(CH(2)py)(2)]BF(4) (1e), with Ag(2)O Cu(2)O, respectively. Complexes [Cu(3)(im(CH(2)py)(2))(3)](BF(4))(3) (2a), [Cu(3)(im(CH(2)py-3,4-(OMe)(2))(2))(3)](BF(4))(3) (2b),...
The silver(I) species [Ag(benzim(CH2py)2)2]PF6 (1) was prepared by refluxing the ligand precursor [H(benzim(CH2py)2)2]PF6 with Ag2O and aqueous sodium hydroxide in dichloromethane. Simple transmetalation of 1 tetrahydrothiophenegold(I) chloride forms gold(I) analogue [Au(benzim(CH2py)2)2]PF6 (2). addition 2 equiv [Cu(NCCH3)4]PF6 to acetonitrile produces a blue-luminescent, trimetallic complex, [AuCu2(benzim(CH2py)2)2(NCCH3)4](PF6)3·2CH3CN (3·2CH3CN). When blue-luminescent 3·2CH3CN is exposed...
The properties of nanographenes can be tuned by changing their shapes, therefore the development new methods suitable for synthesis various is highly desirable. Described herein an intramolecular InCl3 /AgNTf2 -catalyzed regioselective domino benzannulation reaction buta-1,3-diynes to build irregular nanographenes. Different nanographene compounds were easily obtained in moderate high yields through careful design precursor compounds. This was successfully applied a fourfold alkyne...
A series of Cu4X4(PPh2py)2 compounds (X = Cl (1), Br (2), I (3), PPh2py 2-(diphenylphosphino)pyridine) were prepared and characterized using X-ray crystallography, NMR, UV-vis, luminescence spectroscopy. The copper chloride bromide clusters have Cu4X4 octahedral cores while the iodide contain an unprecedented butterfly shaped core. Crystallization from appropriate solvent produced solvates 2·2CH2Cl2, 2·2CHCl3, 3·0.5CH2Cl2 where presence lattice solvate influences overall structural...
We present the inaugural synthesis of a chiral teropyrene achieved through four-fold alkyne benzannulation catalyzed by InCl
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTSynthesis and Characterization of Trigonal Gold(I) Cage Complexes: Luminescent Metallocryptates Encapsulating Tl(I) Na+ IonsVincent J. Catalano, Byron L. Bennett, Heidi M. Kar, Bruce C. NollView Author Information Department Chemistry, University Nevada Reno, 89557 Chemistry Biochemistry Colorado, Boulder Colorado 80309 Cite this: Am. Chem. Soc. 1999, 121, 43, 10235–10236Publication Date (Web):October 16, 1999Publication History Received14...
The complexes [Ru(trpy)(H(2)dppi)Cl](+) (1a), [Ru(trpy)(Me(2)dppi)Cl](+) (1b), and [Ru(trpy)(Cl(2)dppi)Cl](+) (1c), where trpy is 2,2',2"-terpyridine, H(2)dppi 3,6-bis(pyrid-2-yl)pyridazine, Me(2)dppi 3,6-bis(6-methylpyrid-2-yl)pyridazine, Cl(2)dppi 3,6-bis(6-chloropyrid-2-yl)pyridazine, were synthesized characterized by UV-visible (1)H NMR spectroscopy. Compounds 1a 1b additionally X-ray crystallography. [Ru(trpy)(H(2)dppi)Cl](PF(6)).2CH(3)CN crystallizes in the triclinic space group,...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChelate ring opening and metal ion relocation leading to the formation of a luminescent gold(I)-iridium(I)-gold(I) chain complexAlan L. Balch, Vincent J. Catalano, Marilyn M. OlmsteadCite this: Am. Chem. Soc. 1990, 112, 5, 2010–2011Publication Date (Print):February 1, 1990Publication History Published online1 May 2002Published inissue 1 February 1990https://pubs.acs.org/doi/10.1021/ja00161a062https://doi.org/10.1021/ja00161a062research-articleACS...
The deep-red, air-stable mixed-metal metallocryptands, [AuPdTl(P2phen)3](PF6)2, 1.(PF6)2, and [AuPtTl(P2phen)3](PF6)2, 2.(PF6)2, are easily prepared in good yield (60-70%) by reacting 3 equiv of P2phen with 1 Au(THT)Cl, excess thallous acetate, the appropriate amount either Pd2(dba)3 for or Pt(dba)2 2 acetonitrile where is 2,9-bis(diphenylphosphino)-1,10-phenanthroline, THT tetrahydrothiophene, dba dibenzylidineacetone. Compared to more symmetrical bimetallic these trimetallic species show...