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.

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).

Group 11 complexes with a phosphanylphosphaalkene ligand: preparation and stability study.

The reactivities of two selected phosphanylphosphaalkenes, PhCP-PBu (1a) and (-MeO-Ph)CP-PBu (1b), toward CuCl, AgCl and (tht)AuCl (tht = tetrahydrothiophene) were investigated. As a result, new phosphanylphosphaalkene dimeric and monomeric complexes were formed (Cu and Ag dimeric and Au monomeric). All obtained products were air and moisture stable and light insensitive.

Understanding the Exchange Interaction between Paramagnetic Metal Ions and Radical Ligands: DFT and Ab Initio Study on Semiquinonato Cu(II) Complexes.

The exchange coupling, represented by the parameter, is of tremendous importance in understanding the reactivity and magnetic behavior of open-shell molecular systems. In the past, it was the subject of theoretical investigations, but these studies are mostly limited to the interaction between metallic centers. The exchange coupling between paramagnetic metal ions and radical ligands has hitherto received scant attention in theoretical studies, and thus the understanding of the factors governing this interaction is lacking.

cAMP-Dependent Signaling and Ovarian Cancer.

cAMP-dependent pathway is one of the most significant signaling cascades in healthy and neoplastic ovarian cells. Working through its major effector proteins-PKA and EPAC-it regulates gene expression and many cellular functions. PKA promotes the phosphorylation of cAMP response element-binding protein (CREB) which mediates gene transcription, cell migration, mitochondrial homeostasis, cell proliferation, and death.