Synthese und Kristallstruktur von [l,3-Bis(4-ethoxyphenyl)triazenido]pyridino-silber(I), einem dimeren Komplex mit kurzem Silber-Silber-Kontakt / Synthesis and Crystal Structure of [1,3-Bis(4-ethoxyphenyl)triazenido]pyridino Silver(I), a Dimeric Complex with a Short Silver-Silver Contact

Hartmann, Edmund; Strähle, Joachim

doi:10.1515/znb-1988-0506

Cited by 8 publications

(1 citation statement)

References 3 publications

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“…In binuclear complexes of naphthyridine (Munakata, Maekama, Kitegawa, Adachi & Masuda, 1990), 1,2,4-triazole and 2-aminoquinoline (Schmidbaur, Mair, Miiller, Lachmann & Gamper, 1991), unidentate coordination of a nitrate or perchlorate anion to Ag is weak but significant and distorts the primary linear coordination towards trigonal, with a correlation among Ag--N and Ag--O distances and the N--Ag--N angle. In complexes containing two or more silver(I) atoms with a primary linear or almost linear coordination by two N atoms, Ag-..A8 distances have been found ranging upwards from 2.65 A, many of them considerably shorter than that in the present structure and interpreted as direct metal-metal bonding (Beck & Str'~ihle, 1986;Hass & Bergerhoff, 1974;Hartmann & Str'~ihle, 1988, 1990Eastland, Mazid, Russell & Symons, 1980;Fenske, Baum, Zinn & Dehnicke, 1990;Tsuda, Ohba, Takahashi & Ito, 1989;Hartmann, Schmid & Str/ihle, 1989;van Stein, van Koten, Blank, Taylor, Vrieze, Spek, Duisenberg, Schreurs, Kojic Prodic & Brevard, 1985;Cotton, Feng, Matusz & Poli, 1988;Munakata, Maekama, Kitagawa, Adachi & Masuda, 1990).…”

Section: Commentmentioning

confidence: 64%

A binuclear silver complex of a tetrapyrazolyl ligand

Clegg¹,

Cooper²,

Lockhart³

et al. 1994

Acta Crystallogr C

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Section: Commentmentioning

confidence: 64%

A binuclear silver complex of a tetrapyrazolyl ligand

Clegg¹,

Cooper²,

Lockhart³

et al. 1994

Acta Crystallogr C

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Synthesis, Structure, and Magnetic Properties of a 2,2‐Dipyridyl‐2,5‐dihydro‐imidazole‐1‐oxyl‐(L‐)Bridged Disilver Complex [Ag₂L₂](SbF₆)₂: A Four‐Membered Ring from two Ag(I) Ions and two Imine Nitrogen Atoms

Hintermaier¹,

Mihan²,

Gerdan

et al. 1996

Chem. Ber.

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The reaction of 2,5-dihydro-4,5,5-trimethyl-2,2-di-2-pyridyl-ring with two Ag(1) ions and two imine nitrogen atoms of the imidazole-1-oxyl (L) with AgSbFs gives the complex imidazolines with a relatively short Ag-Ag distance [2. 839(2) [Ag2L2]2+[SbF;]2 which was characterized by X-ray diffrac-A]. Magnetic measurements indicate that two nitroxide radition. -The complex (a biradical) forms a four-membered cals are slightly coupled.Complexes with nitroxide radicals are of current interest due to their magnetic properties and the possibility of forming molecular magnetic materials [']. Recently, we reported on the preparation of the new nitroxide radical 2,5-dihydro-4,5,5-trimethyl-2,2-di 2-pyridylimidazole-1-oxyl (L) ['] and of some metal complexes thereof13]. In this paper a silver(1) complex with this ligand is described. Results and DiscussionThe reaction of L with AgSbF6 in methanol gives a complex of the composition Ag(L)SbF6 (1). 1The X-ray structural analysis of 1 shows that two Ag(1) ions form with two imine nitrogen atoms of the imidazolines a four-membered ring with a relatively short Ag-Ag distance of 2.839(2) A. The molecule contains an inversion center. The Ag2N2 ring is planar and perpendicular to the two 3-imidazoline heterocycles. The Ag-N distances within the Ag2N2 ring are 2.50 and 2.65 A. The length of the imine bond P 2 S C 2 : 1.27 A) is not affectcd by coordination and has the same value as found in the free ligand L"], which is typical of C=N bondsL41. Two pyridine nitrogen atoms of each ligand are also coordinated to an Ag (1) The interesting feature of this structure is the four-membered AgZN2 ring. In accordance with the C = N bond length the IR spectrum shows that the C=N group of the imidazoline cycle is a typical imine group; the C = N absorption of 1 is shifted only by 9 cmpl to lower wave numbers in comparison with the free ligand. This means that an ylidic C-N structure is not important, and coordination of the nitrogen atom to both Ag(1) ions occurs only by one electron pair.A similar M2Nz diamond-type structure show Zn(I1) and Cu(1) complexes in which two pyridine N atoms are bridging two di0 metal ions and in which the pyridine ligands have two coordinated imino groups in the position 2 and 6L71. Like 1 these complexes show short M-M distances.MO calculations of multinuclear ligand-bridged Cu(1) complexes by IIoffmann[81 indicate that the attractive Cu-(I)-Cu(1) interaction is caused by s+p+d mixing. Alvarezlgl proposes that the bonding in MzXz diamonds of tetrahedral d'" ions is 4-electron-4-center deficient as in other electron-deficient compounds, e.g. B2H6, and that dlo-dIo interaction occurs.However, ab-initio calculation on Au(I) ['"I and Cu(l)["] clusters by Pykko, Fenske, and Ahlrichs suggest that the Chem.

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1,3‐Bis(4‐fluorphenyl)triazenido‐Komplexe von Kupfer und Silber. Synthese und Kristallstruktur von [Cu(FC₆H₄N₃C₆H₄F)]₄, [Ag(FC₆H₄N₃C₆H₄F)]₄ und [Cu(FC₆H₄N₃C₆H₄F)(OCH₃)]₄

Hartmann

Strähle

1990

Zeitschrift anorg allge chemie

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[Cu(FC6H4N3C6H4F)]4 (1) und [Ag(FC6H4N3C6H4F)]4 (2) entstehen beim Vereinigen einer aus Na und 1,3‐Bis(4‐fluorphenyl)‐triazen frisch bereiteten Lösung des Triazenids in THF mit der äquivalenten Menge CuCl bzw. AgNO3 in CH3CN. 1 kristallisiert monoklin in der Raumgruppe C2/c: a = 2 601,2(7); b = 792,6(6); c = 2 421,9(9) pm; β = 114,19(3)°; Z = 4. 2 ist ebenfalls monoklin mit der Raumgruppe C2/c: a = 1 863,0(3); b = 1 270,2(1); c = 2 005,1(2) pm; β = 103,07(1)°; Z = 4. In beiden tetrameren Komplexen 1 und 2 bilden die vier Metallatome eine planare Raute, deren Kanten abwechselnd oberhalb und unterhalb von den Triazenidoliganden überbrückt werden, so daß sich die Molekülsymmetrie C2 ergibt. Die kurzen Metall–Metall‐Abstände CuCu = 260,70 und 260,98 pm und AgAg = 280,64 und 283,37 pm liegen im Bereich schwach bindender Wechselwirkungen. 1 wird in CH3OH langsam zu [Cu(FC6H4N3C6H4F)(OCH3)]4 (3) oxidiert. Dieses kristallisiert aus CH3OH/THF als triklines Addukt mit 2 THF, Raumgruppe P1: a = 1 267,4(1); b = 1 392,6(2); c = 904,8(2) pm; α = 98,00(1); β = 90,41(1); γ = 74,84(1)°; Z = 1. Im zentrosymmetrischen Komplex 3 bilden zwei parallel übereinanderliegende Cu2O2‐Ringe eine würfelförmige Cu4O4‐Einheit, deren zwei von Cu‐Atomen gebildeten Kanten von je zwei Triazenido‐liganden überbrückt werden. Jedes Cu2+‐Ion erreicht dabei eine quadratisch‐planare Koordination aus zwe O‐ und zwei N‐Atomen.

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Synthese und Kristallstruktur von [l,3-Bis(4-ethoxyphenyl)triazenido]pyridino-silber(I), einem dimeren Komplex mit kurzem Silber-Silber-Kontakt / Synthesis and Crystal Structure of [1,3-Bis(4-ethoxyphenyl)triazenido]pyridino Silver(I), a Dimeric Complex with a Short Silver-Silver Contact

Cited by 8 publications

References 3 publications

A binuclear silver complex of a tetrapyrazolyl ligand

A binuclear silver complex of a tetrapyrazolyl ligand

Synthesis, Structure, and Magnetic Properties of a 2,2‐Dipyridyl‐2,5‐dihydro‐imidazole‐1‐oxyl‐(L‐)Bridged Disilver Complex [Ag₂L₂](SbF₆)₂: A Four‐Membered Ring from two Ag(I) Ions and two Imine Nitrogen Atoms

1,3‐Bis(4‐fluorphenyl)triazenido‐Komplexe von Kupfer und Silber. Synthese und Kristallstruktur von [Cu(FC₆H₄N₃C₆H₄F)]₄, [Ag(FC₆H₄N₃C₆H₄F)]₄ und [Cu(FC₆H₄N₃C₆H₄F)(OCH₃)]₄

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Synthese und Kristallstruktur von [l,3-Bis(4-ethoxyphenyl)triazenido]pyridino-silber(I), einem dimeren Komplex mit kurzem Silber-Silber-Kontakt / Synthesis and Crystal Structure of [1,3-Bis(4-ethoxyphenyl)triazenido]pyridino Silver(I), a Dimeric Complex with a Short Silver-Silver Contact

Cited by 8 publications

References 3 publications

A binuclear silver complex of a tetrapyrazolyl ligand

A binuclear silver complex of a tetrapyrazolyl ligand

Synthesis, Structure, and Magnetic Properties of a 2,2‐Dipyridyl‐2,5‐dihydro‐imidazole‐1‐oxyl‐(L‐)Bridged Disilver Complex [Ag2L2](SbF6)2: A Four‐Membered Ring from two Ag(I) Ions and two Imine Nitrogen Atoms

1,3‐Bis(4‐fluorphenyl)triazenido‐Komplexe von Kupfer und Silber. Synthese und Kristallstruktur von [Cu(FC6H4N3C6H4F)]4, [Ag(FC6H4N3C6H4F)]4 und [Cu(FC6H4N3C6H4F)(OCH3)]4

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Synthesis, Structure, and Magnetic Properties of a 2,2‐Dipyridyl‐2,5‐dihydro‐imidazole‐1‐oxyl‐(L‐)Bridged Disilver Complex [Ag₂L₂](SbF₆)₂: A Four‐Membered Ring from two Ag(I) Ions and two Imine Nitrogen Atoms

1,3‐Bis(4‐fluorphenyl)triazenido‐Komplexe von Kupfer und Silber. Synthese und Kristallstruktur von [Cu(FC₆H₄N₃C₆H₄F)]₄, [Ag(FC₆H₄N₃C₆H₄F)]₄ und [Cu(FC₆H₄N₃C₆H₄F)(OCH₃)]₄