Mercurimetrische Mikrobestimmung von Hydrochloriden, Hydrobromiden und Jodmethylaten organischer Basen im Dezimilligrammbereich

Dirscherl, A.; Erne, F.

doi:10.1007/bf01217470

Cited by 7 publications

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“…Cl and S analyses were carried out according to Schöniger. [38] Chlorine and sulphur were determined as described by Dirscherl and Erne [39] Brunisholz and Michot, [40] and Wagner, [41] respectively. Copper and platinum were quantitatively analyzed with a Varian AA20 spectrometer.…”

Section: Resultsmentioning

confidence: 99%

Inclusion of Copper(I) into a Novel Bipyridine-Containing Tetraphosphadiplatinacyclophane

Lindner

Veigel

Ortner

et al. 2000

Eur. J. Inorg. Chem.

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The 5,5′‐bis(hydroxyalkyl)‐2,2′‐bipyridines 4a–c (Scheme 1) were prepared either in one step (4b, 4c) or in four steps (4a) starting with 5,5′‐dimethyl‐2,2′‐bipyridine in each case. Reaction of 4a–c with mesyl chloride afforded the bis(mesylates) [–C5H3N–(CH2)n–CH2–OSO2Me]2 5a–c [n = 1 (a), 2 (b), 3 (c)], which could easily be transformed into the diphosphanes 6a–c by reaction with LiPPh2. Treatment of 6c, 6b with Cl2Pt(NCPh)2 and (RC6H4)2Pt(COD) according to the high‐dilution method resulted in the formation of the tetraphosphadiplatinacyclophanes [–C5H3N–(CH2)4–PPh2PtCl2PPh2–(CH2)4–C5H3N–]2 (7c) and [–C5H3N–(CH2)3–PPh2Pt(C6H4R)2PPh2–(CH2)3–C5H3N–]2 (8b, 9b) (8b: R = H, 9b: R = tBu), respectively (Scheme 2). The molecular structures of 8b and 9b were elucidated by X‐ray structural analyses. The noncoordinated bipyridine moieties in 8b were employed to encapsulate copper(I) to give the host/guest complex 10b (Scheme 3), which was investigated by FAB‐MS, NMR spectroscopy, and cyclovoltammetry. 10b exhibited a quasi‐reversible oxidation at E1/2 = –0.31 V and an electrodeposition‐redissolution redox system at E1/2 = –0.79 V, owing to the formation of copper at the surface of the working electrode.

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Section: Resultsmentioning

confidence: 99%