Reaktionen koordinierter Liganden, III [1]. Stabilisierung von Dimenthyldiphosphen und Menthylphosphiniden als Brückenliganden in Metallcarbonylkomplexen / Reaction of Coordinated Ligands, III [1]. Stabilization of Dim enthyldiphosphene and Menthylphosphinidene as Bridging Ligands in Metal Carbon... (original) (raw)

Reaktionen koordinierter Liganden, IV [1] Cyclotriphosphankomplexe (RP)3[Cr(CO)5]m (m = 1, 2, 3) durch Dehalogenierung von RPBr2Cr(CO)5 mit Magnesium / Reactions of Coordinated Ligands, IV [1]. Cyclotriphosphane Complexes (RP)3[Cr(CO)5]m (m = 1, 2, 3) by Dehalogenation of RPBr2Cr(CO)5 with Magnesium

Zeitschrift für Naturforschung B, 1988

Compounds RPBr2Cr(CO)5 (R = Me, Et, i-Pr. t-Bu, c-Hex. (-)Menthyl. Ph) and RPBr2W(CO)5 (R = (-)Menthyl, Ph) are obtained from M(CO)5THF and organodibromophosphane. Dehalogenation of the chromium complexes with magnesium in THF leads to (RP)3[Cr(CO)5]m (m = 1. 2, 3) with m depending on the bulkiness of R. When dissolved in THF the binuclear complexes (m = 2) are gradually converted into mononuclear compounds. The isomeric structure of the cyclotriphosphane complexes is deduced from their 31P{1H} NMR spectra.

Systematische Studie zu den Koordinationseigenschaften des Guanidin-Liganden Bis(tetramethylguanidino)propan mit den Metallen Mangan, Cobalt, Nickel, Zink, Cadmium, Quecksilber und Silber. A Systematic Study on the Coordination Properties of the Guanidine

Zeitschrift für anorganische und allgemeine Chemie, 2010

The transition metal complexes with the ligand 1,3bis(N,N,N',N'-tetramethylguanidino)propane (btmgp), [Mn(btmgp)Br 2 ] (1), [Co(btmgp)Cl 2 ] (2), [Ni(btmgp)I 2 ] (3), [Zn(btmgp)Cl 2 ] (4), [Zn(btmgp)(O 2 CCH 3) 2 ] (5), [Cd(btmgp)Cl 2 ] (6), [Hg(btmgp)Cl 2 ] (7) and [Ag 2 (btmgp) 2 ][ClO 4 ] 2 •2MeCN (8), were prepared and characterised for the first time. The stoichiometric reaction of the corresponding water-free metal salts with the ligand btmgp in dry MeCN or THF resulted in the straightforward formation of the mononuclear com

Übergangsmetallkomplexe mit Schwefelliganden, XXIV* Reduktive Nitrosylierung von [MoCl2(dttd)] zu [Mo(NO)2(dttd)];Eigenschaften, Struktur und Reaktion zu NPR3-Komplexen[Mo(NO)(NPR3)dttd] (PR3=PMe3, PEt3, PMePh2, PEtPh2, PPh3;dttd2-=2,3,8,9-Dibenzo-1,4,7,10-tetrahiadecan(2-)) / Transition Metal Co...

Zeitschrift für Naturforschung B, 1986

Metallkomplexe mit biologisch wichtigen Liganden, CLXI [1]. Halbsandwich-Komplexe mit tert-Leucin, Dipeptiden, Pentaglycin und Glutathion als Liganden / Metal Complexes with Biologically Important Ligands, CLXI [1]. Halfsandwich Complexes with tert-Leucine, Dipeptides, Pentaglycine and Glutathione

Zeitschrift für Naturforschung B, 2005

Reactions of L-tert-Leucine (tert-butylglycine), tert-leucine methyl ester, GlyValOMe, and Leu- AlaOMe with the chloro-bridged complexes [Cp*IrCl2]2, [(p-cymene)RuCl2]2 or [(C6Me6)RuCl2]2 in the presence of NaOMe give the complexes [Cp*Ir(Cl)NH2CH(R)CO2] (1), [(p-cymene)Ru(Cl)- NH2CH(R)CO2] (2), Cp*Ir(Cl2)[NH2CH(R)CO2Me] (5), {(C6Me6)Ru(Cl)[NH2CH2CONHCH(R)- CO2Me]}+Cl− (6), [Cp*Ir(Cl)NH2CH2CONCH(R)CO2Me] (7), [Cp*Ir(Cl)NH2CH(CH2CHMe2)- CONCH(R)CO2Me)] (8), and Cp*Ir(Cl2)[NH2CH2CONHCH(R)CO2Me) (9). With pentaglycine the complexes [Cp*Ir(Cl2)(pentaglycinate+Na+)] (10) and [(C6Me6)Ru(pentaglycineOMe- H+)] (11) could be isolated. Coordination of one equivalent of the S-protected tripeptide glutathione to [Cp*Ir(Cl)] and to [(C6Me6)Ru(Cl)] was observed. Some in situ prepared (p-cymene)Ru complexes with deprotonated dipeptide esters were tested as catalysts and the complex [(p-cymene)Ru(Cl)(NH2CH(CHMeEt)NCH (CHMe2)CO2tert-Bu)] gave a yield of 73% and moderate entantiomeric excess (36% ee)...

Übergangsmetall-Methylen-Komplexe, LI [1]. Carbocyclische Carbene, Carben-Brücken, kleine Kohlenwasserstoff-Liganden und Metallacyclen: Beispiele einer umfassenden Synthesekonzeption / Transition Metal Methylene Complexes, LI [1]. Carbocyclic Carbenes, Carbene Bridges, Small Hydrocarbon Ligands, ...

Zeitschrift für Naturforschung B, 1983

Carbene Transfer, Metal-Metal Multiple Bonds Carbene transfer from aliphatic diazoalkanes upon coordinatively unsaturated metal centers is a general synthetic concept that provides straightforward routes into organometallic hydrocarbon chemistry. A comparison focussing on several key reactions of general applicability demonstrates that mononuclear organometal substrates add carbenes that may act as bridging ligands (e.g., compound 6) if they arise from u>,co'-bisdiazoalkanes. By way of contrast, metal-metal double bonds cleanly form dimetallacyclopropane-type derivatives under very mild conditions (7-9). The broadest variety of structures is finally encountered with metal-metal triply bonded precursors such as the molybdenum compounds 3: here, the initial diazoalkane adducts are subject to further rearrangement processes commonly leading to metal-metal single bonds (11) or causing irreversible cleavage of the dinuclear metal systems (10).

Diels- Aider- Addukte des Diphosphens F3CP = PCF3 / Diels-Alder Adducts of the Diphosphene F3P =PCF3

Zeitschrift für Naturforschung B, 1985

The heterocycles 3 to 6 are formed in a one-pot procedure by reacting trifluoromethyl phosphorus diiodide F3CPI2 with tin dichloride SnCl2 in the presence of the corresponding 1,3-dienes. The reactions proceed via [2+4] cycloaddition of the diphosphene intermediate F3CP = PCF3 (1) as suggested by the high yields obtained (50 to 100%) and the formation of the cyclic tetraphosphane (F3CP)4 (2) as the only by-product. Cycloreversion occurs at moderate temperatures as demonstrated by the reaction of 6 with 2,3-dimethylbutadiene to give 3 and cyclohexadiene. The products have been characterized by NMR and mass spectra