Darstellung und Konfiguration von Tricarbonylchromat-Anionen mit SnCl3− und GeCl3− als Liganden

B₃N₃Me₆Cr(CO)₃ reacts with [AsPh₄] [SnCl₃] and [AsPh₄] [GeCl₃] in tetrahydrofuran to give [AsPh₄]₃[Cr(CO)₃(SnCl₃)₃] and [AsPh₄]₃[Cr(CO)₃(GeCl₃)₃], respectively. According to IR. and ¹³C-NMR.-data, the tricarbonylate anions possess a meridional configuration. The donor-acceptor properties of SnCl₃^? and GeCl₃^? in the anions [Cr(CO)₃(ECl₃)₃]^3? (E = Sn, Ge) are very similar. A similar synthesis of [AsPh₄]₃[Cr(CO)₃(SnF₃)₃] was not successful.     

Eisen- und Mangankomplexe mit sauerstoff-, schwefel- und methylen-verbrückten Distibanen und mit Chlorodiphenylstiban als Liganden

Complexes of Iron and Manganese with Oxygen-, Sulfur-, and Methylene-bridged Distibines and with Chlorodiphenylstibine as Ligands The photochemical reaction of CO₃Fe[P(OPh)₃]₂ and of MeCpMn(CO)₃ with the stibines Ph₂SbCl and (Ph₂Sb)₂X (X = O, S and CH₂) yields mononuclear complexes (CO)₂[P(OPh)₃]₂FeL and °Cp(CO)₂MnL (L = Ph₂SbCl, (Ph₂Sb)₂X) and the stibine bridged binuclear complexes °CO)₂[P(OPh)₃]₂Fe{(Ph₂Sb)₂X}Fe(CO)₂[P(OPh)₃]₂ and °Cp(CO)₂Mn{(Ph₂Sb)₂X}Mn(CO)₂MeCp.     

Edelgasverbindungen mit dem Liganden –OTeF5

Noble Gas Compounds Containing the Ligand —OTeF₅ Xe(OTeF₅)₄, Xe(OTeF₅)₆, O?Xe(OTeF₅)₄ as well as mixed substituted derivatives O?XeF_x(OTeF₅)_4?x are described and discussed in context with the known compounds Xe(OTeF₅)₂, and Xe(OSeF₅)₂. The ligand —OTeF₅ is the best stabilizer for noble gas compounds, exceeded only by fluorine itself. Whereas the structures of Xe(OTeF₅)₄ and O?Xe(OTeF₅)₄ are analogous to XeF₄ and XeOF₄, Xe(OTeF₅)₆ is found to be structurally comparable to monomeric (gaseous) XeF₆. Attempts to isolate krypton compounds of the same type were not successful.     

Koordinationspolymere mit Tris(4‐carboxyphenyl)‐phosphanoxid als Ligand – Synthese,Kristallstrukturen und topologische Untersuchungen

The solvothermal reaction of MnCl₂ · 4H₂O or CoCl₂ · 6H₂O with tris(4‐carboxyphenyl)‐phosphine oxide (H₃TPO), in DMF orDMA resulted in the four coordination polymers [M₃(tpo)₂(dmf)(H₂O)₂]( 1 : M = Mn; 2 : M = Co), (NMe₂H₂)[Mn₃Cl(HCO₂)(htpo)(tpo)(H₂O)] ( 3 ) and (NMe₂H₂)[Mn₃(tpo)₂(OAc)] ( 4 ). Structural characterization by X‐ray crystallography revealed that 1 – 4 form 3‐periodical infinite networks; after synthesis solvent molecules occupy the framework pores. The topologies of the networks in 1 , 2 and 3 are unprecedented in literature and are systematically characterized. Furthermore, these topologies could be derived from hexagonal close packing ( 1 , 2 ) and cubic close packing ( 3 ), respectively.Compounds 1 , 2 and 4 were synthesized as pure crystalline materials, their thermal behaviour was examined by TG/DTA measurements and temperature dependent PXRD. 1 , 2 and 4 show remarkable thermal stability with decomposition temperatures between 450 and 500 °C. Temperature dependent PXRD measurements of compounds 1 and 2 reveal a structural transition at 260 °C, framework 4 loses its crystallinity at 210 °C.