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Photoelectron spectroscopic and computational study of the PtMgH3,5(-) cluster anions.
Phys Chem Chem Phys
July 2016
Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, USA.
The two cluster anions, PtMgH3(-) and PtMgH5(-), were studied by photoelectron spectroscopy and theoretical calculations. Experimentally-determined electron affinity (EA) and vertical detachment energy (VDE) values were compared with those predicted by our computations; excellent agreement was found. The calculated structures of PtMgH3(-) and PtMgH3 both exhibit η2-bonded H2 moieties.
View Article and Find Full Text PDFN-Alkylfluorenyl-substituted N-heterocyclic carbenes as bimodal pincers.
Dalton Trans
May 2015
Laboratoire de Chimie Inorganique Moléculaire et Catalyse, Institut de Chimie (UMR 7177 CNRS), Université de Strasbourg, 4 rue Blaise Pascal, 67070 Strasbourg Cedex, France.
Two N-heterocyclic carbene precursors having their nitrogen atoms substituted by the expanded 9-ethyl-9-fluorenyl group, namely imidazolinium chloride 6 and imidazolium chloride 7, have been synthesized in high yields from fluorenone (1). The key intermediate of their syntheses is the new primary amine 9-ethyl-9-fluorenylamine (3), which was prepared in 75% yield. Both salts were readily converted into the corresponding PEPPSI-type palladium complexes, 8 and 9 (PEPPSI: pyridine-enhanced precatalyst preparation stabilisation and initiation).
View Article and Find Full Text PDFSimple syntheses, structural diversity, and Tishchenko reaction catalysis of neutral homoleptic rare earth(II or III) 3,5-di-tert-butylpyrazolates--the structures of.
Chemistry
January 2001
School of Chemistry, Monash University, Victoria, Australia.
The homoleptic rare-earth pyrazolate complexes [Sc(tBu2pz)3], [Ln2(tBu2pz)6] (Ln = La, Nd, Sm, Lu), [Eu4(tBu2pz)8] and the mixed oxidation state species [Yb2(tBu2pz)5] (tBu2pz = 3,5-di-tert-butylpyrazolate) have been prepared by a simple reaction between the corresponding rare-earth metal and 3,5-di-tert-butylpyrazole, in the presence of mercury, at elevated temperatures. In addition, [Yb2(tBu2pz)6] was prepared by redox transmetallation/ligand exchange between ytterbium, diphenylmercury(II) and tBu2pzH in toluene, whilst the same reactants in toluene under different conditions or in diethyl ether gave [Yb2(tBu2pz)5]. The complexes of the trivalent lanthanoids display dimeric structures [Ln2(tBu2pz)6] (Ln = La, Nd, Yb, Lu) with chelating eta2-terminal and eta2:eta2-bridging pyrazolate coordination.
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