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1.
図書 |
von Gerhard Timpe
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2.
図書 |
hrsg. von Karl-Heinz Fingerhut, Eduard Haueis und Otfried Hoppe
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3.
図書 |
Алексей Каплер
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4.
論文 |
Ihara, Yoshinori ; Tsuchiya, Ryokichi
概要:
The following ten nickel(II) complexes with meso- or dl-1,2-diphenyl-1,2-ethanediamine (abbreviated as meso-stien and dl-stien, respectively) were prepared, and their thermal behavior was investigated in the
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solid phase: [Ni(meso-stien)2]X2 (X=Cl, Br, I, NO3, or ClO4), [Ni(dl-stien)2]X2 (X=I or ClO4), and [Ni(H2O)2(dl-stien)2]X2 (X=Cl, Br, or NO3). The square planar bis(dl-stien) complex chloride, bromide, and nitrate obtained by thermal dehydration of their respective octahedral diaqua complexes were found by various techniques to be transformed, upon further heating, to the octahedral diacido bis(dl-stien) complexes. The complexes containing dl-stien have a stronger tendency to show such structural transformations than those containing meso-stien. The reason for this difference is discussed.
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5.
図書 |
translated from the original Sanskrit with introduction and notes by Kamaleswar Bhattacharya ; text critically edited by E.H. Johnston and Arnold Kunst
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6.
図書 |
translations and studies by Chr. Lindtner
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7.
図書 |
Nāgārjuna ; introduction, Sanskrit text, English translation, and annotation, David J. Kalupahana
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8.
図書 |
edited by C. Robert Helms and Bruce E. Deal
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9.
論文 |
Yoshimura, Osamu ; Ueda, Kazumasa ; Yamamoto, Yoshikazu
概要:
2-(2-Thiazolylazo)-4-methoxyphenol (TAMP) forms a brownish 2:1 complex with iron(ll) in the presence of ascorbic acid; t
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he complex has a characteristic absorption at 784 nm in chloroform. By utilizing this peculiar absorption, selective spectrophotometry determination of iron has been developed. The optimum pH for iron extraction lies between 5.0-9.3 and Beer's law holds up to 5.0 ng/ml of iron. Many type of ions are tolerable. The method was successfully applied to the determination of iron in river waters. The extraction constant of iron(ll) complex was log Kex=-2.50±0.12 and the extraction mechanism was kinetically investigated. The complexation rate was first-order with respect to iron(ll) and TAMP concentrations and independent of ascorbic acid concentration. From these results, the major extraction rate-determining step was concluded to be a 1:1 complexation reaction between iron(ll) and dissociated TAMP. Kinetic data and activation parameters for the first-order reaction were determined and discussed. © 1988, The Japan Society for Analytical Chemistry. All rights reserved.
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10.
視聴覚資料 |
Franz Schubert
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