Synthese und Kristallstruktur von Blei(II)‐oxidhalogenid‐Alkoholaten mit unterschiedlichen Verknüpfungsvarianten von Pb₄O₄‐Heterokubaneinheiten

Abstract

The reaction of red lead(II) oxide (Litharge) and lead(II) halide (Cl Ϫ and Br Ϫ ) with diethylene glycole at a temperature of 180°C leads to the isotypic compounds [Pb 6 (C 4 H 8 O 3 )O 2 Cl 6 ] (1) and [Pb 6 (C 4 H 8 O 3 )O 2 Br 6 ] (2). In a similar synthesis with PbI 2 as educt at temperature of 160°C the two modifications β-[Pb 6 (C 4 H 8 O 3 )O 2 I 6 ] (3) and α-[Pb 6 (C 4 H 8 O 3 )O 2 I 6 ] (4) were found, whereas at a reaction temperature of 180°C [Pb 9 (C 2 H 4 O 2 )-(C 4 H 8 O 3 )O 3 I 8 ] (5) was surprisingly obtained as product. The X-ray

Partial double bond character in chalcogen compounds of stanna-closo-dodecaborate

“…17 The tin vertices are octahedrally coordinated by ancillary chelating phosphinato and butyl ligands as well as the m 3 -bridging oxo ligands of the core. Similar cubic metalorganic oxo heterocubanes have been reported for lead 23 and the group 13 element oxides [t-Bu 3 SiAlO] 4 , [t-Bu 3 SiGaO] 4 , [(Me 3 Si) 3 CInO] 4 , 24 as well as for chromium [CpCrO] 4 25 and osmium [Os(CO) 3 O)] 4 . 26 The stability of the group 13-group 16 heterocubanes was also investigated with quantum chemical methods.…”

Crystal structure of dilead(II) 2,2′-iminodiethanolate dibromide, Pb2Br2(C4H9O2N)

“…This indicatesthatdiethanolamine is aninappropriate solvent for the planned syntheses route. Wealready have observed elsewhere the deprotonation of alcohol groups of diethylene glycol using inorganic oxides asreactants [2]. This behavior wasn ot detected when solely PbBr 2 wasu sed asr eactant with polyethylene glycol assolvent.…”

“…Our interpretation of deprotonated alcohol groups is justified on the observed distances and charge equalization. Typicald istances between leadi ons and oxygen atoms of alcoholate groups are in the range of 2.35 Åto 2.45Å [2]. Incomparison glycols linked to leadatoms show distance values between 2.580(1) Åand 2.836(1) Å [3,4].…”

Two novel lead(II) complexes of 2-(hydroxymethyl)pyridine: a threefold diamondoid supramolecular network based on Pb4O4cores and a two-dimensional (4,4) network based on Pb2O2units

“…However, the coordination chemistry of lead is a fascinating area as it has a tendency to form polynuclear metal compounds (Aijaz et al, 2011;Davidovich et al, 2009). Up to now, a few well defined cluster-type motifs have been reported, including Pb 2 , Pb 4 , Pb 6 , Pb 7 , Pb 8 , Pb 10 , Pb 14 and Pb 16 clusters (Aslani & Morsali, 2008;Cai et al, 2012;Li et al, 2006;Li, Zhang et al, 2012;Oldag & Keller, 2006;Shieh et al, 2011;Zhang et al, 2012).…”