1,4-Bis[trimethylsilyl(ethynyl)]naphthalene () and 1,4-bis[trimethylsilyl(ethynyl)]anthracene () undergo diastereoselective coupling with Cp2Zr(py)(Me3SiC[triple bond, length as m-dash]CSiMe3) to give trimeric macrocycles in good yield.

Reaction of Ni(0) in the presence of iodoarylethers leads, after syn intramolecular carbonickelation of the triple bond, to nucleophilic vinylnickels which can be trapped, in a tandem process, by various electrophiles introduced at the onset of the reaction.

The oligomerisation of tert-butylphosphaalkyne, tBuC[triple bond, length as m-dash]P, mediated by Cu(I) complexes yields an unprecedented C4P5 cage compound, which is stabilised in a matrix of copper(I) iodide.

Skeletal development and invasion by tumor cells depends on proteolysis of collagen by the pericellular metalloproteinase MT1-MMP. Its hemopexin-like (HPX) domain binds to collagen substrates to facilitate their digestion. Spin labeling and paramagnetic nuclear magnetic resonance (NMR) detection have revealed how the HPX domain docks to collagen I-derived triple helix. Mutations impairing tripl...

In the title compound, [PtCl(4)(C(14)H(11)N)(2)], the Pt atom lies on an inversion center and has a distorted octa-hedral environment. The main geometric parameters are Pt-N = 1.960 (5) Å, and Pt-Cl = 2.3177 (12) and 2.3196 (12) Å. The N C bond is a typical triple bond [1.137 (7) Å]. The Pt-N C-C unit is almost linear, with Pt-N-C and N-C-C angles of 174.6 (4) and 177.1 (6)°, respectively.

The reaction of the cross-conjugated enediyne Me2C[double bond, length as m-dash]C(C[triple bond, length as m-dash]CSiMe3)2 () with B(C6F5)3 gives the unusual borabicyclo[4.3.0]nonadiene product . The reaction sequence is initiated by 1,1-carboboration and is suggested to take a short subsequent sequence involving borane induced H migration reactions from the geminal pair of methyl groups.

Homogeneous catalysis by gold involves organogold complexes as precatalysts and reaction intermediates. Fundamental knowledge of the gold-carbon bonding is critical to understanding the catalytic mechanisms. However, limited spectroscopic information is available about organogolds that are relevant to gold catalysts. Here we report an investigation of the gold-carbon bonding in gold(I)-alkynyl ...