Synthetic and theoretical study on novel N-ylidic complexes of mercury as new antibacterial agents.

The novel structure of Hg(II) complexes including the pyridinium ylide CHNCHC(O)CH-m-Br (Y) were synthesized and reported in this study. In the first step, the pyridinium salt CHNCHC(O)CH-m-Br (S) was produced by reacting 2,3'-dibromoactophenone and pyridine. then, treatment of S with KCO gave the related pyridinium ylide Y.

Pd/Pt metallacyclopropa[60]fullerene complexes bearing versatile phosphorous ylide ligands; a comprehensive multi-spectroscopic, electrochemistry, theoretical and catalytic studies.

The synthesis of new Pd/Pt metallacyclopropa[60]fullerene complexes containing unsymmetrical phosphorus ylides [PhP(CH)PPh = C(H)C(O)CH-p-OMe] (n = 1, (Y); n = 2, (Y)) has been reported. The synthesized complexes exhibit different structures, including two P,C- chelated [(η-C)Pd(κ-Y)] (1) and [(η-C)Pt(κ-Y)] (2) complexes and two P-coordinated [(η-C)Pd(Y)] (3) and [(η-C)Pt(Y)] (4) complexes with chain structures. Characterization of all compounds was performed by multi-neclear NMR spectroscopies (H, C and P NMR) and other conventional techniques such as IR, UV-Vis, SEM and cyclic voltammetry (CV) analyses.

N-Heterocyclic carbene or phosphorus ylide: which one forms a stronger bond with group 11 metals? A theoretical study.

N-Heterocyclic carbene and phosphorus ylides are inorganic and organometallic ligands, and their coordination chemistry with transition elements, particularly group 11 metals, would be noticeable. This study seeks to characterize the structure and nature of the C→M bond of group 11 metals (M = Cu(i), Ag(i), Au(i)) in coordination with different monodentate phosphorus ylides {P(Ph)CHR} and N-heterocyclic carbenes (NHC(R)) (where R = F, Cl, Br, CF, CH, H, C(CH), Si(CH), SiH, Ph). In this regard, DFT calculations with the PBE/def2-TZVP level of theory were applied.

P,C-Chelation versus P,P-coordination of unsymmetrical phosphorus ylides in palladacyclopropa[60]fullerene complexes; synthetic, spectroscopic, and theoretical studies.

The new palladacyclopropa[60]fullerene complexes incorporating α-keto stabilized phosphorus ylides were synthesized in a three-component reaction of the unsymmetrical phosphorus ylides [Ph2P(CH2)nPPh2[double bond, length as m-dash]C(H)C(O)C6H4-m-R] (n = 1, R = Br, NO2, (Y(1), Y(2)); n = 2, R = Br, NO2, (Y(3), Y(4))), C60 and Pd(dba)2 (dba = dibenzylideneacetone). The obtained novel P,C-chelated [(η(2)-C60)Pd(κ(2)-Y(1))] (1) and [(η(2)-C60)Pd(κ(2)-Y(2))] (2) complexes and P,P-coordinated [(η(2)-C60)Pd(Y(3))2] (3) and [(η(2)-C60)Pd(Y(4))2] (4) complexes were characterized successfully by IR, UV-Vis, ESI-MS and NMR ((1)H, (13)C and (31)P) spectroscopic methods. Complexes 1-4 are rare examples of palladacyclopropa[60]fullerene complexes with phosphorus ylide ligands.

Simultaneous electrochemical sensing of thallium, lead and mercury using a novel ionic liquid/graphene modified electrode.

In the present manuscript, an electrochemical sensor for the sensitive detection of Tl(+), Pb(2+) and Hg(2+) is described. A new composite electrode has been fabricated using graphene, 1-n-octylpyridinum hexafluorophosphate (OPFP), and [2,4-Cl2C6H3C(O)CHPPh3] (L), as a new synthetic phosphorus ylide. The physicochemical and electrochemical characterizations of fabricated sensor were investigated in details.