Výsledky vyhledávání - "Shuenn-Shing Chern"

Residues Involved in the Catalysis, Base Specificity, and Cytotoxicity of Ribonuclease from Rana catesbeianaBased upon Mutagenesis and X-ray Crystallography

Autor: Sui-Chi Wang, Imameddin Amiraslanov, You-Di Liao, Ying-Jen Leu, Yen-Chywan Liaw, Ya-Yun Hsiao, Shuenn-Shing Chern

Publikováno v: Journal of Biological Chemistry. 278:7300-7309

The Rana catesbeiana (bullfrog) ribonucleases, which belong to the RNase A superfamily, exert cytotoxicity toward tumor cells. RC-RNase, the most active among frog ribonucleases, has a unique base preference for pyrimidine-guanine rather than pyrimid

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ff1622264938629d7fb2598af8f9f58b
https://doi.org/10.1074/jbc.m206701200

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Preparation and structures of complexes of titanium(IV) and 8-hydroxyquinoline: TiQ2(Opri)2 and [TiQ2(μ-O)]4·6H2O

Autor: Yen S. Chen, Shuenn Shing Chern, Wen Fong Zeng, Michael Y. Chiang, Cheu Pyeng Cheng

Publikováno v: Polyhedron. 21:1081-1087

The reaction between Ti(OPri)4 and 8-hydroxyquinoline (HQ) resulted in TiQ2(OPri)2, 1 in 90% yield. Further reaction of 1 with water yielded [TiQ2(μ-O)]4·nH2O, 2·nH2O, n=2 or 6 depending on whether the sample was dried. The structures of 1 and 2·

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8283f343c4680151f18b2c4e79f674c7
https://doi.org/10.1016/s0277-5387(02)00873-2

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Syntheses, Structures and Spectroscopic Studies of Quadruply Bonded Complexes Containing Bridging Acetate and η3-etp Ligands (etp = Ph2PCH2CH2P(Ph)CH2CH2PPh2)

Autor: Shih-Fu Chiang, Maw-Cherng Suen, Shuenn-Shing Chern, Chwan-Deng Hsiao, Jhy-Der Chen

Publikováno v: Journal of the Chinese Chemical Society. 45:263-268

The quadruply bonded complexes containing bridging acetate and polydentate phosphine ligands of the type Mo2(O2CCR3)XJ(η3-etp) (R = H, X = Br, 1; R = F, X = CI, 2; R = F, X = Br, 3; etp = Ph2PCH2CH2P(Ph)CH2CH2PPh2) were prepared by reactions of Mo2(

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::134ecb368a9817d7d69a0d3ac178497e
https://doi.org/10.1002/jccs.199800042

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Bis-pocket porphyrins without meso-substituents: Tetramethyltetra(2,4,6-triisopropylphenyl)porphyrin I and tetramethyltetraterphenylporphyrin I

Autor: Shie-Ming Peng, Chi K. Chang, Shuenn-Shing Chern, Nilkamal Bag

Publikováno v: Tetrahedron Letters. 36:6409-6412

A facile synthesis of meso-unsubstituted but doubly fenced porphyrins is described. The required pyrroles are made by the Barton-Zard method from 2,4,6-triisopropylbenzal-dehyde and 2,6-diphenylbenzaldehyde. An X-ray structure confirms the type I pat

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::12f725301e9f71b104b8d8a47ba1954a
https://doi.org/10.1016/0040-4039(95)01326-d

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ChemInform Abstract: Synthesis and Structure of N,N′-Bridged Porphycene

Autor: Shie-Ming Peng, Chi K. Chang, Irene Morrison, Weishi Wu, Shuenn-Shing Chern

Publikováno v: ChemInform. 26

Porphycene, a structural isomer of porphyrin, reacts with the Vilsmeier reagent (DMF–POCl3) to give a one-carbon bridge between two pyrrolic nitrogens; this new structure is characterized by NMR and X-ray crystallography.

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https://doi.org/10.1002/chin.199541159

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Eclipsed cofacial dimers of metal complexes containing d7–d7and d8–d8metal bonds. Crystal structure of bis[bis{(phenanthrene-9,10-diamin)ylato}cobalt(II)] and bis[{(2,3-dicyanoethenediamin)ylato}dicarbonylrhodium(I)]

Autor: Shuenn-Shing Chern, Ming-Chi Liaw, Shie-Ming Peng

Publikováno v: J. Chem. Soc., Chem. Commun.. :359-361

Two novel crystal structures containing the eclipsed conformation of diaminylato type ligands and metal–metal bonds are described; bis[bis{(phenanthrene-9,10-diamin)ylato}cobalt(II)] contains a CoII–CoII bond [2.689(1)A] and two δ bonds between

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2321259079d5f6996f826d7417c6f303
https://doi.org/10.1039/c39930000359

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