scholarly journals Well-defined molecular uranium(iii) chloride complexes

2014 ◽  
Vol 50 (30) ◽  
pp. 3962-3964 ◽  
Author(s):  
Henry S. La Pierre ◽  
Frank W. Heinemann ◽  
Karsten Meyer
Keyword(s):  
Molecular Complexes ◽  
Aprotic Solvents ◽  
Chloride Complexes

The first anhydrous molecular complexes of uranium(iii) chloride, soluble in polar aprotic solvents, are reported, including the structures of the dimeric [UCl3(py)4]2 and the trimetallic [UCl(py)4(μ-Cl)3U(py)2(μ-Cl)3UCl2(py)3].

scholarly journals Structural Diversity of Nickel and Manganese Chloride Complexes with Pyridin-2-One

Molecules ◽  
2020 ◽  
Vol 25 (4) ◽  
pp. 846
Author(s):  
Saša Petriček
Keyword(s):  
Thermal Analyses ◽  
Molecular Complexes ◽  
Structural Diversity ◽  
Carbonyl Oxygen ◽  
Chloride Complexes ◽  
Manganese Compound ◽  
Connectivity Patterns ◽  
Stability Of Complexes ◽  
The Stability ◽  
Monodentate Coordination

Reactions of NiCl2·6H2O and pyridin-2-one (C5H5NO = Hhp) afforded novel molecular complexes, i.e., mononuclear [NiCl2(Hhp)4] (1), dinuclear [NiCl2(Hhp)(H2O)2]2.2Hhp (3) and [Ni2Cl4(Hhp)5]·2MeCN (4), and an ionic complex [Ni(Hhp)6]Cl2 (2). Single-crystal X-ray analyses revealed two modes of Hhp ligation in these complexes: a monodentate coordination of carbonyl oxygen in all of them and an additional µ2-oxygen bridging coordination in the dinuclear complex 4. Three bridging molecules of Hhp span two nickel(II) ions in 4 with a 2.9802 (5) Å separation of the metal ions. Complex 3 is a chlorido-bridged nickel dimer with a planar Ni2(µ-Cl)2 framework. Hydrogen bonds and parallel stacking arrangements of the Hhp molecules govern the connectivity patterns in the crystals, resulting in 1D structures in 1 and 5 or 2D in 3. A single manganese compound [MnCl2(Hhp)4] (5), isostructural to 1, was isolated under the similar conditions. This is in contrast to four nickel(II) chloride complexes with Hhp. Thermal analyses proved the stability of complexes 1 and 3 in argon up to 145 °C and 100 °C, respectively. The decomposition of 1 and 3 yielded nickel in argon and nickel(II) oxide in air at 800 °C.

Probing massive cold cores discovered by ISO in quiescent galactic molecular complexes

2002 ◽  
Vol 4 ◽  
pp. 133-133
Author(s):  
D. Teyssier ◽  
P. Hennebelle ◽  
M. Pérault
Keyword(s):  
Molecular Complexes
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