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1
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0001269629
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Struktur und Reaktivität von Lithiumenolaten, vom Pinakolon zur selektivenC-Alkylierung von Peptiden – Schwierigkeiten und Möglichkeiten durch komplexe Strukturen
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(1988)
Angewandte Chemie
, vol.100
, pp. 1685
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Seebach, D.1
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3
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0000051997
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Die aktiven Zentren in manganhaltigen Metalloproteinen und anorganische Modellkomplexe
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(1989)
Angewandte Chemie
, vol.101
, pp. 1179
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Wieghardt, K.1
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5
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84990138172
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We thank Prof. Dr. K. Wieghardt for a preprint of this work
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9
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84990077869
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Formation of the thermodynamically most stable product, having a special structure, under appropriate conditions (concentration, temperature, solvent) from labile, mononuclear metal complexes, multidentate ligands, and bridging ligands [2, 5].
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14
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84990161676
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The use of sodium hydride/metal chloride has so far given ca. 15% lower yields. The multistep process used, for example, in the synthesis of the corresponding zinc chelate complex [3] cannot compete with these one‐pot procedures. In this process, hydrolysis of the magnesium chelate complex 3b initially yields the tetraethyl ester 8b. Reaction of 8b with sodium hydride/zinc bromide proceeds via the free doubly bidentate chelate anion 7b to afford, after workup with aqueous ammonium chloride solution, the “adamantanoid” zinc chelate complex, but only in yields of ca. 66% (based on 3b).
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15
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84990169799
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In addition to 4a,b, 5a,b, and 6a,b, the corresponding complexes with R = tert‐butyl or benzyl were also synthesized. In all cases, beautiful crystalline compounds were obtained, although only the methyl‐substituted derivatives (a series) were suitable for X‐ray analysis.
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16
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84990169811
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w = 0.063; 708 refined parameters. Further details of the crystal structure investigation may be obtained from the Fachinformations‐zentrum Karlsruhe. Gesellschaft für wissenschaftlich‐technische Information mbH. D‐7514 Eggenstein‐Leopoldshafen 2 (FRG), on quoting the depository number CSD‐54193, the names of the authors, and the journal citation.
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17
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84990146141
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Schematic representation.
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18
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84990148108
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The band patterns and characteristics of the IR spectra indicate that compounds 4b, 5b, and 6a, b and the corresponding complexes with R = tert‐butyl or benzyl have the same structures as 4a and 5a.
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19
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0003066333
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Supramolekulare Chemie – Moleküle, Übermoleküle und molekulare Funktionseinheiten (Nobel-Vortrag)
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2⊕ ions), compare the relationships in spherical tricycles (bridgeheads: N atoms)
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(1988)
Angewandte Chemie
, vol.100
, pp. 91
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Lehn, J.M.1
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24
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84990148126
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Phase Transfer Catalysts, Properties and Applications (Merck‐Schuchardt 1987), p. 33
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Weber, E.1
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42
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84982387808
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Intramolekulare Wechselwirkungen zwischen Dreifachbindungen, XV. Kristall- und Molekularstruktur von 9,10,19,20-Tetradehydro-tetrabenzo[a,c]cyclododecen mit Benzol als Addukt
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2796
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(1973)
Chemische Berichte
, vol.106
, pp. 761
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Irngartinger, H.1
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45
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0001389432
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Tetra-tert-butyltetrahedran — Kristall- und Molekülstruktur
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(1984)
Angewandte Chemie
, vol.96
, pp. 967
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Irngartinger, H.1
Goldmann, A.2
Jahn, R.3
Nixdorf, M.4
Rodewald, H.5
Maier, G.6
Malsch, K.‐D.7
Emrich, R.8
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