Browsing by Author "Kuo, Ting-Shen"

Now showing 1 - 7 of 7

An Electron-Rich Molybdenum-Molybdenum Quintuple Bond Spanned by One Lithium Atom
(2012)
Liu, Shin-Cheng
;
Ke, Wei-Lun
;
Yu, Jen-Shiang K.
;
Kuo, Ting-Shen
;
Tsai, Yi-Chou
Journey from Mo-Mo Quadruple Bonds to Quintuple Bonds
(2009-09-09)
Tsai, Yi-Chou
;
Chen, Hong-Zhang
;
Chang, Chie-Chieh
;
Yu, Jen-Shiang K.
;
Lee, Gene-Hsiang
Heating K(4)Mo(2)Cl(8) and 2 equiv of Li[RC(NDipp)(2)] (R = H, Ph; Dipp = 2,6-i-Pr(2)C(6)H(3)) in tetrahydrofuran (THF) at 60 degrees C gives two paddlewheel type quadruply bonded dimolybdenum complexes, Mo(2)(mu-Cl)[Cl(2)Li(OEt(2))][mu-eta(2)-RC(N-2,6-i-Pr(2)C(6)H(3))(2)](2) (R = H (1), Ph (2)). The Mo-Mo bond lengths of 1 and 2 are 2.0875(4) and 2.0756(8) angstrom, respectively, indicating typical Mo-Mo quadruple bonds. Reduction of 1 and 2 by two electrons results in the isolation of their corresponding Mo-Mo quintuple bonded complexes, Mo(2)[mu-eta(2)-RC(N-2,6-i-Pr(2)C(6)H(3))(2)](2) (R = H (3), Ph (4)), and the Mo-Mo bond lengths dramatically decrease to 2.0187(9) angstrom (3) and 2.0157(4) angstrom (4), a consequence of the formation of the second delta bond and representing the shortest metal-metal bonds beyond the first row elements. The Mo-Mo quintuple bonding characters are corroborated by DFT calculations at the level of BP86/def2-TZVP and BP86/def2-TZVPP.
Palladium-Catalyzed Regio- and Stereoselective Hydrosulfonation of Propiolate Esters
(2017-11-01)
Raju, Selvam
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Annamalai, Pratheepkumar
;
Chan, Fu-Wei
;
Tseng, Po-Yen
;
Chen, Po-Yen
An efficient palladium-catalyzed addition reaction of alkyland arylsulfonic acids to propiolate esters to yield alkenyl sulfonates is demonstrated. The formation of alkenyl sulfonates is highly regio- and stereoselective with favorable yields of up to 95%, and two of the alkenyl sulfonates are utilized for a Sonogashira cross-coupling reaction to produce (Z)-1,3-enynoates.
Reactions of Metal-Metal Quintuple Bonds with Alkynes: [2+2+2] and [2+2] Cycloadditions
(2012)
Chen, Hong-Zhang
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Liu, Shih-Cheng
;
Yen, Chun-Hsu
;
Yu, Jen-Shiang K.
;
Shieh, Yun-Jen
Remarkably short metal-metal bonds: A lantern-type quintuply bonded Dichromium(I) complex
(2008)
Tsai, Yi-Chou
;
Hsu, Chia-Wei
;
Yu, Jen-Shiang K.
;
Lee, Gene-Hsiang
;
Wang, Yu
Stepwise Construction of the Cr-Cr Quintuple Bond and Its Destruction upon Axial Coordination
(2012)
Huang, Yu-Lun
;
Lu, Duan-Yen
;
Yu, Hsien-Cheng
;
Yu, Jen-Shiang K.
;
Hsu, Chia-Wei
Theory-Guided Experiments on the Mechanistic Elucidation of the Reduction of Dinuclear Zinc, Manganese, and Cadmium Complexes
(2011)
Lu, Duan-Yen
;
Yu, Jen-Shiang K.
;
Kuo, Ting-Shen
;
Lee, Gene-Hsiang
;
Wang, Yu