A. Meyer

A one step synthesis of phosphine substituted sulphur capped clusters from phosphine sulphides: X-ray crystal structures of [Fe3(CO)8(µ2-CO)(µ3-S)(Ph2PC2Pri)] and [Ru3(CO)8(µ3-S)2(Ph2PC2But)]

Reactions of phosphine sulphides with Fe2(CO)9 and Ru3(CO)12 occur via phosphorus–sulphur bond cleavage producing sulphido-capped trinuclear clusters; X-ray crystal structures of [Fe3(CO)8(µ2-CO)(µ3-S)(Ph2PC2Pri)] and [Ru3(CO)8(µ3-S)2(Ph2PC2But)] are described.

Stabilisation de l'acetylenedicarbaldehyde. preparation et structure de complexes acetylenedicarbaldehyde-cobaltcarbonyle.

Abstract The chemical stabilization of acetylenedicarbaldehyde ADCA by complexation is reported; the X-Ray structures of two complexes ADCA(Co)2L6 (L = CO, PPh3) show two conformers of the ADCA moiety.

Contribution a l'etude des metaux asymetriques—II : Voie d'acces aux premiers complexes pseudo tetraedriques du chrome (0) enantiomeriquement stables

Abstract Modes of access to several pseudo tetrahedral complexes having an asymmetric chromium atom are presented. The chirality at the metal atom is demonstrated by NMR. The first enantiomers of chiral chromium (0) are obtained in optically pure forms.

Stereoselective nucleophilic attacks on carbenium ions generated from (1-indanol)- and (1-tetralol)Cr(CO)3 as synthetic intermediates.

Abstract Temporary complexation of an arene ring by the Cr(CO) 3 unit bringing about both a considerably enhanced stabilization of adjacent carbenium ions and a total control of nucleophilic attack in an “exo” fashion allows important applications in organic synthesis.

Facile Cr(CO)3 exchange between arenic ligands as a new method for the synthesis of benchrotrenic compounds

Abstract Tertiary alcohols derived from benzenetricarbonylchromium are used as a source of Cr(CO)3 unit; this reaction allows direct synthesis of compounds bearing various functional groups but no asymmetric induction occurs in the exchange.

Stereospecific attack of Grignard reagents on optically active (indan-1-one)-and (1-tetralone)-tricarbonyl chromium derivatives. Use in the synthesis of free optically pure tertiary alcohols

The use of chiral tricarbonyl chromium complexes in the preparation of optically active tertiary alcohol derivatives of indan-1-ol and 1-tetralol is described.

Use of carbonylchromium groups for selective activation of arene substituents

The Cr(CO)2L unit[L = CO, CS, PPh3, P(OPh)3] may be used to increase reactivity, enhance selectivity, or protect the substituents of complexed arene rings with respect to alkylation.

First examples of resolved enantiomeric chromium(0)

The resolution of chiral chromium centres generated from optically active arene tricarbonyl chromium precursors is presented.