This review summarizes the progress in organo-f-element chemistry during year 2019. Organo-f-element chemistry, including Sc, Y, lanthanides and actinides, has been a flourishing research area for many years. The mainly ionic Lewis acid character of lanthanide metals provides vast array intriguing structural features supported by numerous organic ligands. In this year’s edition several new type...

Complexes of the form An(2)(C(8)H(8))(2) (An = Th, Pa, U, and Np) were investigated using density functional theory with scalar-relativistic effective core potentials. For uranium, a coaxial isomer with D(8h) symmetry is found to be more stable than a C(s) isomer in which the dimetal unit is perpendicular to the C(8) ring axis. Similar coaxial structures are predicted for Pa(2)(C(8)H(8))(2) and...

A range of 1,3-di(metallocenyl)allylium salts [Mc(CH)(3)Mc'](+)[X](-) [Mc, Mc' = ferrocenyl (Fc), 2,3,4,5,1',2',3',4'-octamethylferrocen-1-yl (Fc' '), ruthenocenyl (Rc); X = BF(4), PF(6)] was synthesized by reaction of (2-lithiovinyl)metallocenes with formylmetallocenes, followed by treatment of the resulting alcohols with HX. Two salts with X = BAr'(4) [Ar' = 3,5-(CF(3))(2)C(6)H(3)] were synth...

This paper presents the results of an investigation of the molecular characteristics that underlie the observed peak position and profile of the nominal 6.2 m interstellar emission band generally attributed to the CC stretching vibrations of polycyclic aromatic hydrocarbons (PAHs). It begins with a summary of recent experimental and theoretical studies of the spectroscopic properties of large (...

Olefin polymerization catalysis is a domain of major research activity. For the last decade, much of this research has been focused in the area of metallocene catalysis, which has been at the front line in driving important technology renewal in the polyolefins industry. Developments in metallocene catalysis have instigated much trade press discussion, and now emerging nonmetallocene catalyst s...

Carbon nanotubes (CNTs) have drawn a great deal of attention since Iijima discovered this new class of allotropes of carbon. Due to their extraordinary mechanical, thermal and electrical properties, CNTs have huge potential in the applications of composite materials, smart structures, chemical sensors, energy storage and nano-electronic devices. However, the challenges remain in the high cost o...

Harry B. Gray is one of the towering figures in modern inorganic chemistry. As author 18 books and more than 950 research articles, he has had an impact on nearly every aspect Over a 60-year career, made seminal contributions to electronic structure theory, spectroscopy, bioinorganic chemistry, sustainable energy research. The recognition metal-ligand multiple bonding inspired Harry’s identific...