Phosphanylphosphaalkenes as precursors for metallaphosphaalkene complexes.

We synthesized phosphanylphosphaalkenes (biph)CP-P(Bu) (2), PhCP-P(NEt) (3), and (biph)CP-P(NEt) (4). The diaminophosphanyl derivatives reversibly dimerize head-to-head and react with a ruthenium complex, leading to P-P bond activation and the formation of a bridging phospaalkene complex under mild conditions.

Facile interconversion of mesitylcopper into a CuMes-Cubis(amidinate) triangle and a tetracuprous Möbius strip.

A new flexible bis(amidine) ligand featuring two additional N-donor groups incorporates a defined [CuMesCu] fragment from mesitylcopper into a triangular cluster with a reactive organometallic coordination site. Subtle changes to the reaction protocol result in the formation of an intertwined tetracuprous arrangement that adopts the shape of a Möbius strip.

From phosphanylphosphaalkenes to coordination copper and silver polymers containing P-P bonds.

This study was focused on the activation of the CP bond reactions of PhCP-PBu (1) with 1,6-hexanediol and selected dithiols (1,4-butanedithiol, 1,4-benzenedithiol and 1,4-benzenedimethanethiol). These reactions proceed according to a 1,2-addition mechanism, providing new compounds with formulas {(Ph)(H)C-P-PBu}{μ-(O-(CH)-O)}{BuP-P-C(H)(Ph)} (2), {(Ph)(H)C-P-PBu}{μ-(S-(CH)-S)}{BuP-P-C(H)(Ph)} (3a), {(Ph)(H)C-P-PBu}{μ-(S-CH-S)}{BuP-P-C(H)(Ph)} (3b), and {(Ph)(H)C-P-PBu}{μ-(S-CH-CH-CH-S)}{BuP-P-C(H)(Ph)} (3c). Next, the reactions of 3a and 3c with metal chlorides led to the growth of desired coordination polymers of copper(I) and silver(I).

Magnesium(I) Halide versus Magnesium Metal: Differences in Reaction Energy and Reactivity Monitored in Reduction Processes of P-Cl Bonds.

Magnesium(I) halides (Mg X; X=Cl, Br, I), as high temperature molecules, are trapped and finally stored at -80 °C in toluene/donor solutions. These solutions provide insights into the fundamental mechanism of reduction reactions using activated magnesium metal as a prototype for every base metal. The most important example of such a reaction is the preparation of Grignard reagents (RMgX).

Hunting for the magnesium(I) species: formation, structure, and reactivity of some donor-free Grignard compounds.

Magnesium bromide radicals have to be prepared as high-temperature molecules and trapped as a metastable solution because a seemingly simple reduction of donor-free Grignard compounds failed. However, the essential role of magnesium(I) species during the formation of Grignard compounds could be demonstrated experimentally.

Trichloridobis(ethyl-diphenyl-phosphine)(tetra-hydro-furan)-molybdenum(III).

In the mononuclear title compound, [MoCl(3)(C(4)H(8)O)(C(14)H(15)P)(2)], obtained by the reaction of trichloro-tris-(tetra-hydro-furan)-molybdenum(III) and ethyl-diphenyl-phosphine in tetra-hydro-furan (THF) solution, the Mo(III) atom is six-coordinated by one O atom of a THF mol-ecule, two P atoms from two ethyl-diphenyl-phosphine ligands and three Cl atoms in a distorted octa-hedral geometry. The C atoms of the THF molecule are disordered over two positions in a 0.55 (2):0.