Some piperidine derivatives of gold(I): crystal and molecular structure of chloro(piperidine)gold(I)

“…[5] (dta=dithio-acetate ) and [Au (pip ) Cl ] 4 [ 6 ] (pip = piperidine ) were prepared according to published procedures. Absorption spectra were measured in solution at room temperature on a Uvikon 860 absorption spectrometer.…”

Section: Methodsmentioning

confidence: 99%

Absorption and emission spectra of tetrameric gold(I) complexes

Vogler

Kunkely

1988

Chemical Physics Letters

104

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“…Dabei konnten wir neben den bekannten Zusammensetzungen LAuCl (kovalente Moleküle, z. B. L = Piperidin [13] Was die Stöchiometrie der Produkte betrifft, ist es ebenfalls auffällig, dass bis auf eine Ausnahme alle erhaltenen Komplexe die ungeladene molekulare Form L-Au-CN aufweisen. Zusammensetzungen wie L 2 Au + CN − sind trotz desÜberschusses an Amin bei den Cyano-Komplexen unwahrscheinlich, da Cyanid zwar als Pseudohalogenid betrachtet werden kann, allerdings in der Gegenwart vonÜbergangsmetallzentren selten ungebunden als einfaches Gegenion auftritt (es gibt im CCDC bei einkernigen Komplexen nur drei Beispiele eines Cyanid-Gegenions [18 -20]).…”

Section: Introductionunclassified

Aminkomplexe des Goldes, Teil 7: Pseudosymmetrie bei Aminkomplexen des Gold(I)-cyanids [1] / Amine Complexes of Gold, Part 7: Pseudosymmetry in Amine Complexes of Gold(I) Cyanide

Döring

Jones

2013

Zeitschrift Für Naturforschung B

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Professor Heinrich Nöth zum 85. Geburtstag gewidmetThe reaction between (tht)AuCl (tht = tetrahydrothiophene) and KCN leads to gold(I) cyanide. This can be treated with liquid amines or azaaromatics L to give crystalline molecular complexes LAuCN, the first complexes of the type (amine)cyanogold(I): L = cyclohexylamine, isobutylamine, isopropylamine, diethylamine, morpholine, piperidine, pyrrolidine, 2,4-lutidine, 3,5-lutidine, and 4-picoline. The cyclohexylamine complex was also obtained as the adduct LAuCN·L and the pyrrolidine complex in the ionic form [L 2 Au] + [Au(CN) 2 ] − . Two polymorphs of the 3,5-lutidine complex were obtained. Ethylenediamine gave the 2 : 1 complex L(AuCN) 2 . Several of the structures were difficult to refine because of pseudosymmetry (e. g. polar axes). The packing diagrams were analyzed in terms of Au-Au contacts and N-H···N hydrogen bonds. As proof of the principle that the method is also suitable for other ligands, the complex with t-butyldiisopropylphosphane was synthesized and structurally characterized.

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“…For a similar recent example with the ligand (dppm)Se, see ref. [3] Here we report the synthesis and structure of gold(I) compounds with cyclohexylamine (1,6,8), benzylamine (2), 3-iodobenzylamine (3), morpholine (4; this was not stable as a chloro complex), pyrrolidine (5), and piperidine (9) as the amine ligands and bis(methanesulfonyl)amide (1, 2, 3, 4, 5), bis(p-chlorobenzenesulfonyl)amide (7), bis(p-iodobenzenesulfonyl)amide (8), and o-benzenedisulfonylamide (ϭ 1,1,3,3-tetraoxo-1,3,2-benzodithiazole; 6) as the anions. The corresponding chloro derivatives of 2 and 3 were highly insoluble and at best microcrystalline, whereas that of 4 was unstable.…”

Section: Introductionmentioning

confidence: 99%