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・ 1,2,4-Butanetriol trinitrate
・ 1,2,4-Triazole
・ 1,2,4-Trichlorobenzene
・ 1,2,4-Trihydroxyanthraquinone
・ 1,2,4-Trimethylbenzene
・ 1,2,4-Trioxane
・ 1,2,6-Trigalloyl glucose
・ 1,2-alpha-L-fucosidase
・ 1,2-alpha-mannosidase
・ 1,2-Benzenedithiol
・ 1,2-Benzoquinone
・ 1,2-Bis(dicyanomethylene)squarate
・ 1,2-Bis(diisopropylphosphino)ethane
・ 1,2-Bis(dimethylarsino)benzene
・ 1,2-Bis(dimethylphosphino)ethane
1,2-Bis(diphenylphosphino)ethane
・ 1,2-Butanediol
・ 1,2-Butylene carbonate
・ 1,2-Cyclohexane dicarboxylic acid diisononyl ester
・ 1,2-dehydroreticulinium reductase (NADPH)
・ 1,2-diacylglycerol 3-glucosyltransferase
・ 1,2-Diaminopropane
・ 1,2-Diazepine
・ 1,2-Dibromo-3-chloropropane
・ 1,2-Dibromoethane
・ 1,2-Dibromopropane
・ 1,2-Dichloro-4-nitrobenzene
・ 1,2-Dichlorobenzene
・ 1,2-Dichloroethane
・ 1,2-Dichloroethane (data page)


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1,2-Bis(diphenylphosphino)ethane : ウィキペディア英語版
1,2-Bis(diphenylphosphino)ethane

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1,2-Bis(diphenylphosphino)ethane (dppe) is a commonly used bidentate ligand in coordination chemistry. Dppe is almost invariably chelating, although there are examples of unidentate (e.g., W(CO)5(dppe)) and of bridging behavior.〔Cotton, F.A.; Wilkinson, G. ''Advanced Inorganic Chemistry: A Comprehensive Text'', 4th ed.; Wiley-Interscience Publications: New York, NY, 1980; p.246. ISBN 0-471-02775-8〕
==Preparation==
The preparation of dppe is conducted via the alkylation of NaPPh2 which is typically prepared from triphenylphosphine (P(C6H5)3) as follows:〔Girolami, G.; Rauchfuss, T.; Angelici, R. ''Synthesis and Technique in Inorganic Chemistry'', 3rd ed.; University Science Books: Sausalito, CA, 1999; pp. 85-92. ISBN 0-935702-48-2〕
:1. P(C6H5)3 + 2 Na → NaP(C6H5)2 + NaC6H5
NaP(C6H5)2, which is readily air-oxidized, is treated with 1,2-dichloroethane (ClCH2CH2Cl) to give dppe:
:2. 2 NaP(C6H5)2 + ClCH2CH2Cl → (C6H5)2PCH2CH2P(C6H5)2 + 2 NaCl

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