Viability of half-sandwich complex of heavier group-14 elements (Si-Pb) with neutral Be3 ring and its potential application as H2 storage material

Quantum chemical calculations were carried out to establish the half-sandwich structural behaviour between heavier group-14 elements (Si-Pb) and neutral Be3 ring. The proposed complexes are found to be global minima on the potential energy surface. Quantum chemical investigation revealed that the complexes found possess high bond dissociation energy and also favorable thermodynamics of their formation. The complexes were also found to possess significant aromatic behaviour. In addition, the half-sandwich complexes were found to possess promising chemical properties to be useful for potential H2 storage material under reversible conditions.

Ethanol(nitrato)[tris(4-cyano-3-phenyl-1H-pyrazol-1-yl)hydroborato]nickel(II)

The synthesis and structure is reported of TpPh,4CNNi(NO3)(EtOH) or [Ni(C30H19BN9)(NO3)(C2H6O)], the first half-sandwich complex of a cyanoscorpionate ligand. The pseudooctahedral coordination sphere of the NiII ion is comprised of a tridentate tris(4-cyano-3-phenylpyrazolyl)borate ligand, a bidentate nitrate ligand and a neutral ethanol ligand. The phenyl substituents on the TpPh,4CN ligand are relatively parallel to the planes of the ethanol and nitrate ligands. An intermolecular hydrogen-bonding interaction is evident between the ethanol OH group and the pyrazole CN substituent. The ethanol ligand was modeled with a 0.572 (13)/0.428 (13) disorder of the methyl C atom.

Selective dimerization of a trinuclear mixed-metal sandwich complex: construction of an axially chiral metal skeleton

We report reductive dimerization of mixed metal Pd2Pt or PdPt2 sandwich complexes. The dimerization occurs through selective Pt–Pt bond formation, and the PdPt2 dimer has a unique axially chiral structure derived from the heterometal arrangement.

Bis-cyclooctatetraenyl Thulium(II): Highly Reducing Lanthanide Sandwich Single Molecule Magnets

Divalent lanthanide organometallics are well known highly reducing compounds usually used for single electron transfer reactivity and small molecule activation. Thus, their very reactive nature prevented for many years the study of their physical properties, such as magnetic studies on a reliable basis. In this article, the access to rare organometallic sandwich compounds of Tm^II with the cyclooctatetraenyl (Cot) ligand impacts on the use of divalent organolanthanide compounds as an additional strategy for the design of performing Single Molecule Magnets (SMM). Herein, the first divalent thulium sandwich complex with f¹³ configuration behaving as a Single Molecule Magnet in absence of DC field is highlighted.