With Tag: General Chemistry

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A regional scale model for ozone in the United States with subgrid representation of urban and power plant plumes

Steven C Wofsy, Jennifer A Logan, Sanford Sillman
Journal of Geophysical Research | 1990 | 10.1029/JD095iD05p05731



Contrasting Stabilities of Classical and Bridged Pyramidal Si3H3X Molecules (X = BH-, CH, N, NH+, NO, SiH, P, PH+, and PO)

Eluvathingal D. Jemmis, Gantasala Naga Srinivas
J. Am. Chem. Soc. | 1996 | 10.1021/ja9533858

Trigonal-pyramidal Si 3 H 3 X systems have been studied at HF/6-31G*, MP2(FC)/6-31G*, and Becke3LYP/6-31G* levels. The classical trigonal-pyramidal structure (5) is a higher order stationary point for X = BH - , CH, NO, SiH, P, PH + , and PO, whereas it is a...


Catalytic Asymmetric [4 + 1] Cycloaddition of Vinylallenes with Carbon Monoxide:  Reversal of the Induced Chirality by the Choice of Metal

Masahiro Murakami, Yoshihiko Ito, Kenichiro Itami
J. Am. Chem. Soc. | 1999 | 10.1021/ja9839365

Rhodium(I) and platinum(0) complexes having a chiral ligand, 1,2-bis(2,5-dialkylphosphorano)benzene, effected an asymmetric carbonylative [4 + 1] cycloaddition reaction of vinylallenes. Useful levels of asymmetric induction were attained even with substrates...


New Radical Allylation Reaction of Iodides

Béatrice Quiclet-Sire, Stéphanie Seguin, Samir Z. Zard, Frédéric Le Guyader
J. Am. Chem. Soc. | 1997 | 10.1021/ja9708878



Anti-Polarity in Ideal BiMnO3

Pio Baettig, Ram Seshadri, Nicola A. Spaldin
J. Am. Chem. Soc. | 2007 | 10.1021/ja073415u

The structure and properties of the possible multiferroic, BiMnO 3 , are calculated using the LDA+U method of density functional theory. The symmetry is found to be centrosymmetric C2/c with zero ferroelectric polarization. The stereochemically active Bi lone...


Binuclear Homoleptic Nickel Carbonyls:  Incorporation of Ni−Ni Single, Double, and Triple Bonds, Ni2(CO)x (x = 5, 6, 7)

Henry F. Schaefer, Shawn T. Brown, Igor S. Ignatyev, R. Bruce King
J. Am. Chem. Soc. | 2000 | 10.1021/ja9914083

Despite the fact that Ni(CO) 4 was discovered more than a century ago, no neutral Ni 2 (CO) y compound has ever been synthesized in macroscopic amounts. In this study we consider a number of such compounds, including the Ni−Ni single-bonded (μ-CO)Ni 2 (CO) ...


Palladium Complex Catalyzed Acylation of Allylic Esters with Acylsilanes

Yuji Imai, Yasushi Obora, Takashi Kawamura, Yasushi Tsuji, Yasuhiro Ogawa
J. Am. Chem. Soc. | 2001 | 10.1021/ja010674p

Acylation of allylic esters (2) with acylsilanes (1) in the presence of a catalytic amount (5 mol %) of a palladium complex is reported. The reaction proceeds selectively to afford β,γ-unsaturated ketones (3) in high yields. [Pd(η 3 -C 6 H 5 CHCHCH 2 )(CF 3 ...


Migrating Alkynes in Vinylidene Carbenoids:  An Unprecedented Route to Polyynes

Sara Eisler, Rik R. Tykwinski
J. Am. Chem. Soc. | 2000 | 10.1021/ja005557t



Efficiency of a Ruthenium Catalyst in Metathesis Reactions of Sulfur-Containing Compounds

Steven P. Nolan, Gaëlle Spagnol, Marie-Pierre Heck, Charles Mioskowski
Org. Lett. | 2002 | 10.1021/ol025834w

1,3-Dimesitylimidazol-2-ylidene ruthenium benzylidene catalyst (RuCl 2 (C(H)Ph)(PCy 3 )(IMes)) has been successfully employed in ring-closing metathesis reactions of acyclic diene sulfides, disulfides, and dithianes and in self-cross metathesis reactions of...


Free-Radical Variant for the Synthesis of Functionalized 1,5-Diketones

Samir Z. Zard, Sunggak Kim, Kelvin Kau Kiat Goh
Org. Lett. | 2013 | 10.1021/ol402213k

A free-radical approach for the synthesis of functionalized 1,5-diketones has been accomplished through an effective combination play between alkenylacylphosphonates and keto-xanthates as radical surrogates of enolates and enones, respectively.


Practical Asymmetric Henry Reaction Catalyzed by a Chiral Diamine-Cu(OAc)2 Complex

Masahiko Watanabe, Takayoshi Arai, Akira Yanagisawa
Org. Lett. | 2007 | 10.1021/ol7014362

The chiral diamine ligand 3 was designed and synthesized from (R,R)-1,2-diphenylethylenediamine, (S)-2,2‘-dibromomethyl-1,1‘-binaphthalene, and o-xylylene dibromide. The resulting 3-Cu(OAc) 2 complex was a highly efficient catalyst for the Henry reaction,...


A Solid-Phase Route to N-Cyanoamides

Nicholas C. Ray, David M. Parry, Trevor Morgan
Org. Lett. | 2002 | 10.1021/ol0172020

A new method for the solid-phase synthesis of cyanamides is described. The attachment of a secondary amine to solid support is accomplished using Merrifield resin. After functionalization, cleavage is readily achieved with cyanogen bromide to afford the...


Stereoselective Formation of Trisubstituted (Z)-Chloroalkenes Adjacent to a Tertiary Carbon Stereogenic Center by Organocuprate-Mediated Reduction/Alkylation

Shunsuke Seike, Tetsuo Narumi, Haruo Aikawa, Hirokazu Tamamura, Takuya Kobayakawa
Org. Lett. | 2012 | 10.1021/ol301988d

A robust and efficient method for the synthesis of trisubstituted (Z)-chloroalkenes is described. A one-pot reaction of γ,γ-dichloro-α,β-enoyl sultams involving organocuprate-mediated reduction/asymmetric alkylation affords α-chiral (Z)-chloroalkene...


Nickel-Catalyzed Diastereoselective Alkyl–Alkyl Kumada Coupling Reactions

Thomas Di Franco, Alessio Orsino, Peng Ren, Xile Hu, Pablo M. Perez Garcia
Org. Lett. | 2012 | 10.1021/ol302067b

A nickel pincer complex is found to catalyze alkyl–alkyl Kumada coupling reactions of 1,3- and 1,4-substituted cyclohexyl halides and tetrahydropyrans with an excellent diastereoselectivity. The mechanistic investigation of the coupling reactions provides...


Hydrophobic Polymer-Supported Catalyst for Organic Reactions in Water:  Acid-Catalyzed Hydrolysis of Thioesters and Transprotection of Thiols

Shinya Iimura, Shū Kobayashi, Kei Manabe
Org. Lett. | 2002 | 10.1021/ol026906m

A hydrophobic polystyrene-supported sulfonic acid was found to be effective for hydrolysis of thioesters in pure water. It was revealed that the catalyst was much superior to other Brønsted acid catalysts. Transprotection of thiols from thioesters to...


Asymmetric Hydrogenation of Alkenyl, Cyclopropyl, and Aryl Ketones. RuCl2(xylbinap)(1,2-diamine) as a Precatalyst Exhibiting a Wide Scope

Takeshi Ohkuma, Eiji Katayama, Takao Ikariya, Masatoshi Koizumi, Trang Pham, Kunihiko Murata, Henri Doucet, Masami Kozawa, Tohru Yokozawa, Ryoji Noyori
J. Am. Chem. Soc. | 1998 | 10.1021/ja983257u



Opera and Poison: A Secret and Enjoyable Approach To Teaching and Learning Chemistry

João Paulo André
J. Chem. Educ. | 2013 | 10.1021/ed300445b

The storyline of operas, with historical or fictional characters, often include potions and poisons. This has prompted a study of the chemistry behind some operatic plots. The results were originally presented as a lecture given at the University of Minho in...


Aluminum Tris(2,6-diphenylphenoxide)-ArCOCl Complex for Nucleophilic Dearomatic Functionalization

Susumu Saito, Hisashi Yamamoto, Masaaki Murase, Toshihiko Sone
J. Am. Chem. Soc. | 2000 | 10.1021/ja0014382



Fully Intermolecular Nickel-Catalyzed Three-Component Couplings via Internal Redox

Ananda Herath, Wei Li, John Montgomery
J. Am. Chem. Soc. | 2007 | 10.1021/ja0781846

Two distinct nickel-catalyzed fully intermolecular three-component couplings are described. The catalytic addition of enals, alkynes, and alcohols provides γ,δ-unsaturated esters, whereas the catalytic addition of enones, alkynes, and aldehydes provides...


Novel Radical Reaction of Phenylsulfonyl Oxime Ethers. A Free Radical Acylation Approach

Sunggak Kim, Joo-Yong Yoon, Ill Young Lee, Dong Hyun Oh
J. Am. Chem. Soc. | 1996 | 10.1021/ja9600993


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