Lanthanides and actinides: Annual survey of their organometallic chemistry covering the year 2014

Tris‐{hydridotris(1‐pyrazolyl)borato}actinide Complexes: Synthesis, Spectroscopy, Crystal Structure, Bonding Properties and Magnetic Behaviour

“…Differences owing to covalency effects are frequently discussed, thus contributing to our understanding of the nature of bonding. [1,2] Severalr eviewsh ave summarised the progress in this field including the annual surveyo no rganometallic chemistry of lanthanides and actinides [3][4][5][6][7][8][9] and the book "Organometallic and CoordinationC hemistry of the Actinides". [10] US colleagues recently reported on the solid-state structure of an Am cyclo-pentadienyl (AmCp 3 )d erivative [11] whereas Evans summarised the lanthanide(II) and actinide(II) chemistry.…”

Cis-1,4-Polymerization of Isoprene by 1,3-Bis(oxazolinymethylidene)isoindoline-Ligated Rare-Earth Metal Dialkyl Complexes

“…The development of highly efficient and selective organometallic catalysts is a permanent topic for olefin polymerization, which brings new opportunities for the synthesis of high-performance (co)polymers with precisely controlled structures and excellent properties [ 1 , 2 , 3 , 4 , 5 , 6 ]. Recently, cis -1,4-polyisoprene ( C PIP) has attracted much attention from the academia and industry in the view that it is the principal component of natural rubber and serves as a strategically important elastomer used for pneumatic tires [ 7 , 8 , 9 , 10 , 11 ]. In general, the practical and most common synthesis method of C PIP is the coordination–insertion polymerization of isoprene (IP) by using homogeneous organometallic catalysts based on rare-earth metals [ 12 , 13 , 14 , 15 , 16 , 17 , 18 ].…”

Supersize Cp! Tetrabenzo[a,c,g,i]fluorenyl complexes of yttrium

“…Cyclopentadienyl (Cp) ligands have long been the dominant ancillary ligand in lanthanide organometallic chemistry with those bearing additional alkyl, silyl or phenyl substituents being especially prominent. 1 Substituted Cp ligands are widely used because their larger size helps to prevent extensive bridging interactions and ligand redistribution reactions resulting in monomeric or dimeric complexes that are easier to characterize and generally more reactive. However, simply adding bulk to the Cp ligand, while effective at producing monomeric complexes, can also render the metal center in those same complexes so crowded that reactivity is hindered.…”

“…Data were measured using omega scans of 0.3 ° per frame for 10 (1), 20(2), 30(5) or 60 (8) seconds, and a full sphere of data was collected. A total of 2450(1,5, 8) or 2400 (2) frames were collected with a final resolution of 0.77 (1), 0.83 (2 and 8) or 0.93 (5) Å. The first 50 frames were recollected at the end of data collection to monitor for decay.…”