SPACE INVADERS: Organometallic fragments such as the ferrocenyl group (shown in red in the picture) help to enhance cellular entry of NLS peptides. Eventually, these nontoxic conjugates find their way to the cellular nucleus as shown by fluorescence microscopy studies in this work. Intracellular delivery to biomolecular targets is still a major challenge in molecular and cell biology. We recent...

Pentacoordinate carbon atoms are theoretically predicted here in a ferrocene dication derivative the eclipsed-(1; C2v), gauche-(2; C2) and staggered-[Fe(Si2-?5-C5H2)2]2+(3; C2h) forms for first time. Energetically, relative energy gaps 2 3 range from ?3.06 to 16.74 ?2.78 40.34 kJ mol?1, respectively, when compared singlet electronic state of 1 at different levels. The planar tetracoordinate (pt...

Recently, we have identified the Al-alkenyl species iBuAl(oct-7-en-1-yl)2 (Al-1) as a promising long-chain branching (LCB) promoter in ethylene polymerization catalyzed by rac-{EBTHI}ZrCl2-based systems, proposing incorporation of its alkenyl moiety into growing polyethylene (PE) chain crucial step for LCB formation. The success process was attributed to high copolymerization ability selected c...

Binary mixtures of Cp2ZrMe2, Cp2ZrCl2, dimethylaluminum chloride, trimethylaluminum, and methylaluminoxane (MAO), as well as Cp2ZrMe2 with boron-based activators, have been studied by in situ IR spectroscopy (Cp = cyclopentadienyl, Me = methyl). The position of a strong band near 800 cm(-1), corresponding to the out-of-plane vibration of the Cp hydrogen atoms, is sensitive to the bonding enviro...