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  • Author: Wolfgang Beck x
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Pentamethylendiazirine (N͡=N) has been found in metal carbonyl compounds as a monodentate two electron ligand (π-CH3C5Η4Mn(CO)2 N͡=N, (OC)5W N͡=N) or as a bidentate four electron ligand ((OC4M (N͡=N)2M(CO)4 (M = Mo, W), (OC)4Fe N͡=N Fe(CO)4). The reaction of Fe2(CO9 with diazirine affords the isocyanate and/or methylenamino-bridged complexes (OC)3Fe(NCO) (N=C< )Fe(CO)3 and (OC)3Fe (N=C< )2Fe(CO)3.

Beiträge zur althochdeutschen und altniederdeutschen Sprache und Literatur in der Kultur des frühen Mittelalters. Eine internationale Fachtagung in Schönbühl bei Penzberg vom 13. bis zum 16. März 1997

Adducts of bis(triphenylphosphine)platinum with diphenylketen and keten-S,S-acetales are formed by reaction of the ketene derivatives with (Ph3P)2Pt(C2H4).

From N-(2,3,4,6-tetra-O-acetyl-β-ᴅ-glucopyranosyl)-thiocarbamate esters (L1) the complexes (η5-C5Me5)(Cl2)M(L1) (M = Rh, Ir), , trans-(n-Bu3P)(Cl)2M(L1) (M = Pd, Pt), trans-Cl2Pt(L1)2, [(Ph3P)2(Cl)Pt(L1)]+, Cl2Pt(μ-L1)PtCl2 and ClAuL1 have been obtained. β-ᴅ-glucopyranosylthiourea (L2) forms the complexes (η5-C5Me5)(Cl)2M(L2) (M = Rh, Ir), (Cl)Me2NCH2C6H4)Pd(L2), (Et3P)Cl2Pd(L2) and Cl2M(L2)2(M = Pd, Pt).

Dihydrido-iridium(III) complexes of the general formula IrH2(aa)(PPh3)2 (aa = L-alaninate, L-valinate, L-prolinate and L-phenylalaninate, 1 - 4 ) have been synthesized. Reactions of 1 - 3 with phenylacetylene give the hydrido-di(phenylethynyl) complex IrH(C≡CPh)2(PPh3)3 (5). The latter compound is also formed from IrH3(PPh3)3 and phenylacetylene. All complexes have been characterized by NMR (1H, 13C, 31P) and IR spectroscopy.

The reaction of bis(2,3,4,6-tetra-0-acetyl-β-D-glucopyranosyl)disulfide with (Ph3P)2Pt(C2H4) gives cis-di(2,3,4,6-tetra-0-acetyl-l-mercapto-β-D-glucopyranosid)bis(triphenylphosphane)platinum (II). A dithiocarbimato complex (Ph3P)2Pt(S2CNR) has been isolated from cis-(Ph3P)2PtCl2, CS2 and 1-0-Methyl-2-amino-2-deoxy-4,6-benzyliden-α,β-D-glucopyranoside. Metal complexes with metal-carbon bonds have been prepared by oxidative addition of monosaccharide halides to (Ph3P)2Pt(C2H4) or to cobalt(I) cobaloxime, respectively. From the reaction of (Ph3P)2Pt(C2H4) with 2,3,4,6 -Tetra-O-acetyl-α-D-glucopyranosyl-bromide the anomers trans-(α- and β-glucopyranosyl) Pt(PPh3)2Br have been obtained. This indicates a radical reaction.