Alkoxycarbene Complexes Research Articles

Übergangsmetall—carben-komplexe : C. Aminolyse einer carben-alkoxygruppe und addition an eine dreifachbindung als konkurrenzreaktion — umsetzung von phenylacetylenyl(äthoxy)carbenpentacarbonyl-chrom und-wolfram mit dimethylamin

Dimethylamine is added to the triple bond of phenylacetylenyl(ethoxy)carbenepentacarbonyl-chromium and -tungsten at −20°C in diethylether while at −115°C, −80°C, respectively, selective aminolysis of the carbene-alkoxy group takes place. This way of reaction is referred to well known kinetic data of the aminolysis of alkoxy carbene complexes and the electronic properties of dialkylamino groups.

ChemInform Abstract: CATIONIC CARBENE COMPLEXES OF NICKEL(II)

AbstractDie Umsetzung des trans‐Nickel‐Komplexes (I) mit Silberperchlorat in Aceton oder Benzol und anschließende Reaktion mit Acetylen in Gegenwart von Triäthylamin führen zu dem Nickelacetylid (II), das mit Methanol oder Äthanol und Perchlorsäure die kationischen Carben‐Komplexe (III) liefert.

Cationic platinum(II) acetylenic complexes and their derivatives. VI. Aminolysis and other reactions of cationic platinum(II) alkoxycarbene complexes

Cationic platinum(II) acetylenic complexes and their derivatives. VI. Aminolysis and other reactions of cationic platinum(II) alkoxycarbene complexes

ChemInform Abstract: ALCOHOLYSIS REACTIONS OF CHLOROPLATINUM(II) CHLOROVINYL COMPOUNDS

AbstractDie Platin(II)‐chlorvinyl‐Verbindungen (I) reagieren mit den Alkoholen (II) und Silberhexafluorophosphat (III) zu den Alkoxycarben‐Komplexsalzen (IV).

Cationic carbene complexes of nickel(II)

The nickel acetylide (1) reacts with alcohols in the presence of perchloric acid to give stable cationic alkoxy-carbene complexes (2), the 1H n.m.r. spectra of which show the presence of two conformational isomers; deprotonation with triethylamine occurs at the carbene methyl group.

Alcoholysis reactions of chloroplatinum(II) chlorovinyl compounds

The chloroplatinum(II) chlorovinyl compounds trans-PtCl[CClC(H)R1](PMe2Ph)2, (R1= Me and Ph), react with alcohols R2OH to give alkoxycarbene complexes trans-{PtCl[C(OR2)CH2R1](PMe2Ph)2}+Cl–, (R2= Me, Et, and Prn), which may be isolated as stable hexafluorophosphate salts by the addition of AgPF6.

Intramolecular hydrogen transfer of aminocarbene complexes leading to imines

Displacement of the amino carbene ligand from complexes of the type [(CO) 5CrC(R)NHR′] [R = Ph; R′ = Ph, NHPh; R = Me, R′ = 2-(3-indolyl)ethyl] with a coordinating base such as pyridine, affords the corresponding imine, RCH = NR′, as a result of intramolecular hydrogen transfer. The intermediacy ofa hydrazinocarbene complex in the reaction of an alkoxy carbene complex with hydrazines to give a coordinated nitrile is established.

Cationic acetylenic platinum(II) compounds and their derivatives. I. Alkoxycarbene complexes

Cationic acetylenic platinum(II) compounds and their derivatives. I. Alkoxycarbene complexes

Novel cyclobutadiene–platinum(II) and alkoxy-carbene–platinum(IV) cations

The novel tetramethylcyclobutadiene complex [PtCF3(C4Me4)(PMe2Ph)2]+[PF6]– and the first platinum(IV)–alkoxy-carbene complex [PtMe2(CF3)-([graphic omitted]H2)(PMe2Ph)2]+[PF6]– have been prepared from cationic acetylenic intermediates.